| Rank | Description | Classified by | Year | |
|---|---|---|---|---|
| Aargonius | genus | any insect that is related to the aargon race | SimonLovelace | 2018 |
| Aartisidae | family | winged round workers without limbs | Disgustedorite | 2018 |
| Abelisauridae | family | theropods with small vestigial arms and prominent head or skull ornamentation | Bonaparte & Novas | 1985 |
| Acariformes | order | often parasitic arachnids with round bodies | Leach | 1817 |
| Accipitridae | family | raptors with sharp vision and strong hooked beaks | Vieillot | 1816 |
| Accipitriformes | order | birds of prey which kill their prey with their hooked talons | Vieillot | 1816 |
| Acrididae | family | grasshoppers, including locusts, which have short and stout antennae | MacLeay | 1819 |
| Actiniaria | order | colorful predatory anthzoans which often resemble odd, tentacled flowers | ??? | ??? |
| Actiniidae | family | sea anemones with one tentacle per space | Rafinesque | 1815 |
| Actinopterygii | class | bony fish with webbed fins supported by bony or horny spines | Klein | 1885 |
| Aerocaulidae | family | four-limbed beakless winged entomosalamandrans | Dinoman972 | 2018 |
| Afrikanofidia | clade | dragons of african origin which resemble eastern dragons | Disgustedorite | 2019 |
| Agamidae | order | a diverse group of insectivorous lizards capable of limited color change | Gray | 1827 |
| Agaricaceae | family | gilled mushrooms with thin gills, round fruiting bodies, a centrally attached stipe and a membrane-like partial veil | Chevall | 1826 |
| Agaricales | order | fungi which produce mushrooms distinguished by their "gills" | Underw | 1899 |
| Agaricomycetes | class | mostly terrestrial, mushroom-forming fungi | Doweld | 2001 |
| Agnaridae | family | jawless pelycosaurs | Dark Ridley | 2009 |
| Agnathadata | family | bipedal salamanders without jaws | StarDotJPG | 2009 |
| Agnathadea | order | jawless mammals | Schnautzr | 2008 |
| Agnatharthridae | family | bipedal humanoid arthropods without jaws | Ghelæ | 2011 |
| Agnathasauridae | family | jawless reptiles | Neini8 | 2008 |
| Akriida | order | hemiinsects that do not strongly resemble a single chordate class | Skullman99 | 2011 |
| Alceoidea | clade | gryphons that do not have wings | Disgustedorite | 2018 |
| Alimentidae | family | artificians that resemble foodstuffs | Ghelæ | 2013 |
| Alligatoridae | family | often freshwater crocodilians with wide, U-shaped snouts and limbs which sprout from the sides of their torsos | Gray | 1844 |
| Allocaudadae | family | willosaurs with no notable features on the end of the tail on their tail | Disgustedorite | 2018 |
| Alphabeticalidae | family | artificians that resemble letters | DeadMonkey8984 | 2013 |
| Alvarezsauridae | family | long-legged feathered dinosaurs with long beak-like snouts and tiny arms bearing an enlarged first claw | Bonaparte | 1991 |
| Amanitaceae | family | gilled mushrooms with tapering stems and a ring below the cap | E.-J. Gilbert | 1940 |
| Ambivitae | order | animal-like floridates | Ghelæ | 2013 |
| Amblypygi | order | arachnids resembling spiders with scorpion-like arms or claws | Thorell | 1883 |
| Ambulocetidae | family | semi-aquatic early cetaceans with webbed feet and large heads, but no flippers, tail fluke, or dorsal fin | Thewissen, Madar & Hussain | 1996 |
| Ambystomatidae | family | four-limbed quadrupedal salamanders with not many special traits | Gray | 1850 |
| Amoebidae | family | the most famous group of amoebas, which often have naked skin and produce numerous pseudopods | Ehrenberg | 1838 |
| Amoebozoa | phylum | a group of protists which includes famous amoebas and slime molds | Lühe | 1913 |
| Amolluscus | order | hemimolluscs that don't resemble any chordate classes very well | Stupo | 2023 |
| Amperturtidae | family | jawless reptiliomorphs that vaguely resemble turtles for their shells | Sky Gummi | 2022 |
| Amphibia | class | chordates with smooth skin and usually webbed hands and feet | Linnaeus | 1758 |
| Amphibiowillidae | family | hand-tailed willosaurs which lack their front limb and their eyes | Stupo | 2023 |
| Amphibolurinae | family | lizards with a thorny appearance, such as the bearded dragon | Wagler | 1830 |
| Amphipatatidae | family | mouthless frogs with very round bodies | Stupo | 2023 |
| Amphipoda | order | laterally-compressed isopod-like crustaceans without a carapace | Latreille | 1816 |
| Amphisaurotetrapodidae | family | tetrapodal reptiliomorphs | Jrpman | 2009 |
| Amphisbaenia | order | long-bodied, usually limbless squamates resembling snakes or earthworms | Gray | 1844 |
| Amphitherae | family | winged snake-like western dragons | Dinoman972 | 2018 |
| Amyctantennidae | family | quadrupedal jawless mammals with an extra pair of arm-like limbs, making them seem mantis-like in posture | Stupo | 2023 |
| Anaspidea | order | bulky gastropods with internal shells, named and distinguished by their "ears" | P. Fischer | 1883 |
| Anatidae | family | web-footed birds adapted for water life and swimming | Vigors | 1825 |
| Anemokinisae | family | cnidarians with locomotory limbs | Parazrael | 2017 |
| Anglerpodidae | family | generally terrestrial or amphibious anglerfish with limbs | Disgustedorite | 2018 |
| Anguillidae | family | freshwater eels | Rafinesque | 1810 |
| Anguilliformes | order | snake-like fish | L. S. Berg | 1943 |
| Animalia | kingdom | the kingdom consisting of all animals | Linnaeus | 1758 |
| Ankylosauridae | family | dinosaurs with round bodies and armored backs, reminiscent of a turtle or an armadillo, which usually have clubs at the ends of their tails | Brown | 1908 |
| Annelida | phylum | invertebrate animals with long segmented bodies | Lamarck | 1809 |
| Anomalocarididae | family | large Radiodonts with fin-like tails and a pair of grasping appendages in front of the mouth | Raymond | 1935 |
| Anseriformes | order | web-footed, typically aquatic birds whose beaks are usually broad and flat | Wagler | 1831 |
| Anspiculidae | family | boneless prolixocephalans with a nacre ridge erupting from their backs | Disgustedorite | 2018 |
| Anteosauridae | family | large carnivorous therapsids with robust upwards-curving mouths | Boonstra | 1954 |
| Anthodae | family | flower-like animals | Ghelæ | 2013 |
| Anthozoa | class | animals such as corals which are attached to the seabed like plants as adults | Ehrenberg | 1834 |
| Anthropomorpha | family | ape-like ichthyosaurs that are not necessarily restricted to water | Khirman | 2018 |
| Anthrowlidae | family | owls with functional arms in place of wings | Disgustedorite | 2018 |
| Antlersauridae | family | lithe, sometimes bipedal armored dinosaurs with deer-like antlers | Disgustedorite | 2018 |
| Antropochoerus | genus | large humanoid suids with large cartoonish eyes, long tusks, ape-like bodies with well-defined pectorals and abdominals and, in the case of females, three pairs of mammaries in place of the abs | Dinoman972 | 2018 |
