Episode 210 is all about Yangchuanosaurus, an Allosaurus-sized carnivore from the Jurassic of Sichuan, China.
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On this episode, we talk about:
Information:
- A New Ceratopsid Dinosaur, Crittendenceratops, was found in Arizona supply
- A brand new Chinese language titanosauriform, Liaoningotitan, was thankfully named the identical as mounts which have already gone on show supply
- Amphicoelias fragillimus was renamed Maraapunisaurus fragillimus after a reanalysis confirmed it wasn’t almost as giant as beforehand thought supply
- A physician in Texas received to maintain his Tarbosaurus cranium after a decide discovered that the US authorities took too lengthy to file forfeiture paperwork supply
- Two Drugs Dinosaur Heart, in Bynum Montana, is constructing a Amphicoelias (now Maraapunisaurus) measuring 136ft lengthy supply
- The Pure Historical past Museum of LA is getting the touring exhibition Antarctic Dinosaurs on April 3 supply
The dinosaur of the day: Yangchuanosaurus
- Yangchuanosaurus was a metriacanthosaurid theropod that lived within the Jurassic in what’s now China
- Similar to Allosaurus
- Cranium of the sort specimen was 2.7 ft (82 cm) lengthy
- Kind specimen estimated to be about 26 ft (8 m) lengthy
- A referred specimen was estimated to be as much as 35.4 ft (10.8 m) lengthy
- Had ahead going through eyes
- Largest predator in its habitat
- Different dinosaurs that lived on the similar time and place embrace sauropods Mamenchisaurus and Omeisaurus, stegosaurs Chialingosaurus, Tuojiangosaurus, and Chungkingosaurus
- Had a bony ridge on the nostril, and had hornlets and ridges, like Ceratosaurus
- Bipedal, with brief arms, a robust neck, and a big head with poweful jaws and serrated tooth
- Had an extended tail, that was about half its size
- Toes had three toes with a big claw and a smaller fourth toe
- Title means Yangchuan lizard
- Named in 1978 by Dong and others
- Named after Yongchuan, the world in China the place it was discovered (Yongchuan District, Sichuan)
- Discovered within the Shaximiao Formation
- Present in June 1977 by Sinung Chen, who was main the Daba Reconstruction Public Works Corps to renovate the Daba Dam on the Shanyou Reservoir
- Discovered an entire cranium and skeleton
- Kind species is Yangchuanosaurus shangyouensis?
- Species title refers back to the Shangyou Reservoir Dam
- Cranium of kind specimen was fully preserved
- First almost full dinosaur skeleton, present in China
- Dong and others described the second species from the identical space in 1983, Yuangchuanosaurus magnus, based mostly on an entire cranium and skeleton (named a separate species primarily due to the dimensions distinction and since the 1983 specimen had one other fenestra within the cranium)
- In 2012, Carrano, Benson, and Sampson discovered that each species had been the identical species, and the variations might have been ontogenetic (totally different development phases)
- In 1988 Gregory S. Paul prompt Yuangchuanosaurus to be the identical as Metriacanthosaurus, however most individuals don’t agree
- In 2012 Carrano and others assigned a 3rd specimen to Yuangchuanosaurus shangyouensis (discovered a partial postcranial skeleton with out a cranium, within the Wujiaba Quarry close to Zigong metropolis in Sichuan, as a part of the Shangshaximiao Formation)
- It was present in 1978 and listed as a brand new species of Szechusanosaurus, referred to as Szechuanosaurus yandonensis, however there’s no description or illustration, so it was a nomen nudum. In 1983 Dong and others described it as Szechuanosaurus campi (however Szechuanosaurus is a doubtful species, identified solely from 4 tooth)
- In 2012, Carrano and others stated the specimen couldn’t be assigned to Szechuanosaurus as a result of the holotype had no diagnostic traits, plus the specimen didn’t have any tooth preserved (and couldn’t be in contrast with the 4 tooth of the holotype)
- In 2001 Dan Chure discovered that specimen was a nex taxon, informally generally known as Szechuanoraptor dongi, and that the third species of Szechuanosaurus, Szechuanosaurus zigongensis must also be grouped with it (Szechuanosaurus zigongensis was first described in 1993 by Gao)
- The 2012 Carrano research discovered that very same third Yuangchuanosaurus specimen and Szechuanosaurus zigongensis couldn’t be the identical species as a result of they’d no shared distinct options, and Szechusanosaurus zigongensis got here from the Xiashaximiao Formation, which is the decrease a part of the Shangshaximiao Formation. A phylogenetic evaluation discovered the third specimen to be most intently associated to Yuangchuanosaurus shangyouensis, so it was assigned to that species
- Szechuanosaurus zigongensis was discovered to be intently associated, and have become the second species of Yuangchuanosaurus, Yuangchuanosaurus zigongensis
- 4 Yuanchuanosaurus zigongensis specimens have been discovered (contains tooth, hing limbs, and extra), from the Xiashaximiao Formation within the Dashanpu Dinosaur Quarry
- Additionally probably a 3rd species of Yangchuanosaurus, Yangchuanosaurus hepingensis (named by Gao in 1992), however this will now be thought-about to be Sinraptor
- Yangchuanosaurus fossils had been virtually misplaced in a flood in 1981, when water rose and coated the laboratory ground on the Chongqing Museum of Pure Historical past in China. Technicians had been able to swim to save lots of the fossils, however the waters receded in time
Enjoyable Reality:
Backyard Park, Colorado (about 30 miles SW of Colorado Springs) is likely one of the websites the place Cope & Marsh each funded quarries through the Bone Wars. It’s additionally house to “Cope’s Nipple” the place Camarasaurus was discovered.
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