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Here's what I have. The "Chure et al. (1997)" reference is an SVP abstract
(and I bet I'm not the only one looking forward to the full publication).
Marshosaurus is a medium-sized theropod (estimated body length 5-6m), and
one of the lesser-known predators among the Morrison dinofauna. Two partial
skeletons are known for this theropod, including the fragmentary type
specimen (from Cleveland-Lloyd Quarry) and a better specimen (from Dinosaur
National Monument West) discovered in 1912 but not studied until the
mid-1990's. Based on this new material, Marshosaurus appears to be some
form of avetheropod.
Marshosaurus retains many features considered primitive - such as the long
braincase (which puts Marshosaurus in stark contrast to the very
short-braincased Stokesosaurus); rectangular-shaped lateral temporal
fenestra; thick-walled centra with a camerate pneumatic structure; bowed
pubic shaft ending as a small boot with no anterior expansion; and a long,
low ilium (Chure et al., 1997). Marshosaurus exhibits a number of derived
features, including inclined axial intercentum (also seen in Sinraptor);
tall cervical apophyses nearly as tall as the neural spines; opisthocoelous
cervicals; a moderately expanded scapular blade; and an open obturator notch
(Chure et al., 1997). The humerus is short and massive, suggesting
proportionately short but powerful forelimbs (Chure et al., 1997).
Genus: Marshosaurus Madsen, 1976
Species: M. bicentesimus Madsen, 1976 (type)
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