Palaeo After Dark

A group of scientists have biweekly informal discussions about evolutionary biology and palaeontology... over beer.

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Podcast 216 - Salty Tooth


The gang discusses two papers that look at ecological patterns in the Mesozoic. The first paper looks at ecomorphic trends in Triassic herbivorous tetrapods, while the second paper uses morphological and chemical evidence to estimate the behavioral patterns of Cretaceous mosasaurs. Meanwhile, James has ideas about electrolites, Curt has a 99% average, and Amanda manages to record an entire podcast while having vertigo (that last bit isn’t a joke).

 

Up-Goer Five (Amanda Edition):

Today our friends talk about where and how things live. The first paper looks at all kinds of animals with four feet that eat green things from the first part of the age of big angry animals with lots of teeth and no hair. This paper is trying to use the parts of the animal's face to see how they eat. There are different kinds of ways to eat green things, and some ways of doing things have more types of these animals with four feet than others. They also find that there are big changes that happen at some times in different groups of these animals. The second paper is really cool and looks at big angry animals with hard skin that go back to the water. This paper shows that these big angry animals, which live in water that isn't good to drink, sometimes go to places where there is more water that is good to drink. Some go back to water that is good to drink every 4 to 7 days if they live in one place, or 12 to 20 days if they live in the other place. It is possible that these big angry animals with hard skin that go back to the water might have also gone from top of the world towards the middle of the world over longer times, and back again, like animals with light bodies and no teeth and no hair, but they are not sure here, they need to look more.

 

References:

Taylor, Leah Travis, et al. "Oxygen  isotopes from the teeth of Cretaceous marine lizards reveal their  migration and consumption of freshwater in the Western Interior Seaway,  North America." Palaeogeography, Palaeoclimatology, Palaeoecology 573 (2021): 110406.

Singh, Suresh A., et al. "Niche partitioning shaped herbivore macroevolution through the early Mesozoic." Nature communications 12.1 (2021): 1-13.


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 2021-07-18  2h12m