Episode 514: Spinosaurus biting, swimming, and strolling updates. Spinosaurids had highly effective sufficient jaws and tooth to go after giant prey, simply not sharp sufficient to take out bites. Plus, extra on the aquatic spinosaurs debate, and extra spinosaur updates.
Information:
- Spinosaurids had the cranium and tooth to go after giant prey supply
- As a substitute of crocodile mimics, possibly spinosaurs ought to be thought-about phytosaur mimics supply
- Spinosaurus had at the very least one different spinosaurine dwelling alongside facet it within the Kem Kem beds in Morocco supply
- A tooth in Thailand that was lengthy regarded as from an ichthyosaur was truly from a spinosaur supply
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The dinosaur of the day: Tachiraptor
- Theropod that lived within the Early Jurassic in what’s now Táchira, Venezuela (La Quinta Formation)
- Seemed quite a bit like different early dinosaurs
- Small dinosaur that walked on two legs, had shorter arms, had a protracted tail and lengthy head (based mostly on paleoart)
- Been in comparison with a puma in measurement
- Estimated to be about 4.9 ft (1.5 m) lengthy
- Shinbone was nearly 10 in (about 25 cm)
- Kind species is Tachiraptor admirabilis
- Genus identify means “thief of Táchira”
- Species identify refers back to the Admirable Marketing campaign of 1813, navy motion led by Simón Bolívar, with the aim of releasing Venezuela from Spain. An essential city was La Grita, which is the place the fossils have been discovered
- Described and named in 2014 by Max Langer and others
- Described based mostly on a tibia and ischium (shin bone and a part of the hip)
- Fossils in all probability got here from two people
- Holotype is the almost full proper shinbone
- Left ischium is broken
- Fossils discovered within the late Nineteen Eighties at a road-cut (digging roads)
- Discovered within the Mérida Mountains, the northernmost extension of the Andes mountain vary
- Present in an space with plenty of vegetation, so not many fossils have been discovered there (but)
- Particulars within the shinbone made it distinctive sufficient to be named a brand new dinosaur
- Discovered to be a basal neotheropod, which incorporates all besides the earliest theropods
- Additionally intently associated to Averostra, theropods that embrace birds
- Considered a stem-averostran, which implies it’s a part of the road that results in Averostra
- Don’t know a lot concerning the origin of Averostra, although they embrace most theropods
- Earlier than Tachiraptor, there was a protracted ghost lineage (no fossil proof) in Averostra
- Helps scale back the Averostra ghost lineage by 25 million years (no different confirmed stem-averostrans)
- Solely unequivocal theropod fossils discovered within the La Quinta Formation
- Lived in what was the equator of Pangaea
- Lived in a tropical lowland forest
- On the time Tachiraptor lived, Pangaea was splitting aside
- Lived about 201 million years in the past, simply after the tip Triassic mass extinction
- The equatorial belt the place it lived in all probability was essential for theropod evolution through the Triassic-Jurassic boundary
- Additionally discovered with fish and tooth from a carnivorous archosaur
- Most likely ate smaller animals, like small dinosaurs or lizards
- Possibly went after Laquintasaura, which was barely smaller
- Different dinosaurs that lived across the identical time and place embrace Laquintasaura (ornithischian, and first dinosaur present in Venezuela) and Perijasaurus (sauropod, and first dinosaur present in Colombia)
Enjoyable Truth:
Potential mountain dwelling dinosaurs have been discovered within the mountains of British Columbia, Canada.
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