Episode 364 is all about Palaeoscincus, the “historical skink” that was named after a single tooth, however is now thought of doubtful.
We additionally interview Sterling Nesbitt, an affiliate professor at Virginia Tech within the Division of Geosciences, a analysis affiliate/affiliate of quite a lot of museums, who has over 100 publications specializing in the origin of dinosaurs and their early evolution.
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On this episode, we talk about:
Information:
- Hadrosaur beaks, Hesperornis, & Ichthyornis talks from the Avialan Evolution & Biology session at SVP 2021 supply
- A current paper has tips about staying secure whereas conducting subject work supply
- A brand new listing of sources has suggestions for LGBTQA+ paleontologists and college students supply
- One other listing of sources has suggestions for caring for your psychological well being supply
- Dippy is headed again to the Pure Historical past Museum in London from Summer time 2022 via December 2022 supply
- The American Heritage Heart in Wyoming has a digital duplicate of the Triceratops from the unique King Kong film supply
- The Buffalo Museum of Science in New York may have the touring exhibit Antarctic Dinosaurs beginning in February supply
- Flint Hills Discovery Heart in Kansas has the exhibit Dinosaur Discoveries: Historic Fossils, New Concepts till January 2nd supply
- The Royal Tyrrell Museum in Alberta, simply obtained 5 Guinness World Data for his or her fossil collections (largely dinosaurs) supply
The dinosaur of the day: Palaeoscincus
- Doubtful ankylosaur that lived within the Late Cretaceous in what’s now Montana, US (Judith River Formation)
- Seems to be like different ankylosaurs, usually depicted with armor like Edmontonia with spikes alongside the edges of the physique and a tail membership
- In all probability had a low, broad physique, and stout limbs
- Herbivorous
- Kind and solely species is Palaeoscincus costatus
- Genus title means “historical skink”
- Species title means “the ribbed one”
- First ankylosaur named based mostly on fossils discovered within the U.S.
- Named by Joseph Leidy in 1856 based mostly on one tooth
- Tooth discovered by Ferdinand Hayden
- Joseph Leidy, 1856 wrote “Discover of stays of extinct reptiles and fishes, found by Dr. F. V. Hayden within the Dangerous Lands of the Judith River, Nebraska Territories”
- Two paragraphs about Palaeoscincus, contains: “The fang is flattened cylindrical and is hole”
- Leidy described it extra in 1859
- O.C. Marsh wrote in 1892, “Notes on Mesozoic vertebrate fossils”
- Marsh mentioned “many related enamel have since been discovered, each within the Judith Basin and in varied different localities of the Laramie”
- Mentioned a smaller species present in Wyoming, and known as it Palaeoscincus latus
- Mentioned the crown of the tooth was broader and the apex extra pointed
- Additionally mentioned a tooth Cope described in 1882 as a mammalian premolar and the kind of Meniscoessus belongs to Palaeoscincus or one thing related
- Walter Coombs Jr. in 2010 wrote, “Enamel and taxonomy in ankylosaurs”
- Mentioned there have been 5 sources of dinosaur enamel variation: positional, ontogenetic, intraspecific, taxonomic, and chimeric
- Examples of positional variation embrace tooth measurement, variety of cusps, the place within the dental row the tooth is from, and ornamentation, corresponding to grooves or ridges or serrations
- Mentioned enamel are hardly ever analyzed with sufficient element to call a brand new taxon based mostly on enamel
- Mentioned Palaeoscincus costatus is a nomen dubium, as a result of not sufficient element to inform the distinction based mostly on its tooth
- Different Palaeoscincus species which have since been reassigned:
- Palaeoscincus africanus, named in 1910/1912 by Robert Broom based mostly on a partial jaw discovered within the Kirkwood Formation of South Africa, now often called the stegosaurid Paranthodon
- Palaeoscincus asper, named by Lawrence Lambe in 1902 (means “the tough one”), based mostly on a tooth present in Dinosaur Park Formation in Alberta, Canada. Now thought of to be Euoplocephalus
- Palaeoscincus latus, named by O.C. Marsh in 1892 (means “the extensive one”) based mostly on a tooth discovered within the Lance Formation in Wyoming. Now regarded as a pachycephalosaurid
- Palaeoscincus rugosidens, named by Charles Whitney Gilmore in 1930 (means “tough tooth”), based mostly on a cranium and partial skeleton discovered within the Two Drugs Formation in Montana. Now regarded as Edmontonia or Chassternbergia (most illustrations based mostly on this one)
Enjoyable Reality:
The “duck take a look at” is incorrect and the Digesting Duck automaton can’t digest something.
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