Sun, 29 September 2019
James, Brendan, Aly, Carlie, Anna, and Curt gather together at the 2019 Geological Society of America Meeting in Phoenix and discuss the various paleontology talks they saw at the event.
Day 1 (Anna, James, Curt, Brendan): 0:00 - 1:05
Day 2 (James, Aly, Carlie, Brendan, Curt): 1:05 - 2:37
Day 3 (James, Anna, Curt): 2:37 - 3:54
Day 4 (James, Carlie, Brendan): 3:54 - 5:17
Sun, 15 September 2019
The gang discusses some very interesting papers about bird fossils in New Zealand. These papers describe how many different types of birds ended up on New Zealand throughout the Cenozoic, and each time they experienced significant increases in their size. Sadly, since this was a very straightforward topic, no one could quite manage to focus on anything. So meanwhile, Curt remembers childhood animations that no one cares about, James makes it “fun” for himself and no one else, Amanda drinks the unholy combination of bourbon and rye (brye?), and everything just kind of gets way too 2019 near the end (EDITOR’S NOTE: Apologies for the inconsistent audio on this episode. The wrong inputs were used for some of the audio due to some last minute changes, but this should not happen in the future).
Up-Goer Five (Amanda Edition):
Today our friends talk about things with no teeth that can fly that can't actually fly and live on land that has water all around it. One of these things with no teeth that can fly but can't actually fly does sort of fly, but under the water instead of in the air. The other is a very large thing with no teeth that can fly but can't fly that people will have as an animal in their house a lot of the time. These things with no teeth that can fly that people keep in their house yell a lot and can also learn to talk. The one our friends talk about is just a leg, but it was very large and probably as big as a small child. The whole animal was that big, not the leg. The other thing with no teeth that can fly but can't fly but does sort of fly under the water is very big and very old and maybe is one of the oldest ones of these things with no teeth that can't fly anymore. It seems like maybe this land with water all around it was a good place for these early things with no teeth that can fly but now can't fly but sort of fly under water, because there are many of them there at this time. And they are very old, some of the oldest ones, and very big, so maybe being big is an old thing that this group of animals does.
Worthy, Trevor H., et al. "Evidence for a giant parrot from the Early Miocene of New Zealand." Biology letters 15.8 (2019): 20190467.
Mayr, Gerald, et al. "Leg bones of a new penguin species from the Waipara Greensand add to the diversity of very large-sized Sphenisciformes in the Paleocene of New Zealand." Alcheringa: An Australasian Journal of Palaeontology (2019): 1-18.
Sun, 1 September 2019
The gang discusses two very different papers that are sort of united together based upon the importance of taphonomy. First, they look at a paper about how the ways in which conodont elements are preserved can affect our understanding of their evolution. Second, they talk about the recent finding of exceptionally preserved therizinosaur dinosaur nesting sites. Meanwhile, Amanda finds herself dealing with a failing webcam, Curt enjoys burying the lede, and James is never wrong unless he wants to be.
Up-Goer Five (Curt Edition):
Our friends talk about how the ways that things wear down can really change how we understand our past. First, they look at these things that are like teeth but are not and are part of this very old group of animals that are aunt or uncle to a lot of animals that have hard parts in their backs which live today. Some of these old animals that have not teeth have changes through time in their not teeth. The bottom of these not teeth appears to disappear in the animals we find which are closer to today. However, this paper finds new animals that show maybe the bottom of these teeth have not actually disappeared, but instead it turns out that this bottom part is very easy to break off. This is important because it means that the not teeth may still have some deep relationship to how actual teeth teeth form.
Next, our friends look at the places where big angry animals would lay bag like things that hold babies, here after we will call them sit places. A big question has been if these big angry animals liked to find sit places close to each other or far away. It is hard to tell this in the past because we can't always be sure all of the sit places were used at the same time. This paper find a single red line that runs across all of the sit places, which allows the people who wrote the paper to say that all of the sit places were probably used at the same time. Also, the number of babies that didn't die is a lot like the number of babies that don't die in animals who also find sit places together today. So it looks like these big angry animals probably shared sit places.
Tanaka, Kohei, et al. "Exceptional preservation of a Late Cretaceous dinosaur nesting site from Mongolia reveals colonial nesting behavior in a non-avian theropod." Geology(2019).
Souquet, Louise, and Nicolas Goudemand. "Exceptional basal-body preservation in some Early Triassic conodont elements from Oman." Palaeogeography, Palaeoclimatology, Palaeoecology (2019).
Direct download: Podcast_170_-_The_Impact_of_Taphonomy_On_Conodonts_and_Dinosaur_Nesting_Sites.mp3
Category:general -- posted at: 3:00am EST