Tuesday, January 19, 2016

Crurithyris sp.? brachiopod from the Chainman formation of Utah

This next brachiopod looks very similar to a genera called Crurithyris that is present in the Pennsylvanian. I can't locate any literature or examples from the Chainman formation at Conger Springs, Utah that indicate this could be any other genera. So I am tentatively labeling this as Crurithyris sp. The shell is small, wider than long with a very convex pedicle valve and a slightly convex brachial valve. The valves are smooth with no obvious ornamentation. The pedicle valve recurves back over the interarea and the margins of the valves are flat with no evidence of a fold or sulcus.

Brachial valve
Pedicle valve

This specimen came from the Chainman formation at Conger Springs (west of Delta), Utah and is Carboniferous (Mississippian epoch, Visean stage of the ICS or Mississippian period, Chesterian stage in the US) in age.

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