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Opertochasma subconicum

Geological Range

Cenomanian

Paleogeographic Distribution

Texas

Stratigraphic Occurrences

Cenomanian
Woodbine Formation (TX)
Woodbine Formation (Lewisville Member) (TX)
<i> Opertochasma subconicum </i> from the Cenomanian Woodbine Fm. of Texas (Stephenson 1953).
Opertochasma subconicum from the Cenomanian Woodbine Fm. of Texas (Stephenson 1953).
Stratigraphic position unknown
Stratigraphic position unknown