Скачать или смотреть Episode 274: Big Al is no longer Allosaurus fragilis

In dinosaur news this week: Big Al is now Allosaurus jimmadseni and no longer Allosaurus fragilis; A new set of sauropod tracks in Texas could be swim tracks—or maybe not; Storm Ciara in the UK uncovered a new 130 million year old dinosaur footprint; Colin Trevorrow shared a video of what looks like a Nasutoceratops puppet from Jurassic World 3

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This episode was originally published on February 26, 2020 at https://iknowdino.com/Haplocanthosaur...

This week's dinosaur of the day is Haplocanthosaurus
Sauropod that lived in the Late Jurassic in what is now Colorado, US, and possibly Wyoming (Morrison Formation)
Rare sauropod in the Morrison Formation
One of the smallest sauropods from the Morrison Formation
Estimated to be about 49 ft (14.8 m) long and weigh 13 tons
Relatively small bodied and relatively short tail
No skull found, which makes it hard to classify (may be a close relative of Camarasaurus?)
Mostly found vertebrae
Some debate over phylogeny but a 2015 study found it to be a diplodocoid
Two species: Haplocanthosaurus priscus (type) and Haplocanthosaurus delfsi
Genus name means "simple spined lizard"
First described from specimens collected at the Marsh-Felch Quarry in Colorado
John Bell Hatcher was recently appointed curator of vertebrate paleontology at the Carnegie Museum in 1901, and reopened the Marsh-Felch quarry in Garden Park, Colorado, where he and his team found two medium-sized, partial skeletons of Haplocanthosaurus priscus
Hatcher named Haplocanthosaurus in 1903, as Haplocanthus. But four months later changed the name to Haplocanthosaurus because Haplocanthus was "essentially preoccupied" (it was the name of a fish that Louis Agassiz named in 1844)
However, the fish was spelled "Haplacanthus", not "Haplocanthus"
Turns out Hatcher didn't need to rename the dinosaur. Because the spelling of the fish was different, the name Haplocanthus was valid, until a petition was sent to the ICZN and they ruled in 1991 that Haplocanthosaurus was the correct name because of widespread use (like how they ruled that T. rex was the valid name)
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read more at https://iknowdino.com/Haplocanthosaur...

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