Episode 484: A New Spinosaurid and a Spinosaurus Swimming Replace. The newest spinosaurid, Riojavenatrix lacustris, was named from Spain; An replace on the swimming Spinosaurus debate; And a brand new mamenchisaurid was named “Jingia”, however a moth has that identify so it will likely be renamed quickly.
Information:
- There’s a brand new mamenchisaurid sauropod, “Jingia” dongxingensis, however it will likely be renamed quickly supply
- A brand new spinosaurid was named from Spain, Riojavenatrix lacustris, the “La Rioja huntress from the lake” supply
- A brand new paper provides to the controversy on how spinosaurs hunted and if/how they swam supply
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The dinosaur of the day: Walgettosuchus
- Tetanuran theropod that lived within the Late Cretaceous in what’s now New South Wales, Australia (Griman Creek Formation)
- Doubtful genus
- Solely identified from one tail bone (caudal vertebra, close to the top of the tail)
- Arduous to know what it seems to be like, based mostly on solely a tail bone
- However as a theropod, would have walked on two legs, had an extended tail, and sharp enamel
- Tail bone is about 2.5 in (6.4 cm) lengthy
- Tail bone is opalized
- Fossil present in 1905 by Tullie Cornthwaite Wollaston, an opal seller, in Lightning Ridge, close to Walgett, in New South Wales, Australia
- Briefly described in 1910 by Arthur Woodward, after the fossil was despatched to the British Museum of Pure Historical past
- Named in 1932 by Friedrich von Huene
- Kind and solely species is Walgettosuchus woodwardi
- Genus identify means “Walgett crocodile”
- Species identify in honor of Woodward
- von Huene thought it was a coelurosaur
- In 1990, Ralph Molnar discovered that the fossil couldn’t be distinguished from tail bones in ornithomimids or megaraptorids, and thought it was an indeterminate theropod and a nomen dubium
- Might be synonymous, or the identical as, Rapator, a theropod that lived across the similar time and place, that von Huene additionally named in 1932 (fossil is an opalized left hand bone)
- Don’t know for certain if they’re the identical dinosaur, as a result of can’t examine from only a hand bone and a tail bone
- Lived close to the coast by freshwater lagoons
- Different dinosaurs that lived across the similar time and place embody the iguanodontian Fostoria, the ornithopod Weewarrasaurus, ankylosaurs, enantiornithes, megaraptorans, and sauropods
- Different animals that lived across the similar time and place embody crocodyliformes, mammals, fish, pterosaurs, and turtles
- Formation the place the dinosaur was discovered has lots of opal
Enjoyable Reality:
We could have direct swimming proof of the brand new spinosaurid Riojavenatrix lacustris—the Rioja huntress from the lake (or it could possibly be from one other medium-sized theropod).
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