this post was submitted on 11 Sep 2023
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[–] Jonathan12345@lemmygrad.ml 6 points 1 year ago (2 children)
[–] HaSch@lemmygrad.ml 3 points 1 year ago (1 children)

Ok wow you learn something new every day. Taxonomy is weird

[–] Shrike502@lemmygrad.ml 3 points 1 year ago (1 children)

It's fairly simple with dinosaurs, imo. If it flies or swims - it's not a dinosaur. So plesiosaurs, mosasaurs, ichthyosaurs are not dinos. Se goes for pterosaurs. It's terrestrial animals where it gets difficult

[–] unnecessarygoat@lemmy.world 1 points 1 year ago (1 children)

what about animals like archaeopteryx, that could fly, or spinosaurus that had adaptations for swimming?

[–] Shrike502@lemmygrad.ml 2 points 1 year ago

Rule of thumb, it's not perfect. Plus AFAIK archaeopteryx was more of a glider, rather than a dedicated flyer (the way pterodactyl was). You can also tell bird-like theropods from pterosaurs by the legs - birds have long-ish legs, while pterosaurs have short-ish legs (like bats).

As for the spinosaurs, while a swimmer (it's hard to keep track, poor sod is getting retconned every other day) it was not an open sea kind of swimmer - just compare spinosaur's limbs to that of a mosasaur

Most people consider and refer to everything bofore Ice age as dinosaurs, so not weird.