| Antroponychteridae | family | humanoid bats with wings derived from their front limbs | Dinoman972 | 2018 |
| Anupsidae | family | synapsids that somewhat possess amphibian features | Sky Gummi | 2022 |
| Anura | order | tailless amphibians with a distinguishable head | Merrem | 1820 |
| Anurognathidae | family | small, nocturnal, bat-like rhamphorhynchoideans with short tails and large eyes | Nopcsa | 1928 |
| Apidae | family | a group of long-tongued bees which includes bumblebees and honeybees | Latreille | 1802 |
| Aplysiidae | family | Sea hares with no visible shell | Lamarck | 1809 |
| Aplysinidae | family | sponges that grow into an elongated shape, often resembling a baseball bat | Carter | 1875 |
| Apodidae | family | limbless slugs | Schnautzr | 2008 |
| Apodiformes | order | small birds with naked, scaleless legs unsuitable for walking | Peters | 1940 |
| Apteridrakidae | family | western dragons without wings | Disgustedorite | 2018 |
| Apteriformes | order | wingless birds which do not fall under gryphons or real-world taxa | Ghelæ | 2011 |
| Apterygidae | family | ordinary kiwis with round bodies and short legs | Gray | 1840 |
| Apterygiformes | order | flightless birds with long thin beaks and whiskered faces | Haeckel | 1866 |
| Apterygota | order | wingless insects with jaws which fit no other taxa | Ghelæ | 2011 |
| Apterygotavidae | family | six-limbed wingless birds | Ghelæ | 2011 |
| Arachnida | class | arthropods with a maximum of two segments, a cephalothorax and an abdomen | Cuvier | 1812 |
| Arachnidae | family | a family which formerly held all real spiders but is being split in favor of using real-life families | Ghelæ | 2011 |
| Araneae | order | arachnids with eight legs and two body segments, which are well-known for crafting webs | Clerck | 1757 |
| Arboridae | family | tree- or shrub-like animals | Abrulz | 2009 |
| Archaeidae | family | spiders with long necks and long jaws | C. L. Koch & Berendt | 1854 |
| Archaeoceti | clade | early whales with teeth and, usually, legs instead of fins | Flower | 1883 |
| Architeuthidae | family | usually large squids with serrated rings lining up with the circumference of their suction cups | Pfeffer | 1900 |
| Argillidae | family | cryptians with a clay-like body | Needles 10 | 2010 |
| Argusidae | family | terrestrial octopi with round bodies, multiple eyes, radial mouths located below the eyes, short arms and long legs | 9988 | 2010 |
| Arkona | family | carnivorous akriids | Skullman99 | 2011 |
| Armadillidiidae | family | terrestrial isopods known for curling into balls for defense | Brandt | 1833 |
| Arminoctidae | family | terrestrial anemones with a saurian foot in place of their pedal disk and muscular tentacles with radial mouths and eyes at their ends | Dinoman972 | 2018 |
| Armodronidae | family | flightless round workers with armored bodies | Disgustedorite | 2018 |
| Armorpedae | family | salamanders with a protective head armor | Neini8 | 2008 |
| Arthroaves | order | often feathered, bird- or maniraptor-like hemiinsects | Disgustedorite | 2018 |
| Arthrocephalasauridae | family | Mandibulosaurs with lizard-like postures and arthropod-like heads | Disgustedorite | 2018 |
| Arthrodira | order | placoderms with more traditionally fish-like appearances and jointed necks | Woodward | 1891 |
| Arthropoda | phylum | invertebrate animals with chitinous segmented bodies and legs on at least one of those segments, which are usually jointed | Latreille | 1829 |
| Arthrototeuthidae | family | crurais with two forelimbs and many tentacle hindlimbs arranged in a radial stature | Dinoman972 | 2018 |
| Arthungulidae | family | hooved mammalohemiinsectoids | Sky Gummi | 2022 |
| Artificia | class | animals resembling artificial objects | Technobliterator | 2011 |
| Artiodactyla | order clade | hoofed animals—which bear weight equally on two (an even number) of their five toes | Owen | 1848 |
| Ascaphidae | family | ordinary-looking frogs which keep their tails from when they were tadpoles | Fejérváry | 1923 |
| Asgordidae | family | 3-eyed dragon-like therapsids with humanoid posture | Sky Gummi | 2022 |
| Asilidae | family | powerful, bristly predatory flies with large eyes and a short proboscis | Latreille | 1802 |
| Asteraceae | family | flowering plants with compound flowers, including sunflowers and dandelions | Bercht. & J.Presl | ??? |
| Asterales | order | flowering plants with dense or fused stamens, including daisies and bellflowers | Link | ??? |
| Asterbranchia | order | lagnodactyls with tentacle-like anal fingers which have modified their lateral and raptorial arms into gills | Disgustedorite | 2020 |
| Astergnathidae | family | generally fish-like Ceratoasterformes with conventional jaws | Disgustedorite | 2019 |
| Asteroidae | family | A group that previously contained all starfish but is being cleared in favor of using real-world starfish families | Ghelæ | 2011 |
| Asteroidea | class | typically star-shaped echinoderms with five or more arms | De Blainville | 1830 |
| Astervermidae | family | superficially worm-like gillstars which have fused their gill arms to their bodies | Disgustedorite | 2020 |
| Atramentopascenidae | family | Hemiphoradate quadrupedal mandibulosaurs with two wings for gliding, possessing a robust body form. Characterized by a large, toothed maw, clawed feet, and vibrant blue and green coloration. Known for consuming cephalopod ink | Tm81 | 2025 |
| Atroxignidae | family | feathered wyvern-like theropods with horned heads and spiky tails | Disgustedorite | 2018 |
| Aves | class | birds and bird-like creatures | Linnaeus | 1758 |
| Avicephala | order | early reptiles characterized by their triangular, sometimes beaked, superficially bird-like heads | Senter | 2004 |
| Avicirrusia | order | bird-like hemimolluscs | Disgustedorite | 2018 |
| Axexidae | family | slender earless gryphons with long knotted tails and long curled feathers emerging from the back of the head | Disgustedorite | 2018 |
| Azhdarchidae | family | large pterosaurs with long legs, long necks, large heads, and long toothless beaks | Nesov | 1984 |
| Bahluinidae | family | omnivorous therapsids with paws and crystal-like detail on their back. A canon example is this wiki's Bahluing (fiction) | Sky Gummi | 2022 |
| Balmeridae | family | colossal, sometimes visually faceless, planet-like creatures which often have large spines visible from orbit | Disgustedorite | 2018 |
| Basidiomycota | phylum | fungi which form fruiting bodies commonly known as mushrooms | Moore, R.T. | 1980 |
| Baslikia | family | wingless pelycosaurs with long, lithe bodies which fit no other taxa | DaLucaray | 2010 |
| Bathyergidae | family | somewhat mole-like burrowing rodents with cylindrical bodies, short limbs, small eyes and ears, and a short tail | Waterhouse | 1841 |
| Batoidea | order | flat-bodied cartilaginous fish | Compagno | 1973 |
| Batrachostomidae | family | frogs which resemble two-limbed "hoppers" not yet done with metamorphosis | Ghelæ | 2018 |
