Post by Infinity Blade on Aug 20, 2020 0:01:23 GMT 5
Barosaurus specimens. AMNH 6341 (black), BYU 20815 (blue), and BYU 9024 (dark blue). The last is figured as a C9, which Mike Taylor and Matt Wedel consider to be the most likely serial position (although it's possible that this is wrong).
Oh, and Allosaurus fragilis in green and Saurophaganax maximus in grey.
This image below is hardly a useful size comparison given the perspective of the shot, I just really wanted to show off this picture, which also shows the differences between mammoth and mastodon teeth.
Post by Supercommunist on Oct 19, 2020 3:09:27 GMT 5
I wonder how giant crocodilians like deinosuchus moved on land. Modern extant crocodiles are pretty slow on land so obviously their much larger extinct relatives were obviously quite sluggish themselves, but I can't imagine them being completely unable to high-walk otherwise I doubt they'd grow so large in the first place.
Post by Infinity Blade on Oct 19, 2020 17:19:26 GMT 5
I don't know about Deinosuchus, but we know that Purussaurus evolved an extra sacral bone (a functional dorsosacral) that articulated with the pelvis to help with weight support. It also had a more vertically oriented pectoral girdle and a femoral head that would have experienced low torsional stress. So there were some postural changes that accompanied greater body size.
Mind you, this was for P. mirandai, which was far from the biggest species (~2,600 kg). I assume P. brasiliensis would have had these same features too. Maybe Deinosuchus did some of the same things, but I don't know for sure.
Hammerhead: I’m planning on watching the new “65” movie that’s coming out in March. I don’t expect it to be scientifically accurate for the most part but I do think it’ll be fun.
Jan 29, 2023 9:50:32 GMT 5
Supercommunist: There are also cases of fish trained tricks, there appear to be more species of fish that can use tools compared to reptiles, and fish like moray eels and groupers are capable of interspecies cooperation.
Jan 29, 2023 4:11:52 GMT 5
Hammerhead: I would say about equal intelligence or give fish a slight edge.
Jan 28, 2023 19:07:33 GMT 5
Supercommunist: Any idea on which group of animals is more intelligent in general, fish or non-avian reptiles? I used to think that reptiles had the advantage but I noticed that there actually appears to be a lot more literature on fish intelligence so I am having doubts.
Jan 28, 2023 13:36:12 GMT 5
Hammerhead: It's working now!
Jan 18, 2023 18:39:15 GMT 5
Life: Clear your browser cache & cookies to see if it makes difference.
Jan 18, 2023 15:10:03 GMT 5
Hammerhead: "Is anyone else here getting “angry bear” proboards server issues?" Disregard this message.
Jan 18, 2023 3:22:24 GMT 5
Hammerhead: Is anyone else here getting “angry bear” proboards server issues?
Jan 15, 2023 23:11:00 GMT 5
Hammerhead: You’re most welcome.
Jan 14, 2023 3:06:19 GMT 5