A rare occcurrence of what is believed to be a quasillitacean ostracode has been found in Ohio. The occurrence of the family Quasillitidae in the Pennsylvanian was questioned by Sohn and Stover (1961, p. Q374). This included the genera QuasillitesCoryell and Malkin, 1936, and GraphiadactyllisRoth, 1929. The latter genus is common in Chesterian strata in the United States. Recently a single occurrence of a new genus and species, Simulatus adornatus, has been found in Pennsylvanian (Desmoinesian) strata.

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The locality from which the sample was taken was in the black shale immediately overlying the Vanport...

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