Episode 515: New Silesaur and Tyrannosaurid Dinosaurs. The brand new silesaur Gondwanax was named from Southern Brazil and should present a transition between silesaurs and neornithischians; The brand new tyrannosaurid Labocania aguillonae helps solidify Labocania as a real tyrannosaurid; Plus a brand new enormous Pachyrhinosaurus cranium and a brand new Mesozoic swimming fowl.
Information:
- A brand new, big, Pachyrhinosaurus (ceratopsian) cranium nicknamed “Large Sam” was present in Northern Alberta, Canada supply
- There’s a brand new silesaur, Gondwanax paraisensis, from Southern Brazil supply
- There’s a brand new tyrannosaurid species, Labocania aguillonae, from Northern Mexico supply
- There’s a brand new euornithean fowl, Shuilingornis angelai, is among the earliest identified birds with semi-aquatic options supply
Sponsors:
The dinosaur of the day: Kwanasaurus
- Silesaur that lived within the Late Triassic in what’s now Colorado, U.S. (Eagle Basin of the Chinle Formation)
- Reconstruction seems to be much like Silesaurus
- Walked on all fours, had a protracted tail, a considerably lengthy neck, lengthy head
- Claws on the ft
- Additionally reconstructed with a pores and skin flap underneath the chin
- Had a beak
- Estimated to be in regards to the dimension of a medium sized canine
- About 4 to 5 ft lengthy (1.2 to 1.5 m) lengthy, and half the size is the tail
- Sort species is Kwanasaurus williamparkeri
- Present in an space identified for Late Triassic dinosaur fossils and different reptiles
- Silesaurids are essentially the most ample dinosauromorphs within the Eagle Basin
- Holotype features a partial higher jaw
- Different fossils discovered embody a number of decrease jaws, tooth, components of the hips, thigh bones, and an arm bone
- Took 20 years to gather the fossils (fragile materials, and laborious to excavate)
- Northernmost, youngest silesaurid present in North America
- A number of femora discovered (thigh bones), which may symbolize a variety of sizes and ontogenetic adjustments (progress collection)
- Named in 2019 by Jeffrey Martz and Bryan Small
- Genus identify comes from the Ute dialect and means “eagle” and refers back to the fossils being discovered at Eagle Basin, close to the cities Eagle and Gypsum
- Species identify is in honor of the writer’s pal and colleague Invoice Parker, “whose analysis has helped to drastically make clear our understanding of Late Triassic dinosauromorph variety within the western United States”
- Extra specialised herbivore than different silesaurids
- Kwanasaurus had “essentially the most excessive variations for folivory but identified inside Silesauridae” (for being an herbivore)
- Had a deeper, stronger cranium
- Had leaf-shaped tooth in addition to thick, “virtually durophagous” tooth (may eat animals with shells), and likewise had some rounded tooth
- See leaf-shaped tooth in early ornithischians, early sauropodomorphs, and a few theropods
- Often affiliate with being a plant eater (herbivorous)
- Had tooth in sockets that had been additionally fused to the encircling bone
- Had an alternating sample of tooth substitute (substitute tooth able to go and alternating between odd and even tooth positions)
- Had a brief, strong higher jaw (maxillae), in comparison with different silesaurids that had been extra slender
- Decrease jaw (dentary) additionally strong and had a ridge on it
- Could have had a comparatively highly effective chunk
- Perhaps ate harder meals than most different silesaurids, much like how herbivorous lizards advanced extra compact, highly effective skulls to eat robust, fibrous crops
- Entrance of the higher jaw is much like Lewisuchus and Silesaurus
- Lewisuchus was a basal silesaur that lived within the Late Triassic, present in Argentina, and had osteoderms on its again (named in 1972)
- Lewisuchus had tooth which will imply it ate meat (pointed serrated tooth, and likewise slender jaws)
- Extra derived silesaurs like Silesaurus had virtually conical tooth that weren’t that serrated and had a toothless beak, and based mostly on put on patterns on the tooth might have been herbivorous or omnivorous or ate bugs
- Silesaurids had been extensively distributed within the Late Triassic, in each moist and dry climates all around the world
- Based mostly on silesaurid tooth, might be partly profitable due to their capability to adapt to eat totally different meals
- However silesaurs appeared to get increasingly more herbivorous
- See this with sauropodomorphs too within the Late Triassic (convergent evolution)
- Different animals that lived across the similar time and place embody the pterosauromorph Dromomeron, the aetosaur Stenomyti (armored reptile that appeared like a crocodile and an armadillo), and coelophysids, and plenty of silesaurs
Enjoyable Reality:
Giant theropod dinosaurs might have thrived in polar environments.
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