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Elrathia cf marjumi Robison, 1964
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Products description
This Elrathia marjumi double from the Pierson Cove Formation does show the typical amount of 14 pleural segments (Elrathia kingi does have 13) but they do not show the typical hook of the pygidal rim.
The genus Elratia seems to be quite variable in the number body segments.
Pierson Cove Formation is mostly equal to Wheeler and mostly Marjum Formations and represent a shallower environment.
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| Location: | Drum mountains, Millard County, Utah, USA | |
Size: | about 5 mm long |
Age: | Mid. Cambrian, Pierson Cove Fm. (ca. 515 Mill. Jahre) (about 515 Mill. Jahre) |