| Batrathekidae | family | brutusilids with primate traits | Sky Gummi | 2023 |
| Beehekdatidae | family | spitting, often toothed gryphons with horns and a beak on at least one jaw, some of which may lack wings | Disgustedorite | 2018 |
| Behaleidae | family | eight-limbed mandibulosaurs that usually walk on six legs and have flower- or leaf-life appendages | Sky Gummi | 2022 |
| Belridae | family | mantises with forelimbs ending in graspers with multiple digits | Dinoman972 | 2018 |
| Biopsimaulero | genus | carnitorians with two sets of eyes, two large/mauler jaws and conjoined limbs | Somarinoa | 2009 |
| Bipedarthropoda | order | bipedal humanoid arthropods | Ghelæ | 2011 |
| Bipedavidae | family | two-limbed wingless birds | Ghelæ | 2011 |
| Bipedchimeriade | family | two-legged Chimeras | Poeringu | 2008 |
| Bipedia | family | bipedal humanoid agnathids | Tie-Die Jeans | 2008 |
| Bipedidae | family | worm lizards with two limbs | Taylor | 1951 |
| Bipedisalitidae | family | tamaranian hoppers whose forelimbs are used as legs and their single hindlimb is used as an arm | Stupo | 2023 |
| Bipodicae | family | bipedal hemiinsects with armoured mouthparts | Skullman99 | 2011 |
| Bipodoannelidae | family | podoannelids with two limbs | Neini8 | 2008 |
| Bivalvia | class | headless molluscs with hinged two-part shells | Linnaeus | 1758 |
| Blancamata | family | bipedal theropods with hardly any visible features | Neini8 | 2008 |
| Blattodea | order | cockroaches and termites | Wattenwyl | 1882 |
| Borbidae | family | very round, very wingless perching birds | Disgustedorite | 2018 |
| Bovidae | family | ungulates with two or more horns located at the top of their head | Gray | 1821 |
| Brachiosauridae | family | sauropods with a "crest" on their head that typically supports a larger fleshy nose | Riggs | 1904 |
| Brachiquadae | family | four-armed homosaurs | GTAIVish | 2009 |
| Branchiopodae | family | bipedal humanoid malacostracans | The Kaernk | 2015 |
| Brassicaceae | family | members of Brassicales whose leaves lack stipules and fruits have walls inside of themselves which divide the seeds into rows | Burnett | ??? |
| Brassicales | order | eudicots known for producing mustard oils | Bromhead | ??? |
| Brawlicidae | family | ape-like therapsids with large arms, well-formed ears, and barely fur | Sky Gummi | 2022 |
| Bronkoidae | family | mandibulosaurs with four limbs, numerous eyes and a long trunk | Tm81 | 2022 |
| Brutusidae | family | unarmoured wingless humanoid brutusils | 24.107.96.253 | 2009 |
| Brutusilia | order | amphibians with mammalian features | 24.107.96.253 | 2009 |
| Buccalamaridae | family | prolixocephalans with many tentacles covering their mouths and whose arms are on their bodies rather than heads | Stupo | 2023 |
| Cacatuidae | family | tropical birds with a curved beak and a prominent crest | Gray | 1840 |
| Camelidae | family | ungulates with slender necks, long legs and, sometimes, humps on their backs | Gray | 1821 |
| Camptosuchidae | family | skinny and nimble crocodilians which do not fit real-world taxa | Sillyghostfreak99 | 2010 |
| Camurmanus | family | ichthyostegalians with limbs that end in clawed digits | Poisson14 | 2009 |
| Canidae | family | dog-like mammals | Fischer | 1817 |
| Canis | genus | dog- and wolf-like carnivores | Linnaeus | 1758 |
| Carcharodontosauridae | family | theropods with long, narrow skulls, large orbits, three-fingered hands, and often "horns" or ornamental crests on their heads | Stromer | 1931 |
| Carnitoria | family | cells with insectoid jaws and no front-facing spikes | OluapPlayer | 2009 |
| Carnivora | order | mammals with forward facing eyes and jaws and teeth designed for catching and/or chasing prey | Bowdich | 1821 |
| Carnohoppidae | family | carnivorous hoppers with elaborate crest or sail structures | Disgustedorite | 2018 |
| Carrionogryphidae | family | owl-faced gryphons with prominent horns and reduced forearms | Disgustedorite | 2018 |
| Caryophyllales | order | a diverse group of flowering plants which includes cactuses, beets, and flytraps | Juss. ex Bercht. & J.Presl | ??? |
| Caseidae | family | herbivorous, possibly aquatic synapsids with bulky barrel-shaped bodies and disproportionately small heads | Williston | 1912 |
| Caudata | order | four legged amphibians with a long tail and slender body | Scopoli | 1777 |
| Caudoscorpiidae | family | scorpions without claw weapons | Ghelæ | 2011 |
| Caudovirales | order | bacteriophages with tails or leg-like structures | unknown | unknown |
| Caviidae | family | rodents that are native to South America and include the domestic guinea pig, wild cavies, and the largest living rodent, the capybara | Fischer von Waldheim | 1818 |
| Cecaelavidae | family | avicirrusians with bird-like bodies and multiple tentacle-like legs | Dinoman972 | 2018 |
| Cecaelidae | family | aquatic primates with multiple tentacles for legs | Dinoman972 | 2018 |
| Celeridae | family | blind, typically bipedal mandibulosaurs with both jaws and mandibles | Disgustedorite | 2018 |
| Centaurachnidae | family | spiders with an extension to the body which bears a head and at least one pair of limbs, somewhat reminiscent of the human part of a centaur | Ghelæ | 2011 |
| Centauri | family | chimeras with four legs and at least two arms | Schnautzr | 2008 |
| Centaurinsecta | order | humanoid arthropods with multiple legs sprawled out from the lower body segments | Ghelæ | 2011 |
| Centaurinsectidae | family | purely arthropod-like centaurinsects | Ghelæ | 2011 |
| Centaurisauridae | family | 6-limbed reptiles that resembles centaurs | Sky Gummi | 2022 |
| Cephalopoda | class | molluscs exhibiting a head and tentacles | Cuvier | 1797 |
| Cephalothoraxidae | family | arachnids with fused head and thorax sections | Schnautzr | 2008 |
| Ceratiaceae | family | three-horned armored dinoflagellates which often have hair or spikes on their horns | Kofoid | 1907 |
| Ceratoasterformes | order | generally fish-like Lagnodactyls with horizontal fins and jaw-spikes on either side of the mouth | Disgustedorite | 2019 |
| Ceratopsidae | family | typically quadrupedal neornithischians which usually have horned faces and bony frills | Marsh | 1888 |
| Cercopithecidae | family | often large and terrestrial monkeys with non-prehensile tails | Grey | 1821 |
| Cerebroclypidae | family | even-toed ungulates with elongated snouts and round domes on their skulls | Stupo | 2023 |
| Cervidae | family | ungulates with antlers which, unlike the horns of other ungulates, are temporary and regularly regrown | Goldfuss | 1820 |
| Cetacea | order | mostly massive and carnivorous marine mammals that usually posess nostrils on top of their heads known as blowholes | Brisson | 1762 |
| Cetiosauridae | family | a group of sauropod dinosaurs which need a better description | Lydekker | 1888 |
| Chamaeleonidae | family | slow-moving lizards with a prehensile tail, extensible tongue, protruding eyes that rotate independently, and ability to change color | Rafinesque | 1815 |
