Ianthasaurus: An Early Sail Backed Synapsid 

CHimerasuchus mentions the same at 7:05.

@@IanPendleton-gh6ox Yep I’m agreeing 👍

I probably will eventually, but I am trying to space out the videos about mega-crocs.

@@chimerasuchus understandable

The image was put under the Creative Commons Attribution-Share Alike 4.0 International license.

@@chimerasuchus I don't know if I posted my art under this international licence. If you could tell exactly where you find it I may try and see if that's accurate.

@@guillaumebabey4484 It was on Wikimedia Commons.

Yeah that's not right. I never put on Wikipedia myself. Someone reposted it without my permission. At least they didn't forget my name.@@chimerasuchus

Crested chameleon

@@posticusmaximus1739 ah yes.. I completely forgot about that cute lil guy!! Thank you for mentioning it.. I probably should've mentioned that the sails seen in these early synapsids served a completely different purpose to the sails we see today: crested chameleons use them for mating displays; sailfish for increased speed & Man-o'-War jellyfish for a variety of uses

Man of War isn't actually a jellyfish. It's related, but it's a colony organism called a siphonophore.

Basilisk lizards: Are we joke to you?

@@ExtremeMadnessX whoops

They aren't closely related. Synapsids are a separate group of animals.

Stegosaurs were dinosaurs, not synapsids. Their plates evolved from osteoderms rather than neural spines. That said, stegasaur plates and edaphosaurid sails have been proposed to have had similar functions.

All mammals are equally close to it.

During the Permian Period (roughly 300-250 million years ago) the dominant large land animals were synapsids, the distant relatives of mammals. Most were rendered extinct during the mass extinction at the end of the Permian, and they were replaced by the archosauromorphs, the group of reptiles dinosaurs and crocodilians belong to, early during the Triassic Period. While archosauromorphs were "dominant", there were still a few large synapsids, and the crocodilian branch of Archosauromorph, Pseudosuchia, was actually more abundant and diverse than the dinosaurs. That only changed due to another mass extinction at the end of the Triassic, which left the dinosaurs as the only remaining large to medium sized terrestrial animals. So the rise of the dinosaurs was actually the result of two mass extinctions. After the non-avian dinosaurs perished, there wasn't really a dominant group of animals. Some birds and ectothermic reptiles grew bigger, but large animals weren't common until mammals finally took up the mantle.

oh thanks for responding? but wat about the stem dinos and the crocs that walked on 2 legs werent they also occupying a niche that prevented the tru dinos from taking it until they died.@@chimerasuchus

@@iceworld6104 Yep. The Carnian pluvial event early during the Late Triassic opened up niches for the dinosaurs, but they weren't the dominate archosaurs, let alone the dominate animals, until after the end-Triassic mass extinction.

hmm interesting thank you for answering this was on my mind for a while now and i couldnt find a good answer.@@chimerasuchus

After having made videos about the topic for so long, I have found that using paraphyletic grades as common words (as "fish" is used) can be quiet helpful when trying to communicate these topics. In this case, the term "pelycosaur" was used to not just distinguish these early synapsids from mammals but from the rest of the therapsids which dominated the later half of the Permian Period.

@@chimerasuchus understandable within that context lml