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It has a prominent row of tubercles along the ventrolateral shoulder and another near the middle to the dorsal edge of the flanks
The ammonite is 11
It contains two currently recognized species
Marshosaurus bicentesimus with Allosaurus sp
There is a fish coprolite on the right leaf
Eocene Green River Unidentified Calyx P-PCM-16-084 Brittle Star It has a prominent rowUnidentified Calyx Green River Formation Parachute Creek Member Middle Eocene Uintah County, Utah This is a very well preserved but unidentified calyx. It has 4 sepals, but it appears that there are no petals present. The calyx is very coriaceous and has a heavy carbon residue of carbon. The upper part of the Green River Formation in the eastern Uinta Basin is present in two stratigraphic intervals separated by approximately 250 m of sandstone,
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