| Chaos | genus | large amoebas with many nuclei | Linnaeus | 1767 |
| Chavliodontidae | family | quadrupedal, usually animalistic brutusils | Dinoman972 | 2018 |
| Chilopoda | order | myriapods with a single pair of legs per body segment and generally long limbs | Latreille | 1817 |
| Chimeria | order | mammals displaying parts of multiple unrelated species | Schnautzr | 2008 |
| Chimerochordata | clade | chordates which possess features of animals from other phyla | Opdagon | 2018 |
| Chinchillidae | family | medium-sized rodents with large ears and fluffy tails, some of which may resemble rabbits with long tails | Bennett | 1833 |
| Chirogryphidae | family | gryphons with membranous, bat- or dragon-like wings | Dinoman972 | 2018 |
| Chiroidae | family | jawless akriids | Opdagon | 2018 |
| Chiroptera | order | big-eared flying mammals with wings derived from their hands similar to those of dragons | Blumenbach | 1779 |
| Chitenomollusca | class | arthropods with mollusc traits | Dinoman972 | 2018 |
| Chitenopisces | order | fish-like hemiinsects | Disgustedorite | 2018 |
| Chondrapoda | family | cartilaginous fishapods | TimeMaster | 2010 |
| Chondrichthyes | class | fish with cartilaginous skeletons and often tooth-like scales | Huxley | 1880 |
| Chordata | phylum | bilateral animals with backbones or at least a notochord and a tail which continues past the anus | Bateson | 1885 |
| Chrysididae | family | wasps with brilliant, often metallic colors which are sometimes parasitic | Latreille | 1802 |
| Ciliophora | family | cells with mouth tentacles and no front-facing spikes | Doflein | 1901 |
| Cillopteridae | family | short-legged cilopteriforms with large cillia-like wings and pincer-like beaks | Dinoman972 | 2018 |
| Cillopteriformes | order | sometimes beakless early-creature-like birds with membranous wings that look like cilia parts | Dinoman972 | 2018 |
| Circumoperariusa | order | drone-like insects with spherical bodies | Disgustedorite | 2018 |
| Clavascapulidae | family | apterygotes with long ovipositors and club-like growths on their backsides | Stupo | 2023 |
| Clitellata | class | worms characterized by the clitellum--a segment of the body used to store eggs, which sometimes looks like a bandaid wrapped around the worm | ??? | ??? |
| Cnidaria | phylum | soft-bodied aquatic animals with bodies made primarily of non-living jelly | Gotte | 1887 |
| Coccinellidae | family | small round predatory beetles with spotted wing covers | Latreille | 1807 |
| Cochavidae | family | snail-like gryphoformes with large wings compared their body | Sky Gummi | 2022 |
| Cogoingrediae | family | mandibulosaurians with jaws | 9401france | 2009 |
| Coleoptera | order | insects with sheathed wings, and hardened shelled exoskeletons | Linnaeus | 1758 |
| Comedensidae | family | stout, bipedal and often two-limbed agnathids with long anteater-like snouts | Stupo | 2023 |
| Compsognathidae | family | small theropods with simple fur-like feathers covering their bodies | Cope | 1871 |
| Conqrixidae | family | intelligent, humanoid therapsids who possess fur, sharp talons and are associated with corruption | Sky Gummi | 2022 |
| Cordylidae | family | Lizards with flattened heads and bodies, osteoderm armor, and large rectangular scales | Fitzinger | 1826 |
| Cornupithecidae | family | ape-like primates with horns or antlers | Ghelæ | 2017 |
| Corsetidae | family | generally short-tailed theropods covered in thorns | Dinoman972 | 2018 |
| Corvidae | family | remarkably intelligent, large- to very large-sized birds with strong, stout bills and large wingspans that often have raucous calls. The family contains the choughs, crows, jackdaws, jays, magpies, nutcrackers, ravens, rooks, and treepies | Leach | 1820 |
| Corytophanidae | family | lizards with well developed head crests, with some species being known for their ability to "walk on water" | Fitzinger | 1843 |
| Cotingidae | family | fruit-eating passerines with hooked bills, which sometimes have prominent display structures | Bonaparte | 1849 |
| Cragonidae | ||||
| Crectoidae | family | tyrannosaurid-like reptiles that also resembles crocodilians | fayez2012 | 2022 |
| Cricetidae | family | a group of rodents which includes hamsters, voles, and lemmings | J. Fischer | 1817 |
| Crocodilia | order | carnivorous long-jawed reptiles | Owen | 1842 |
| Crocodylidae | family | usually semiaquatic crocodilians with splayed postures and narrow V-shaped snouts | Cuvier | 1807 |
| Crucibidae | family | long-necked toothed gryphons with scythe claws | Disgustedorite | 2018 |
| Crurai | order | Chitenomolluscs that have jointed limbs | Griffonos123 | 2009 |
| Crusfucuidae | family | round workers with segmented, arthropod-like legs | Disgustedorite | 2018 |
| Crustacea | class | armoured arthropods, often with aquatic adaptations | Brünnich | 1772 |
| Cryptia | phylum | animals that resemble non-living matter, especially anthropomorphized versions of inanimate objects | Schnautzr | 2008 |
| Cryptocerodontidae | family | gryphons with toothed beaks, large talons, and domed heads with horn-like structures on them | Dinoman972 | 2018 |
| Cryptoclididae | family | plesiosaurs with long necks, broad and short skulls and densely packed teeth | Williston | 1925 |
| Crystallogobiidae | family | crystalline, gem-encrusted gobies | Disgustedorite | 2018 |
| Cthulhidae | family | usually bipedal molluscosaurs with faces resembling octopuses, bearing tentacles surrounding their mouths; and usually dragon wings on their backs | Dinoman972 | 2018 |
| Culicidae | family | flies well known for sucking blood | Meigen | 1818 |
| Cuprumidae | family | golems specifically made of copper | Stupo | 2023 |
| Cuttlecervidae | family | long-legged, herbivorous furred prolixocephalans with horned faces | Disgustedorite | 2018 |
| Cuttlesauridae | family | cephalopod-like creatures with reptilian limbs and posture | Disgustedorite | 2018 |
| Cyathdactylum | family | reptiliomorphs with eight or more limbs and suction cup digits | Jrpman | 2009 |
| Cyclostomamphibia | family | jawless ichthyostegalians | Opdagon | 2018 |
| Cyclostomata | class | jawless fish | Müller | 1844 |
| Cyprinodontiformes | order | small, often colorful freshwater fish, many of which are popular aquarium pets | L. S. Berg | 1940 |
| Cytota | phylum | animals that resemble members of other kingdoms, especially anthropomorphized versions of such | ??? | ??? |
| Dackthylididae | family | Artificians whose bodies resemble or are almost entirely made of rings | TheMoonCheese | 2018 |
| Dactiloculus | genus | bipedal hominids whose eyes are beneath their skin, possess spherical hands and feet without dexterity and have one mammary gland if female | Stupo | 2023 |
| Daemonidae | family | dragons with vague primate or chiropteran-like traits, often causing them to look like the devil | Disgustedorite | 2018 |
| Darthridae | family | large humanoid therapsids that do not fit real-world taxa | Furyunleash22 | 2010 |
