Crurithyris planoconvexa (Shumard, 1855)

  
Crurithyris planoconvexa (Shumard, 1855)

General abundance:  Common

Crurithyris planoconvexa (Shumard) is a small species
of brachiopod that rarely exceeds 6 or 7 mm along
the hinge line. It has a highly inflated pedicle valve and
a nearly flat brachial valve. This species is often very
abundant when it is found.

The above description is from the following web site.
Nebraska's Invertebrate Fossils

References:

Dunbar, C.O. and Condra, G.E., 1932, Brachiopoda of the Pennsylvanian
System in Nebraska; Nebraska Geological Survey, Bulletin 5, p.344,
pl.42, figs.12-14

Hoare, R. D., 1961, Desmoinesian Brachiopoda and Mollusca from
Southwest Missouri; University of Missouri Press, p.81, pl.11,
figs.1-3

Hoare, R.D., 1968, Pennsylvanian brachiopods of Ohio; Ohio Geological
Survey Bulletin 63, p.60, pl,19, figs.21-25

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Phylum Brachiopoda (brachiopods)
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