Episode 508: Asiatyrannus, a T. rex-like Head on a Small Frame. Plus enamel from a brand new tyrannosauroid in northeastern Thailand, a brand new learn about on tyrannosaur chunk forces, an estimate for the biggest ever T. rex, a brand new fossil digitizing device, and our penultimate Di-Know-It-All Problem.
Information:
- There’s a brand new tyrannosaur, Asiatyrannus xui, with a shockingly deep cranium for a tyrannosaur of its dimension supply
- There’s proof of a brand new tyrannosauroid in northeastern Thailand supply
- A brand new learn about presentations how biting rigidity and pressure range in numerous sized tyrannosaurs supply
- Dinosaurs, like Tyrannosaurus rex, almost certainly were given so much larger than we’ve observed within the fossil document supply
- A brand new software makes it more straightforward for museums to digitize their fossils and proportion with folks all over the world supply
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Di-Know-It-All Problem:
You’ll be able to win a big Spinosaurus teeth, fossilized leaf, and extra through profitable our Di-Know-It-All Problem! Every week from episode 502 to 509 we’ll learn a puzzle at the display which you’ll be able to input to win through answering questions. This week you’ll be able to input at bit.ly/dinochallenge508 and for those who’re a patron you’ll be able to solution the shopper query at patreon.com/posts/110493197. The entire laws for the problem are at bit.ly/dinochallenge24
The dinosaur of the day: Kayentavenator
- Tetanuran dinosaur that lived within the Early Jurassic in what’s now the Navajo Reservation, Arizona, U.S. (Kayenta Formation)
- Tetanurans are theropods extra carefully comparable to fashionable birds than to Ceratosaurus
- Roughly gave the impression of Dilophosaurus, which is a coelophysoid
- Walked on two legs, had a protracted tail
- Paleoart depicts a crest on its head
- Roughly cumbersome
- Carnivorous
- Holotype is a juvenile, in line with some unfused bones
- Holotype is estimated to be 1.6 feet (0.5) m tall on the hip
- However, almost certainly grew larger
- In brief described in 2003
- Absolutely described in 2010
- Described in 2010 through Robert Homosexual, and title is legitimate, but it surely was once self-published in a e-book, so some controversy
- Kind species is Kayentavenator elysiae
- Genus title manner “Kayenta hunter”
- Species title elysiae is in honor of Rob’s now spouse, Elysia Jennett, who helped and supported his analysis
- Holotype (and best specimen) features a partial pelvis, thigh bones and shin bones, every other a part of the leg (proximal fibula) and 7 vertebrae
- 3 coelophysoids had been discovered within the formation: Dilophosaurus, Megapnosaurus or Coelophysis kayentakatae, and an unnamed coelophysoid referred to as the “Shake-n-bake” dinosaur (too small and has fused bones, so almost certainly an grownup, and wouldn’t be Kayentavenator)
- Labeled as a tetanuran, and now not a coelophysoid
- However there are many options in commonplace
- Had a hollow within the hip bones (pubic fenestrae), which units it aside from Dilophosaurus
- Additionally had distinctive options within the femur (higher thigh bone) and within the tail bones
- At the beginning assigned to Syntarsus kayentakatae (now Megapnosaurus kayentakatae, lined in ep 456)
- Fossils had been present in 1982, and Timothy Rowe referred to it as Syntarsus kayentakatae
- Timothy Rowe first named Syntarsus kayentakatae in 1989, in line with a cranium and partial skeleton (two different partial skeletons, or fragments of skeletons, additionally discovered)
- Species title in honor of Dr. Kathleen (“Kayenta Kay”) Smith, who discovered the fossils
- Not Syntarsus, as a result of that was once the title of a beetle first. Now it’s Megapnosaurus or Coelophysis
- Turns out not going that Kayentavenator is equal to Megapnosaurus kayentakatae, in line with variations within the hips and tibia (shin bone), however being named in line with fragments manner later findings may exchange this
- Some dialogue on whether or not Kayentavenator was once validly named, because it was once self-published
- One submit I discovered mentioned it just about is, for the reason that best solution to get a ruling on it’s if there’s a proper petition to stay the title, if somebody tries to call it one thing else
- Robert Homosexual expected the talk and addressed it in his e-book the place he printed the title Kayentavenator, the place he mentioned the paper was once reviewed through different paleontologists, and it was once submitted to a magazine at the beginning. Then again, reviewers requested for revisions and he was once not able to reply in a well timed method because of non-public problems, however he included the ones revisions within the e-book (which you’ll be able to obtain at no cost, or pay for a bodily reproduction)
- Additionally mentioned he sought after to retain copyright of his paintings, one more reason to self-publish
- Mentioned that the entire necessities for naming a brand new dinosaur had been met
- Some debate over Kayentavenator’s distinctive options, and whether or not they had been described appropriately, or if one of the most main points are because of particular person variation, which might have an effect on whether or not or now not Kayentavenator is regarded as to be a coelophysoid, like Coelophysis or Megapnosaurus
- A tweet in 2022 through Brian Engh mentioned paleontologist Adam Marsh is also operating on a redescription of Kayentavenator
- Lived in a space with wet summers and dry winters, with a number of streams, ponds, and lakes
- Different dinosaurs that lived round the similar time and position come with Dilophosaurus, Coelophysis, the sauropodomorph Sarahsaurus, heterodontosaurids, and the armored dinos Scelidosaurus and Scutellosaurus
- Different animals that lived round the similar time and position come with sharks, fish, frogs, turtles, lizards, pterosaurs, early mammals, crocodylomorphs, and synapsids, in addition to mussels and snails
A laugh Reality:
Fashionable birds deal with their small children in all kinds of the way, but it surely all turns out to have began with men being the one caregivers (which means, the ancestor of contemporary birds almost certainly did this taste of caregiving).
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