| Dasyuromorphia | order | carnivorous Australian marsupials | Gill | 1872 |
| Decapoda | order | lobsters, crabs, shrimp, and similar animals | Latreille | 1802 |
| Decapodae | family | not crabs, lobsters, shrimp and others | Latreille | 1802 |
| Decidubipodidae | family | four-limbed herbivorous bipedal pelycosaurs that fit no other taxa | Shadowalkers | 2010 |
| Decoridae | family | long-legged galliformes with tapir-like snouts | Disgustedorite | 2018 |
| Delphinidae | family | dolphins which often have beak-shaped snouts and curved dorsal fins | Gray | 1821 |
| Demogorgonidae | family | four-limbed mammalohemiinsectans with radial mouths which resemble the monsters seen in Stranger Things | Disgustedorite | 2018 |
| Demospongiae | class | sponges with soft bodies that cover a harder "skeleton" made of fibers and proteins | Sollas | 1885 |
| Dentinae | family | humanoid piscine fishapods | TimeMaster | 2010 |
| Deoxyvira | phylum | viruses with genetic code made of DNA | Unknown | unknown |
| Dermaptera | order | insects with long pincers, or cerci, on their elongated abdomens | Geer | 1773 |
| Dermochelyidae | family | marine turtles whose shells are covered with their own skin or flesh | Fitzinger | 1843 |
| Dexterudae | family | six-limbed wingless frogs | Panther2598 | 2010 |
| Diablisauridae | family | humanoid theropods with very bird-like faces, predominantly scaly bodies, and small plumage | Sky Gummi | 2022 |
| Diadematidae | family | diadematoids with crenulate tubercles | Gray | 1855 |
| Diadematoida | order | sea urchins with ten buccal plates around the mouth and hollow spines | Duncan | 1889 |
| Dicraeosauridae | family | sauropods which, compared to other sauropods, have relatively short necks that sometimes have spikes or sails on them | Janensch | 1929 |
| Didelphidae | family | ordinary opossums | Gray | 1821 |
| Didelphimorphia | order | superficially rat-like marsupials famous for playing dead | Gill | 1872 |
| Digitannelidae | family | podoannelids which have evolved two pairs of limbs with which to manipulate objects | Somarinoa | 2005 |
| Dimetrodon | genus | sail-backed sphenacodontids with bulky, somewhat cat-like snouts | Cope | 1877 |
| Dimorphodontidae | family | early pterosaurs with bulky heads and two measures of tooth | Seeley | 1870 |
| Dinocaridida | class | ancient, sometimes legless arthropods or arthropod relatives with a shrimp-like appearance | Collins | 1996 |
| Dinoflagellata | phylum | typically armored, haired or spiked protists which generally have two flagella | Bütschli | 1885 |
| Dinophyceae | class | benthic dinoflagellates found in sediments, which always have armor | Pascher | 1914 |
| Dinoposturidae | family | long-tailed mandibulosaurs with one pair of legs placed under their bodies and a theropod- or kangaroo-like posture, which do not fit other taxa better | Disgustedorite | 2018 |
| Dinornithidae | family | big moas | Owen | 1843 |
| Dinornithiformes | order | large herbivorous birds without even vestigial wings | Bonaparte | 1853 |
| Dinosauria | class | chordates with features intermediate between reptiles and birds | Owen | 1842 |
| Dinosauromorpha | order | non-dinosaurian reptiles with dinosaur traits, such as proto-feathers and having their legs under their bodies | Benton | 1984 |
| Dipodidae | family | mouse-like rodents adapted for jumping, usually making use of long skinny feet and a long tail | Fischer | 1817 |
| Diprotodontia | order | marsupials with a pair of large procumbent incisors | Owen | 1866 |
| Diptera | order | insects with only two wings | Linnaeus | 1758 |
| Doosidae | family | mandibulosaurs with antennas and two bulgy eyes | Sky Gummi | 2023 |
| Draco | genus | flying lizards with wings formed from their ribs and a throat flap called a "gular" | Linnaeus | 1758 |
| Dracomuscidae | family | four-limbed reptiles with membranous insect-like wings | Ghelæ | 2018 |
| Draconia | class | mythical reptile-like creatures, usually capable of flight making use of wings or magic | Disgustedorite | 2018 |
| Draconinae | family | lizards with wings formed from their ribs | Fitzinger | 1826 |
| Dracotyrannidae | family | usually bipedal crocodilians with long claw-like appendages on top of their shoulders | Dinoman972 | 2018 |
| Dragonitidae | family | crocodile-like pelycosaurs with elongated skulls, horns on their heads and usually long hind limbs in comparison to the front limbs | Dinoman972 | 2018 |
| Drakertidae | family | herbivorous horse-headed geckos with ridges of spines on their heads and limbs | Disgustedorite | 2018 |
| Drakia | order | reptile-like dragons typically of western origin | Disgustedorite | 2018 |
| Drakidae | family | lithe, cat-like dragons | Disgustedorite | 2018 |
| Drakisectidae | family | hemiinsects which resemble western dragons with mandibles | Disgustedorite | 2018 |
| Drakoidea | clade | western dragons with wings which do not fall under the wyvern category | Disgustedorite | 2018 |
| Drakonocaudidae | family | western dragons with short or nonexistent tails | Disgustedorite | 2018 |
| Drangooidae | family | Dragon like dinosaurs | fayez2012 | 2022 |
| Drepanosauridae | family | quadrupedal bird-headed reptiles with superficially raptor-like forefeet and clawed tails | Renesto | 2010 |
| Dromaeogryphidae | family | gryphons with dromaeosaur-like heads, wings, and forelimbs | Disgustedorite | 2018 |
| Dromaeosauridae | family | avian theropods that usually posses a large claw on the second toe of the hind foot | Matthew & Brown | 1922 |
| Droseraceae | family | carnivorous plants with jaw-like, sometimes sticky structures designed to catch prey | Salisb | ???? |
| DsDNA | class | DNA viruses which typically infect bacteria | unknown | unknown |
| Duofishidae | family | fish-like hemiinsects with a radial-mouthed fish-like head on both ends of the body | Disgustedorite | 2018 |
| Duplexelpudidae | family | many-eyed amolluscs who have two bodies, often attached by their heads | Stupo | 2023 |
| Dvottidae | family | ostriches with short legs and large heads | Disgustedorite | 2018 |
| Echinodermata | phylum | animals with five-point radial symmetry in their adulthood | Bruguière | 1791 |
| Echinoidea | class | spiny, globular echinoderms | Leske | 1778 |
| Edaphosauridae | family | typically herbivorous small-headed sail-backed pelycosaurs | Cope | 1882 |
| Eelisectidae | family | long, limbless fish-like hemiinsects with mandibles and no fins aside from a tail paddle | Disgustedorite | 2018 |
| Effugilupidae | family | predatory furred prolixocephalans which have many claws and slender grappling forearms | Disgustedorite | 2018 |
| Elapidae | family | venomous, sometimes aquatic long-bodied snakes, including sea snakes and adders | Boie | 1827 |
| Elephantidae | family | a family of large proboscideans that includes the most well-known species of elephants and mammoths | Gray | 1821 |
| Eleutherodontidae | family | gliding, mammal-like therapsids with fur and elongated fingers, which may resemble gliding mammals without ears | Kermack | 1998 |
