[Phantasm]

Yeah. There's three basic taxonomy structures: Aristotlean, Linnaean, and Modern. Linnaean built upon Aristotlean with what was learned about biology between Classical Greek times and the 1700s, and Modern builds upon Linnaean taxonomy with what we've learned since then with genetics.

As I stated, in my own setting I use the Aristotlean breakdown, with some changes to account for extant non-feathered dinosaurs. (In particular, my "Slugs" is by even Linnaean terms not correct, and the molluscs in "Slugs" should by all rights include the "Squids".) I wouldn't use it for a modern setup. (By all rights, most DF Oozes are likely closely related to RL slime molds....)