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.
hypezephyr: IN DROWN, WATER WILL CHIMPS
May 27, 2021 22:33:21 GMT 5
kekistani: IN WATER, CHIMPS WILL DROWN.
Mar 18, 2021 11:18:01 GMT 5
roninwolf1981: I wonder why is it that the greater apes would drown if they fell into water from the trees?
Mar 16, 2021 22:25:11 GMT 5
kekistani: The virgin and bluepilled Mokele Mbembe versus the CHAD and REDPILLED Water Elephant
Mar 4, 2021 22:31:57 GMT 5
Ceratodromeus: Considering even the most terrestrially inclined extant crocodilians are also very good swimmers, i see zero reason for sebechids to not be.
Feb 25, 2021 21:09:18 GMT 5
Infinity Blade: Virtually every terrestrial animal can swim if it needs to. I don't know about tail flexibility, though.
Feb 21, 2021 22:17:14 GMT 5
jhg: Probably not. Terrestrial crocodiles stayed on land for a good reason.
Feb 21, 2021 11:17:16 GMT 5
Supercommunist: Do you think sebecids and other crocodile-like terrestrial animals were good swimmers and if so, would they have used their tails to swim or would they have been too stiff?
Feb 21, 2021 6:16:35 GMT 5
Infinity Blade: Welcome to World of Animals.
Jan 31, 2021 5:06:24 GMT 5
Supercommunist: Any idea how well pterosaurs would have fared in extremely cold climates? I can't help but assume that their wing membranes would be more vunerable to frostbite than a bird's wing.
Jan 23, 2021 9:38:14 GMT 5
Supercommunist: Turns out there is a study: www.nature.com/articles/s41598-017-08812-2 fresh bones provided 63% more energy than dry bones but what I find intresting is that dry bones that are between 3-12 months old is still a viable food source for them.
Jan 4, 2021 9:18:34 GMT 5
Infinity Blade: I think they might get calcium from the bones, but those might be harder to digest as well. For bone marrow, I'd say however long it's around before it completely decays.
Jan 4, 2021 6:23:06 GMT 5
Supercommunist: Question: I know a bearded vulture's diet consists mainly of bone marrow, but are they able to derive nutritional value from old bones or do the bones have to be relatively fresh?
Jan 4, 2021 2:59:21 GMT 5
Infinity Blade: Happy New Year mudda fuggas.
Jan 1, 2021 10:02:06 GMT 5