| Enantiornithes | family | extremely bird-like theropods which are capable of flight and have short or nonexistent tails | Walker | 1981 |
| Ensitrudidae | family | ensitrudiforms with spear-like structures at the end of their heads, round tube-like mouths and long tentacles at the end of their bodies, sometimes resembling odd squids | Flytdais | 2008 |
| Ensitrudiformes | order | lancelets with bony parts | Dinoman972 | 2018 |
| Entomofolia | family | plant-like insects | Dinoman972 | 2018 |
| Entomosalamandra | order | chordates with features of arthropods and amphibians | Dinoman972 | 2018 |
| Enuyioshidae | family | marine worms that possess wing-like chaeta | Tm81 | 2022 |
| Eoantropidae | family | bipedal humanoid palaeozoa | Dinoman972 | 2018 |
| Eobipedidae | family | two-limbed palaeozoans | Dinoman972 | 2018 |
| Eohexidae | family | six-limbed palaeozoans | Dinoman972 | 2018 |
| Eothyrididae | family | lizard-like pelycosaurs distinguished from reptiles by their canine teeth | Romer & Price | 1940 |
| Eotripodidae | family | three-limbed palaeozoans | Dinoman972 | 2018 |
| Ephedraceae | family | extant ephedrales commonly used in medicine | Dumort | ??? |
| Ephedrales | order | superficially grass-like gnetopsids | Dumort | ??? |
| Epidrakidae | family | the most ordinary western dragons, standing on all fours and possessing two wings | Sky Gummi | 2022 |
| Equidae | family | horse-like ungulates | Gray | 1821 |
| Erectolimaxidae | family | slugs with tall, thin bodies rather than the typical long body type | Stupo | 2023 |
| Erinaceidae | family | shrew-like eulipotyphlans with short legs, sometimes covered in modified spine-like fur and with the ability to roll themselves into a ball for defense | Fischer | 1814 |
| Ernaidae | family | lizards with six or more limbs that don't fit in other taxa | Ghelæ | 2017 |
| Ernstillidae | family | long yet thin sponges which possess both spongin and chitin | Valecet | 2019 |
| Estemmenosuchidae | family | large and bulky herbivorous therapsids that posess long and massive skulls with horn-like structures on them | Tchudinov | 1960 |
| Ethesichidae | family | ethereal creatures with psionic powers | Sky Gummi | 2023 |
| Eudicots | class | flowering plants that have three or more pores on their pollen, including most familiar plants | ??? | ??? |
| Eulipotyphla | order | an order of mammals that includes most members of the now-obsolete wastebasket taxon Insectivora, including moles, shrews and hedgehogs | Waddell | 1999 |
| Eurypterida | class | aquatic arthropods with long flat bodies | Burmeister | 1843 |
| Eurypterina | order | sea scorpions with limbs adapted into paddles, claws, and/or hands | Burmeister | 1843 |
| Euwillosauria | order | creatures based directly on the Willosaur, similar tripods, and known evolutionary stages of the willosaur | Disgustedorite | 2018 |
| Exanima | class | cryptians apparently composed by various body parts or souls from living beings | Dinoman972 | 2018 |
| Exoskeleweridae | family | bipedal, short tailed or tailless, exoskeleton-bearing mandibulosaurs which stand more or less upright | Disgustedorite | 2018 |
| Exossisa | clade | clawless, wet-skinned, mostly aquatic prolixocephalans which completely lack any skeleton aside from the cuttlebone | Disgustedorite | 2018 |
| Fagaceae | family | oaks and beech trees | Dumort | ??? |
| Fagales | order | leafy flowering trees and shrubs such as oaks, birches, and walnuts | Engl | ??? |
| Falconidae | family | falconiforms with short, strong hooked beaks and good eyesight | Sharpe | 1874 |
| Falconiformes | order | birds of prey which kill their prey with their beaks | Sharpe | 1874 |
| Falelus | genus | omnivores with 4 legs | A random person363 | 2021 |
| Felidae | family | cat-like mammals | G. Fischer de Waldheim | 1817 |
| Felis | genus | usually carnivorous felines with wide faces and pointed ears that are tipped with short or nonexistent tufts of fur | Linnaeus | 1758 |
| Fifthosauridae | family | ichthyostegalians with a dorsal fin | Cardiackid | 2010 |
| Filventripondus | genus | filventriponds with hoofed pads feet | follower of Christ | 2023 |
| Findiblidae | family | fish-like hemiinsects with mandibles, limbs, exoskeletons, and fluked whale-like tails | Disgustedorite | 2018 |
| Floridata | class | animals resembling plants or fungi | Neini8 | 2008 |
| Foliapinnidae | family | short-necked moas with small clawed wings and long bulky beaks | Dinoman972 | 2018 |
| Foliumavis | genus | phasianids with long beaks containing multiple jaws inside, long but primitive wings, bony legs with multiple spurs and clawed feet, foliage-mimicking feathers, and a long feathered tail | Dinoman972 | 2018 |
| Formicidae | family | a family of insects that includes all ants | Latreille | 1809 |
| Fouscomenocephalidae | family | strange anurans with short and thick tails, slender bodies and large ovoid heads | Dinoman972 | 2018 |
| Frennae | family | winged brutusils | TimeMaster | 2010 |
| Fringillidae | family | seed-eating birds with strong conical beaks | Leach | 1820 |
| Fructidae | family | fruit-like animals | Ghelæ | 2013 |
| Fuchuridae | family | short-bodied luck dragons with four legs | Disgustedorite | 2018 |
| Fukuryuia | clade | fur-covered eastern dragons which have dog- or goat-like heads and completely lack horns, wings, or antlers | Disgustedorite | 2018 |
| Fungi | kingdom | non-photosynthetic, commonly multicellular life-forms with chitinous cell walls, which are well-known for forming mushrooms | Linnaeus (later reworked by Moore) | |
| Fungidae | family | mushroom-like animals | Ghelæ | 2013 |
| Furbyidae | family | wingless owls with very mammal-like ears, often based on the popular Furby | Disgustedorite | 2018 |
| Furihydridae | family | icthyomolluscs with fish-like heads and long tentacle-like appendages at the end of their bodies, each of them ending in a proboscis | Dinoman972 | 2018 |
| Furiornithidae | family | wingless bird-like avicirrusians with long legs and tentacle-like appendages on their heads | Dinoman972 | 2018 |
| Futokuklidae | family | one-eyed amphibians with horns and/or spikes, at least one pair of maces or clawed limbs, many tails and the produce photosynthesis via plant species growing on them | Sky Gummi | 2022 |
| Galagidae | family | primates with pointy or bat-like ears, big eyes and long tails | Gray | 1825 |
| Galliformes | order | heavy-bodied ground-feeding birds | Temminck | 1820 |
| Gammaridae | family | a type of amphipod included under the folk taxonomic category of "scuds" | Leach | 1813 |
| Garyushuidae | family | creatures inspired by the Fanged Wyverns from Monster Hunter | Disgustedorite | 2018 |
| Gastornithidae | family | terror-bird-like fowl with thick beaks resembling those of parrots | Fürbringer | 1888 |
| Gastornithiformes | order | large flightless fowl, which were likely herbivorous in life | Stejneger | 1885 |
