Episode 464: Dinosaur enamel! Tyrannosaur enamel in Yellowstone, spinosaur enamel in Early Cretaceous England, and extra. Plus Brian Engh joins to talk about his documentary collection at the Morrison Formation.
Information:
- The primary tyrannosaur enamel ever described from Yellowstone Nationwide Park supply
- Gadget finding out according to Maniraptoran enamel decided they had been round about 30 million years previous than in the past concept supply
- A enamel displays there have been extra spinosaurs within the Early Cretaceous in what’s now England supply
- There was once a various theropod neighborhood dwelling in what’s now southern Chile up till the Ok-Pg extinction match supply
Interview:
Brian Engh, a paleoartist and writer of the documentary collection Jurassic Reimagined. You’ll to find his paintings at dontmesswithdinosaurs.com on YouTube @DinosaursReanimated on Patreon at HistorianHimself and on twitter and Instagram @BrianEngh_Art
The dinosaur of the day: Eoabelisaurus
- Abelisaur that lived within the Heart Jurassic in what’s now Chubut Province, Argentina (Cañadón Asfalto Formation)
- Seemed reasonably very similar to Majungasaurus
- Walked on two legs, and had a protracted head, lengthy tail, cumbersome frame, robust legs, and brief hands
- In contrast to Majungasaurus, no head ornamentation discovered
- Had brief neck vertebrae
- Had 4 hands on each and every hand
- Had robust, strong legs
- Estimated to be as much as about 20 to 21 toes (6 to six.5 m) lengthy
- A later estimate discovered it to be 19 toes (5.8 m) lengthy
- Had heavy shoulder blades
- Identified for its very brief hands
- Sort and handiest species is Eoabelisaurus mefi
- Genus identify manner “morning time Abel’s lizard” and refers to the truth that it’s an early relative of Abelisaurus (mentioned Abelisaurus in episode 79)
- Species identify is in honor of MEF, the abbreviation for the Edigio Feruglio Museum of Palaeontology, the place Diego Pol, who discovered the fossils, is lively
- Diego Pol discovered the fossils in 2009
- Described in 2012 by way of Diego Pol and Oliver Rauhut
- Holotype features a just about whole skeleton with a cranium, of both a subadult or grownup (lots of the backbone, each legs and arms, portions of the cranium—lacking the entrance of the cranium, decrease jaw, finish of the tail, even though they did to find 27 tail vertebrae)
- The again part was once articulated
- First grouped as an abelisaurid, however later grouped as an abelisauroid
- Eoabelisaurus is helping display how abelisaurs developed
- Prior to Eoabelisaurus, the oldest identified abelisaurids weren’t widely recognized (handiest fragments), and handiest definitively identified from the Early Cretaceous
- Eoabelisaurus is helping display that abelisaurids had been round 40 million years longer/previous than in the past concept
- Abelisaurids had been bipedal carnivores, identified for his or her stocky legs and ornamentation on their skulls, like crests or horns
- They’d brief hands, steadily with out wrist bones, 4 stubby hands on their palms, brief however tall skulls, and plenty of had bony crests above their eyes
- They lived from the Heart Jurassic to the Overdue Cretaceous and feature been present in Africa, South The us, India, Madagascar, Portugal, and France
- Abelisaurs are most commonly identified from the Southern Hemisphere
- Abelisaurs had been the tyrannosaurs of the Southern Hemisphere
- Eoabelisaurus lived earlier than Gondwana break up off. Might be there was once a large wilderness that saved abelisaurids from going north
- Eoabelisaurus hands had been shorter like later abelisaurids, comparable to Majungasaurus, which lived on the finish of the Cretaceous
- Different abelisaurids from the Early Cretaceous had longer hands
- Eoabelisaurus’s higher arm was once longer than the decrease arm (higher arm was once in reality customary in measurement), which might imply abelisaurs began evolving shorter decrease hands first earlier than transferring directly to the higher arm
- Brief hands display that abelisaurids began getting shorter hands early of their evolution
- With its small hands, most definitely used its enamel extra to move after prey. More than likely had a formidable chunk
- Different dinosaurs that lived round the similar time and position come with theropods comparable to Asfaltovenator and Condorraptor, in addition to indeterminate spinosaurs, megalosaurs, and extra, sauropods comparable to Bagualia, Patagosaurus, and Volkheimeria, and ornithischians such because the heterodontosaurid Manidens
- Different animals that lived round the similar time and position come with mollusks, bugs, fish, amphibians, turtles, crocodylomorphs, pterosaurs, mammals
Amusing Truth:
Moths developed their proboscis to take care of the tough arid surroundings of the early Mesozoic—permitting them to drink water droplets like tears immediately from dinosaur eyes.
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