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Holectypus planatus

Geological Range

Albian

Paleogeographic Distribution

Texas

Remarks

Original species description from Roemer (1849, p. 393):

"Holectypus planatus n. sp. Testa 1" 5''' lata, 7''' alta, orbiculari, subpentagona, parum elevata, planata, ano ovali maximo ab ore usque ad marginem porrigente."

Note: Description transcribed from original copy of Roemer (1849) in the Rare Books collection of the Paleontological Research Institution.

Stratigraphic Occurrences

Albian
Georgetown Formation (TX)
Goodland Limestone (TX)
Walnut Formation (TX)
Unknown Stage
Buda Limestone (TX)
Glen Rose Formation (TX)
Goodland Formation (TX)
Walnut Clay (TX)
<i>Holectypus planatus</i>, possibly from the Albian Washita Group of Texas (KUMIP 370233).
Holectypus planatus, possibly from the Albian Washita Group of Texas (KUMIP 370233).
<i>Holectypus planatus</i> from the Albian Fredericksburg Group (Walnut Clay Formation) of Travis County, Texas (KUMIP 370230).
Holectypus planatus from the Albian Fredericksburg Group (Walnut Clay Formation) of Travis County, Texas (KUMIP 370230).
Stratigraphic position unknown
Stratigraphic position unknown