| Gastropoda | class | molluscs which crawl along the ground with a muscular foot, which are well-known for the spiral-shaped shells present in many species | Cuvier | 1795 |
| Gecarcinidae | family | true crabs that are adapted for terrestrial existence | MacLeay | 1838 |
| Geikiidae | family | dicynodonts with distinctive bosses on their noses | Nopcsa | 1923 |
| Gekkonidae | family | "typical" geckos with thin or flat tails and little or no ornamentation | Gray | 1825 |
| Gekkota | order | lizards which commonly have cat-like eyes and sticky toe pads | Cuvier | 1817 |
| Gelatavolitidae | family | mostly terrestrial jellies with two long, thin stalks, each possessing one small eye at the end | Stupo | 2023 |
| Gembound | genus | four-eared cats with gem-tipped antennae on their heads and tails and additional gemstones on various parts of their bodies, based on the open species by the same name | Disgustedorite | 2018 |
| Gemraptor | genus | therioraptorids with gemstones and glowing markings, based on the species on the virtual pet site Furvilla | Disgustedorite | 2018 |
| Geraniaceae | family | herbs and subshrubs with unique schizocarp fruit made of 3-5 achnes and which often have their flowers growing from a central point, such as cranesbills and storksbills | Juss | ??? |
| Geraniales | order | plants with flowers that produce nectar and usually have perfect five-point radial symmetry in their petals | Juss. ex Bercht. & J.Presl | ??? |
| Gerridae | family | aquatic bugs with proboscises and the ability to stand on water due to hydrophobic hairs on their feet | Leach | 1815 |
| Ghinghasidae | family | arthroaves with clawed wing-like arms, short antennae on their heads and spike-shaped proboscides serving as mouths | Dinoman972 | 2018 |
| Gigafuridae | family | whales whose mouths are composed of long proboscides | Dinoman972 | 2018 |
| Giraffidae | family | ungulates with long necks, long legs, and skin-covered horns known as ossicones | Gray | 1821 |
| Glires | order | mammals with continuously growing incisors in the upper and lower parts of the jaws | Linnaeus | 1758 |
| Globberidae | family | four-limbed quadripedal akriids | Somarinoa | 2012 |
| Gnatharthridae | family | bipedal humanoid arthopods with jaws | Ghelæ | 2011 |
| Gnetophyta | phylum | cone-bearing plants that are not conifers and bear flower-like structures as well | ??? | ??? |
| Gnetopsida | class | extant gnetophyta | Thom | 1886 |
| Gobiiformes | order | goby-like fish, many of which can breathe air | Günther | 1880 |
| Gobisectidae | family | fish-like hemiinsects which have two limbs, a strong tail, and some form of fin or wing, reminiscent of a mudskipper | Disgustedorite | 2018 |
| Goniasteridae | family | Typical five-armed starfish which are typically covered in granular, seed-like protuberances | Forbes | 1841 |
| Gonyaulacales | order | marine, sometimes toxic and/or photosynthetic members of dinophyceae | F.J.R. Taylor | 1980 |
| Gorganidae | family | stout therapsids with bull-like horns, stalk eyes, and kangaroo-like posture | fayez2012 | 2022 |
| Gorgonopsidae | family | large carnivorous therapsids with erect hindquarters, some of which possessed saber teeth | Lydekker | 1890 |
| Grecochimeridae | family | feline-like chimeras with tails resembling serpents and an ungulate-like head on their backs | Dinoman972 | 2018 |
| Greevilidae | family | bipedal bird-headed reptiles | Schnautzr | 2008 |
| Groxidae | family | small carnivorous/omnivorous bipedal therapsids reminiscent of The Grox | OluapPlayer | 2008 |
| Gryllidae | family | insects with elongated, thread-like antennae which use their wings to produce sound | Laicharting | 1781 |
| Gryphoformes | order | chimeric birds with distinct non-wing forelimbs and hindlimbs, based on mythological gryphons and similar creatures | Ghelæ | 2011 |
| Gryphonidae | family | gryphons with the head, forelegs/talons, and wings of a bird of prey, usually an eagle; and the hindquarters, tail, and ears of a feline, usually a lion | Ghelæ | 2011 |
| Gryphonidontoidea | clade | gryphons with teeth | Disgustedorite | 2018 |
| Gryphonoidea | clade | winged gryphons without teeth | Disgustedorite | 2018 |
| Hadrosauridae | family | bird-hipped dinosaurs which are typically quadrupeds but may be facultative bipeds and often have crests for vocalization | Cope | 1869 |
| Hailidae | family | palaeozoans with many tentacle-like limbs | Dinoman972 | 2018 |
| Harantridae | family | slugs with hard, mineral beaks | Carenthos | 2008 |
| Hariidae | family | entomosalamandrans with eight or more limbs | Dinoman972 | 2018 |
| Helicidae | family | snails with typical round shells | Rafinesque | 1815 |
| Helicoidea | order | Air-breathing land snails | Rafinesque | 1815 |
| Hemiinsecta | class | chordates with arthropod features | Tigress Dragonblade | 2009 |
| Hemimollusca | class | creatures with both chordate and mollusk traits | Disgustedorite | 2018 |
| Hemiprocne | genus | birds that are/resemble real world treeswifts | Nitzsch | 1829 |
| Hemiprocnidae | family | small birds resembling true swifts with forked tail feathers and crests on their heads | Nitzsch | 1829 |
| Hemiptera | order | superficially beetle-like insects that are not beetles | Linnaeus | 1758 |
| Herpestes | genus | mongooses with long tails and bodies, as well as five fingers on each paw | Illiger | 1811 |
| Herpestidae | family | mustelid-like carnivorans with long faces and bodies, small rounded ears, short legs, and long tapering tails | Bonaparte | 1845 |
| Herrerasauridae | family | early theropod-like dinosaurs with primitive traits, such as five or more digits in hands and/or feet, and narrow dromaeosaur-esque skulls | Reig | 1963 |
| Heteronemiidae | family | stick insects with thin, uniform bodies | ??? | ??? |
| Hexapedae | family | ungulates with more than four limbs which do not fit any real-world taxa | C-Rex | 2013 |
| Hexapedia | family | six-limbed Chimeras | Neini8 | 2009 |
| Hexapoditherapsidae | family | wingless six-limbed therapsids | Schnautzr | 2008 |
| Hexatari | family | centauroid crurais with long, thin limbs and erect torsos | Griffonos123 | 2009 |
| Hexlimbarostridae | family | winged gryphons with toothy beakless snouts | Disgustedorite | 2018 |
| Heynadae | family | terrestrial humanoid lizards that fit no other taxa | Ghelæ | 2017 |
| Hieracosphinxidae | family | earless alces with purely cat-like bodies and hawk- or falcon-like faces | Disgustedorite | 2018 |
| Higuratidae | family | leeches with plant parts | Dinoman972 | 2018 |
| Hippogryphidae | family | often herbivorous gryphons with hooves and horse-like tails | Disgustedorite | 2018 |
| Hippopotamidae | family | large and bulky ungulates with tusks | Gray | 1821 |
| Hirudina | order | parasitic or predatory worms well-known for sucking blood | ??? | ??? |
| Hirundinidae | family | passerine birds with short wide beaks, long pointed wings, and long often forked tails | Rafinesque | 1815 |
