Board Thread:Wiki Discussion/@comment-32744161-20180105112557/@comment-47205-20180105180040

There are indeed problems with the current taxa, especially within Chordata. Hemiinsecta is one problematic class that I spent some time working on back in July.

One idea that's recently occured to me is that Hemiinsecta itself might be better in Arthropoda, so as to be arthropods with chordate features rather than vice versa. In that case, it might be appropriate for the more Arthropod-like taxa, such as (as you mention) Akriida and Radiostomata, to be moved out into different classes.

Mammalohemiinsecta was originally split in the manner that you describe, but there were only a few creatures with avian parts (i.e. beaks) which all fit into Rostrumae.

As for retiring Hemiinsecta, certainly some creatures are similar enough to chordates that they could be moved into chordate classes. However, a lot of creatures don't really resemble any chordates (or arthropods) at all; they just have both arthropod and non-arthropod parts slapped onto the same body. This relates back to the Mammalohemiinsecta issue; it's not accurate to simply split it between mammalian and avian forms, because a lot of creatures don't fit either of those descriptions.