Podcast 286 - Dinosaurs, Sabertooths, and Mojitos; Oh My!
Release Date: 06/16/2024
Palaeo After Dark
Wet Hot Archosaur Summer continues as the gang discusses two papers about crocodylomorph evolution. The first paper looks at the impact mass extinctions had on disparity within the group, and the second paper uses new phylogenetic data to revise our understanding of size trends and biogeography of crocodylomorphs during the Cenozoic. Meanwhile, Curt invents a measurement, James invents a new way of eating, and Amanda invents a new phobia for herself. Up-Goer Five (Curt Edition): The friends talk about two papers that look at big angry animals that you should never smile at, again! This...
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The gang kicks off a summer of archosaurs by talking about crocodyliforms. The first paper describes an early Cenozoic large notosuchian, and the second paper investigates how cryptic species impacts divergence times within the clade. Meanwhile, Curt diagnoses a problem, James tries to “help”, and Amanda does not care. Up-Goer Five (Curt Edition): The friends talk about two papers that look at animals that today most of the time live in water and grab food from the edge of the water and you should never smile at. The first paper a really big one of these animals that lived a long...
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The gang tries to discuss two papers that look at the evolutionary impacts of the K-Pg mass extinction. Specifically, they look at one paper that estimates sampling probability throughout the late Cretaceous to determine if record bias influences our understanding of the extinction, and another paper that looks at species area relationships to investigate ecological shifts in response to the event. However, the gang gets completely lost and sidetracked throughout. They starting talking about the papers around 18 minutes in… and very quickly lose track again. It’s going to be one of those...
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The gang discusses two papers that look at the evolutionary impact of shifts in habitat occupation. The first paper looks at a clade of sharks moving into the depths, and the second paper investigates habitat shifts in mammals across the Cretaceous and Paleogene. Meanwhile, Amanda has some opinions, James is doing much better, and Curt is easy to amuse. Up-Goer Five (Curt Edition): The friends talk about two papers that look into how animals change when they move from one type of place to another. The first paper looks at animals with big teeth that has soft parts inside and live in...
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The gang discusses two papers that use morphometrics to investigate patterns of selection on bird morphology. The first paper looks at the morphology of feathers, while the second paper looks more broadly at various parts of the avian body. Meanwhile, James breathes new life into a classic, Amanda is passionate about formatting, and Curt exposes “the truth”. Up-Goer Five (Curt Edition): The friends talk about two papers that look at animals that move in the air. Both of these papers look at how these animals look and try to find out why these animals look the way they do. The first...
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The gang discusses two papers that look at preserved skin/external tissues. The first paper shows a unique record of Cambrian molting, and the second paper looks at the first preserved samples of plesiosaur skin. Meanwhile, Amanda commits an "own goal”, Curt shares some old internet fun, and James has opinions about fins. Up-Goer Five (Curt Edition): The friends talk about two papers that look at skin that is very very very old. The first paper looks at animals from a long time ago that lose their skin when they get too big for it when then grow. They found these parts on the skin...
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The gang discusses two papers that look into the evolution and timing of key morphological innovations within animal groups. The first paper describes possible raptorial appendages in fossil artiopods, and the second paper finds early evidence of modern bird morphologies in the Jurassic. Meanwhile, Amanda gloats, Curt dies, and James eulogizes. Up-Goer Five (Amanda Edition): Today our friends look at two papers where one friend can feel better about how they do the work than how other people do the work. One paper is about big face hand animals with many parts to their legs that use...
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The gang discusses two papers that look into the timing of evolution of the “crown group”. The first paper looks at fossil glass sponges, and the second paper looks at the phylogeny of lampreys. Meanwhile, James gives some sound advice, Amanda has ambitious hobby plans, and Curt imagines the perfect media crossover. Up-Goer Five: (Curt Edition) The friends talk about two papers that look at groups of animals and try to see when the things that we see today in these groups may have first happened in the past and what we can tell us about why those things might have happened. The...
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The gang celebrates the research of the late Elisabeth Vrba by talking about two of her papers, as well as her research more broadly. And, despite their best efforts, they get easily distracted on tangentially related side discussions. Up-Goer Five (Curt Edition): The friends talk about two papers from someone who they want to remember the memory of because that person is no longer with us. They talk a lot about this person's work, and some other things that come up as they are talking. The big things these two papers look at are how small things working together can build things that...
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The gang discusses two papers that look at some exceptional soft-tissue preservation during the Silurian. The first paper potentially identifies a unique type of pterobranch, and the second paper looks at some early molluscs. Meanwhile, James has seen some movies, Amanda has a skibidi day, and Curt’s soul dies. Up-Goer Five (Curt Edition): The friends talk about two animals from a long time ago that are only found as soft parts and that makes it hard to find the parts of them that were in the ground a long long time ago. The first paper looks at an animal that is not well known in...
info_outlineThe gang discusses two papers that study ecological changes in the evolutionary history of some charismatic ancient animal groups. The first paper uses geographic data to infer the timing of the evolution of homeothermy in non-avian dinosaur groups, and the second paper looks at the mechanisms by which cats (and cat-like animals) developed saber teeth. Meanwhile, Curt makes some plans for Amanda, James muddles things over, and Amanda could use another.
Up-Goer Five (Curt Edition):
The friends talk about two papers that look at how where animals live can change how they look and also maybe how they look can change where they can live. The first paper looks at old big angry animals and where they live to see if they can find when these animals were able to make themselves warm inside. We have other things that make us think that some of these big angry animals may have been able to get warm inside, but that this might have happened a few times in this group. By looking at where these animals were found in the past, they see that there are times when these animals move into places that are colder. They use this to say that these times may be because these animals now being able to make themselves warm inside.
The second paper looks at animals that are cats and cat like animals. Some of these cats and cat like animals have very long teeth. This paper does a lot of things to study how these cats and cat like animals change their heads when they get these big teeth. They find that some of these cat like groups do this in a different way than cats, but also that cats start to change their heads to be a bit more like the cat like things when they get bigger teeth but also not in the same way.
References:
Chiarenza, Alfio Alessandro, et al. "Early Jurassic origin of avian endothermy and thermophysiological diversity in Dinosauria." bioRxiv (2023): 2023-12.
Chatar, Narimane, et al. "Evolutionary patterns of cat-like carnivorans unveil drivers of the sabertooth morphology." Current Biology (2024).