| Hominidae | family | intelligent tailless apes which generally lack special ornamentation and may have flat faces | Linnaeus | 1758 |
| Homo | genus | regular humans and related "races", such as elves, dwarves and Neanderthals | Linnaeus | 1758 |
| Homoarthropoda | class | a taxon that used to contain all humanoid taxons, but is being cleared at the moment | Ghelæ | 2011 |
| Homoavidae | family | wingless humanoid birds | Ghelæ | 2011 |
| Homocetidae | family | humanoid cetaceans which, other than their limbs, look more or less like modern aquatic cetaceans | Disgustedorite | 2018 |
| Homogryphonidae | family | gryphons with six or more non-wing limbs | Ghelæ | 2011 |
| Homosauria | order | humanoid reptiles that do not clearly fit into other orders | Schnautzr | 2008 |
| Homossidae | family | human-like skeletons | Dinoman972 | 2018 |
| Hopperia | order | three-limbed tamaranian creatures which stand on one leg | Disgustedorite | 2018 |
| Hopperidae | family | herbivorous hoppers with two eyes, one leg, two arms, and a tail | Disgustedorite | 2018 |
| Hopperus | genus | Includes most species of hoppers Featuring Tamaranian Hoppers | Disgustedorite | 2018 |
| Hosapdata | family | humanoid salamanders | Foxman1123 | 2008 |
| Humusoptera | family | typically bipedal terrestrial cephalopods with distinct necks and heads | Dark Ridley | 2009 |
| Hupehsuchia | order | transitional ichthyosauromorphs which are typically aquatic or semi-aquatic and have limbs instead of fins | Young & Dong | 1972 |
| Hupehsuchidae | family | typical Hupehsuchians with webbed feet and paddle tails, which may have either baleen or toothless beaks | Unknown | Unknown |
| Hyaenidae | family | hyena-like creatures | Gray | 1821 |
| Hydraidae | family | wingless, usually snake-like western dragons with multiple heads | Dinoman972 | 2018 |
| Hymenoptera | order | insects with stingers and well-developed mouthparts, known for sometimes forming eusocial colonies with one or more queen | Linnaeus | 1758 |
| Hystriapsidae | family | therapsids with a large number of spikes like porcupines' | Sky Gummi | 2022 |
| Ichthydrakonidae | family | ichthyostegalians with 6-limbs, which emulate wings | Sky Gummi | 2022 |
| Ichthyosauria | order | aquatic reptiles with shark-like bodies | Blainville | 1835 |
| Ichthyosauridae | family | typical ichthyosaurs with dolphin-like bodies and snouts | Bonaparte | 1841 |
| Ichthyostegalia | order | fish with amphibian features | Säve-Söderbergh | 1932 |
| Ichthyowilla | clade | aquatic willosaurs | Disgustedorite | 2018 |
| Ichthyowillidae | family | willosaurs which have returned to the water | Disgustedorite | 2018 |
| Icthyomollusca | order | fish-like hemimolluscs | Disgustedorite | 2018 |
| Ignidae | family | fire-like spirits which provide light and usually don't have true bodies | Stupo | 2023 |
| Iguania | order | commonly arboreal lizards with usually primitive tongues | Cope | 1864 |
| Iguanidae | family | iguana-like lizards | Oppel | 1811 |
| Imparmembri | family | Multoscapits with an odd amount of limbs | N3therIsHere | 2018 |
| Incisivosauridae | family | herbivorous maniraptors with somewhat short tails and rodent-like teeth | Disgustedorite | 2018 |
| Insecta | class | arthropods with six limbs and three main body segments | Linnaeus | 1758 |
| Insectopiscidae | family | fish-like hemiinsects with limbs, exoskeletons, antennae, and a pair of antenna-like tails | Disgustedorite | 2018 |
| Intestisauridae | family | Mandibulosaurs with long, twisting or tangled limbs | Disgustedorite | 2018 |
| Isopoda | order | armored crustaceans with flat bodies which appear oval-like from above | Latreille | 1817 |
| Ixodidae | family | ticks with hard exoskeletons | C. L. Koch | 1844 |
| Jantokidae | family | superficially hippo-like ungulates with short necks and bulky upper bodies | Disgustedorite | 2018 |
| Jayvoridae | family | short-tailed toothed gryphons which commonly bear many horns and spikes | Disgustedorite | 2018 |
| Jelezleonidae | family | mammal-like hemiinsectans with mammalian mouthparts | Tigress Dragonblade | 2009 |
| Jeliidae | family | bipedal jackalope-tapir-like ungulates with sharp hand claws | Tm81 | 2022 |
| Jerigmucidae | family | robust therapsids with long necks, bird-like beaks and horns on their heads | Joch22 | 2011 |
| Juliidae | family | snails with shells divided into 2 halves | E. A. Smith | 1885 |
| Kaabiidae | family | round, short-legged creatures inspired by those in Kirby games, many of which are capable of some form of flight | Disgustedorite | 2018 |
| Kabutopsidae | family | often terrestrial sea scorpions with large claws | Disgustedorite | 2018 |
| Kataridae | family | multiform crustaceans with aquatic adaptations and proboscides at the end of their tails | Dinoman972 | 2018 |
| Keythongidae | family | eared alces with spiky bodies | Disgustedorite | 2018 |
| Kharavasauria | order | reptiles that evolve to their mature forms via metamorphosis and do not fit real-world taxa | OluapPlayer | 2011 |
| Kibanidae | family | four-limbed entomosalamandrans with beaks | Dinoman972 | 2018 |
| Kicathidae | family | armoured humanoid theropods | Ghelæ | 2013 |
| Kipiscisauridae | family | chimeric reptiles with fish and insectoid traits | Sky Gummi | 2023 |
| Kiwicornidae | family | long-legged semi-aquatic predatory kiwis with horned heads | Disgustedorite | 2018 |
| Kobistetidae | family | Two Legged Piece Of Grox Like | Tm81 | 2023 |
| Kogus | genus | cornupithecids with clawed digits and a single spiral-shaped horn at the top of their heads | Dinoman972 | 2018 |
| Kongamatepteridae | family | REAL more pterosaurs living in the forest but flying recant long tail (with long mouth) | Disgustedorite | 2019 |
| Korosauridae | family | bipedal crocodilians that do not fit any real-world taxon | Spacerspore | 2010 |
| Kouticephalidae | family | alces with an object or non-head body part in place of the head, which cannot be definitively placed in other alce families | Disgustedorite | 2019 |
| Kratimsoidae | family | 6-limbed cycloptic mammalohemiinsectoids | Sky Gummi | 2022 |
| Kroctogrisidae | family | eight-limbed chimeras that resemble crocodiles and tigers | Sky Gummi | 2022 |
| Krustaliynidae | family | intelligent mandibulosaurs that grow and rely upon crystals | Sky Gummi | 2022 |
| Kryteirreia | family | wingless pelycosaurs with six or more limbs that fit no other taxa | 98.172.26.163 | 2010 |
| Kulindadromeidae | family | feathered bipedal neornithischians with scaly tails | Disgustedorite | 2018 |
| Kyklognathidae | family | often bipedal, six-limbed hemiinsects with radial jaws and typically an odd number of eyes | Disgustedorite | 2019 |
| Lagnodactylia | class | chordate-like creatures which generally have 4 limbs in a diamond arrangement, one of which is modified into a tail | Disgustedorite | 2019 |
| Lamiaidae | family | primates with scaly snake-like tails in place of their hindlimbs | Dinoman972 | 2018 |
| ... further results | ||||
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