Episode 214 is all about Thecodontosaurus, a Triassic sauropodomorph found in 1830s England.
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On this episode, we talk about:
Information:
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The dinosaur of the day: Thecodontosaurus
- Sauropodomorph that lived within the Triassic in what’s now England
- Small, bipedal
- About 3.9 ft (1.2 m) lengthy, weighed about 24 lb (11 kg)
- Largest ones estimated to be 8.2 ft (2.5 m) lengthy
- Had a brief neck and huge cranium, with massive eyes
- Entrance limbs have been shorter than hindlimbs
- Fingers have been lengthy and slim, and had a big claw on every
- Had 5 digits on its fingers and toes
- Tail was longer than the remainder of the physique
- Had highly effective again legs, might attain low hanging tree branches
- Perhaps might have swam? Used its tail as a rudder and powerful limbs for swimming
- Lived on a tropical island
- Herbivorous
- Had serrated, leaf-shaped enamel
- Sharp enamel might tear up leaves
- Initially considered carnivorous
- Title means “socket-tooth lizard”
- Present in 1834 on the Durdham Down quarry
- Initially described and named in 1836
- One of many first dinosaurs found (fourth or fifth named dinosaur, although Dinosauria as an idea didn’t exist till 1842)
- Thecodontosaurus was at first considered a bizarre reptile that was much like each lizards and crocodiles
- Quarry staff discovered “saurian animals” stays in Bristol’s limestone quarries. They took some bones to the Bristol Establishment for the Development of Science, Literature and Arts, so Samuel Stutchbury might see them. He was away, so his colleague Henry Riley took a glance. When Stutchbury got here again, he requested for extra specimens. David Williams, a rustic parson and geologist, was aso excited. So there was a race between Williams and Stutchbury and Riley to explain the bones.
- Stutchbury and Williams didn’t belief one another (Williams thought Stutchbury was egocentric in making an attempt to get all of the fossils to the Bristol Establishment, and Stutchbury thought Williams was making an attempt to poach fossils). They each labored on descriptions of the dinosaur. Nevertheless, Williams didn’t have as many fossil materials as Riley and Stutchbury so he didn’t attempt to flip his report in 1835 right into a reliable description of the animal. Riley and Stutchbury named Thecodontosaurus and gave a brief description in a chat in 1836 then completed their paper in 1838 and revealed in 1840
- Title refers back to the roots of the enamel not being fused with the jaw bone however as a substitute in separate tooth sockets (like trendy lizards)
- Initially Riley and Stutchbury although it was a member of Squamata (lizards and snakes). Owen didn’t take into account it to be a dinosaur (assigned it to Thecodontia in 1865). Then in 1870 Thomas Huxley discovered it was a dinosaur, although thought it was a Scelidosauridae. Trendy evaluation continues to be not conclusive (typically seen as a basal sauropodomorph, or might have come earlier than the prosauropod-sauropod cut up)
- Just one legitimate species, the sort species Thecodontosaurus antiquus (although many different species have been named)
- Species named in 1843 by John Morris, in his catalogue of British fossils
- Species title means “historic” in Latin
- Holotype consists of a decrease jaw
- Holotype was destroyed in WWII in November 1940 throughout the Bristol Blitz
- Some bones survived (184 at the moment are a part of the Bristol Metropolis Museum and Artwork Gallery, and extra fossils have been later discovered close to Bristol at Tytherington)
- About 245 fragmentary specimens are presently identified
- Peter Dalton assigned one other decrease jaw because the neotype in 1985
- Numerous different misassigned species, some now thought-about to be different genera, some are doubtful
- Riley and Stutchbury additionally discovered some carnivore enamel that they named Paleosaurus cylindrodon and Paleosaurus platydon. Within the late 1800s, there was a concept that they have been from carnivorous prosauropods, with comparable our bodies to Thecodontosaurus however with enamel that would slice. Arthur Smith Woodward named Thecodontosaurus platydon in 1890 based mostly on this, and Friedrich von Huene named Thecodontosaurus cylindrodon in 1908, however now they’re each not thought-about legitimate
- As soon as, Thecodontosaurus fossils have been mistakenly described as a unique genus. In 1891, Harry Govier Seeley named Agrosaurus macgillivrayi. He thought the fossils present in 1844 that got here from the northeast coast of Australia. Nevertheless it was foun in 1999 that Riley and Stutchbury in all probability despatched these bones to the British Museum of Pure Historical past and have been mislabeled. (In 1906, Friedrich von Huene mentioned they have been much like Thecodontosaurus and named the species Thecodontosaurus macgillivrayi. Now it’s thought-about a junior synonym of Thecodontosaurus antiquus.
- A part of the Bristol Dinosaur Undertaking, which for ~4 years 1000’s of volunteers helped collect and protect its fossils (numerous lab, analysis, and outreach work)
Enjoyable Reality:
From episode 180: Stegosaur plates type from the identical osteoderms that make up the armor on ankylosaurs
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This episode is dropped at you partially by TRX Dinosaurs, which makes lovely and practical dinosaur sculptures, puppets, and animatronics. You may see some wonderful examples and works in progress on Instagram @trxdinosaurs
And by Indiana College Press. Their Lifetime of the Previous collection is lavishly illustrated and meticulously documented to showcase the newest findings and most compelling interpretations within the ever-changing area of paleontology. Discover their books at iupress.indiana.edu