Wet Hot Archosaur Summer continues as the gang discusses two papers that look at the evolution and biogeography of early archosaurs. Specifically, one paper describes new material from an early dinosaur group, and the other paper looks at the niche preferences of early pterosaurs and their closest sister group, the lagerpetids. Also, James tries out a new flavor, Curt likes consistency, and Amanda provides some ASMR.

Up-Goer Five (Curt Edition):

The friends look at two papers about the early types of animals that would give us lots of different types of big angry animals like the big ones that everyone thinks of and the ones that can fly. The first paper looks at one of these early animals which we don't know much about because there is not a lot of it left. This paper talks about some new stuff that was found which helps us better know what this animals is. We first thought that maybe it was one of the earliest animals, but this paper says that it may be more like some of the big animals that we talk about all the time because they are in big movies like the one that came out this year.

The second paper looks at two groups of animals that are close to each other, one of them can fly and one that does not fly. These two groups were around at the same time. This paper looks to see where they lived and what types of places they wanted to live in. They find that these two groups did live sort of the same place, but places where the things that fly would like to live were also places that the other group that did not fly did not like to live as much. The other thing they find is that, even though the group that did not fly was not as long lived as the group that did fly, during the time they are looking at it lived in a lot of places and did very well. A big bad thing happened at the end of this time that is probably why this group went away and the group that could fly was able to do better.

References:

Müller, Rodrigo Temp. "A new “silesaurid” from the oldest dinosauromorph-bearing beds of South America provides insights into the early evolution of bird-line archosaurs." Gondwana Research 137 (2025): 13-28.

Foffa, Davide, et al. "Climate drivers and palaeobiogeography of lagerpetids and early pterosaurs." Nature Ecology & Evolution (2025): 1-14.

The gang discusses two papers about the ecology of sauropods. The first paper investigates the biomechanics of the Plateosaurus tail, and the second paper looks at direct evidence of sauropod diet from gut contents. Meanwhile, James “makes it interesting”, Amanda may have recorded on the wrong microphone, Curt makes a bold rebrand, and everyone vaguely remembers “Denver: The Last Dinosaur”.

Up-Goer Five (Curt Edition):

The friends talk about two papers that look at animals with along necks from a long time ago that kids love and were in a movie where one of them called Little Foot went to a great low place between big places. The first paper looks at one of the oldest groups of animals with long necks that had really long things coming out of their bottoms. Some animals use these long things to match how heavy and long their necks are, but some use these long things to hit other animals. Since this group did not have a lot of things to hit other animals that may try to eat them, it would make sense that maybe they used their long things off their bottom to do it. They look at other animals from today and the past to see if this animal could use its long thing from its bottom to hit other animals. And they find that it could.

The second paper looks at what one of these long neck animals would eat. They find some parts of one of these animals that died when it was eating, and the bits that it ate were still in its body when it died. They find bits and pieces of things that can make their own food, and they also find that the animal was not very good at breaking up its food in its mouth.

References:

Poropat, Stephen F., et al. "Fossilized gut contents elucidate the feeding habits of sauropod dinosaurs." Current Biology 35.11 (2025): 2597-2613.

Filek, Thomas, et al. "Tail of defence: an almost complete tail skeleton of Plateosaurus (Sauropodomorpha, Late Triassic) reveals possible defence strategies." Royal Society Open Science 12.5 (2025): 250325.