Orbiculoidea missouriensis (Shumard, 1858)

Brachial Valve

The small circles represent predatory or parasitic borings.

Pedicle Valve

Orbiculoidea missouriensis (Shumard, 1858)

General abundance:  Common

Orbiculoidea missouriensis (Shumard) is a phosphatic-shelled,
inarticulate brachiopod. Inarticulate brachiopods open their valves
with muscular and ligamentous connections.

Viewer Comments:

Nice Orbiculoidea. I have collected a bunch of O. keokuk
from my crinoid locality. Complete / completely exposed
specimens are rare. My smallest is 1 cm, the largest is
about 6 cm in diameter. Most fall somewhere in between.
Alan Goldstein

References:
Dunbar, C.O. and Condra, G.E., 1932, Brachiopoda of the Pennsylvanian
System in Nebraska; Nebraska Geological Survey, Bulletin 5, p.42,
pl.1, figs.12-17.

Hoare, R. D., 1961, Desmoinesian Brachiopoda and Mollusca from
Southwest Missouri; University of Missouri Press, p.22, pl. 1,
figs.3-5

Hoare, R.D., 1968, Pennsylvanian brachiopods of Ohio; Ohio Geological
Survey Bulletin 63, p.22, pl.1, figs.7-11

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Phylum Brachiopoda (brachiopods)
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