Monster Hunter Wilds got me wanting to make Monster taxonomy diagrams again, so I decided to start off with the newest (natural) monster class, Cephalopods!
This tree was relatively simple, as unlike with other groups, most of the members had very clear real life analogs.
I decided to place Escunites as Nautiloids rather than Ammonoids due to the hood over their head and their eyes being more akin to those of nautilus.
Nu Udra is an octopodiform, that one's easy, and the Rise/Sunbreak squids are decapodiforms.
Interestingly enough, some cephalopods in MH seem adapted to freshwater (with no irl cephalopod displaying this trait for multiple reasons). In the case of the two cuttlefish, the Goliath Squid and Nakarkos, I like the idea of them sharing an euryhaline (that is, an animal capable of surviving in both salt and freshwater) ancestor within sepiida, with Nakarkos retaining this adaptation while the Goliath Squid fully adapted to freshwater in the waterways of the Eastlands.
Then there's Xu Wu. It's got a whole array of weird anatomical quirks that make it quite hard to classify. I placed it into the fictional order Paraoctopodiformes, which I've depicted here as an early divergent Coleoid group. The placement is uncertain, however, which is why I made the line discontinuous. In truth, we don't know enough about Xu Wu to fully ascertain what Paraoctopodiformes actually are. Cephalopods? Some other type of mollusk? An entirely different phylum of animals?
Anyway, that'd be all so far. I'll post more diagrams in the future for each group. Feedback will be appreciated.