Thread:Ghelæ/@comment-32744161-20180526135800/@comment-32744161-20180527162911

Primary mouthparts is not based on morphology. Being elongated and having a head and body smoothly go into eachother are traits they share. Most of chordata's classes are defined by integument. And I can easily throw your other argument against many other taxons. For the differences, if you can collapse deuterostomia into a family with each of those differences, then I can keep furian how it is now, with all furians.