Plesiaster americanus (Stephenson, 1941)

Remarks

• Collector:       Dan Woehr
• Formation:     Navarro Group, Corsicana Formation
• Location:        Bexar County, Texas

General Info

Synonyms (older names and misidentifications in the literature)

• 1941 Micraster (Plesiaster) americanus Stephenson

• 1954 Micraster americanus (Stephenson); Cooke

Stratigraphic Occurrence

• Navarro Group, Corsicana Formation of south-central Texas

• Prairie Bluff Formation of Alabama and Mississippi

• Saratoga Chalk of southwestern Arkansas

Age

• Plesiaster americanus (Stephenson) is a Late Maastrichtian echinoid (~66 mya).

Geographic Occurrence (by no means an all-inclusive list)

• Bexar County, Texas

• Clark County, Arkansas

• Hempstead County, Arkansas

• Medina County, Texas

• Pontotoc County, Mississippi

• Union County, Mississippi

• Wilcox County, Alabama

Remarks

         For identification and descriptions, see:

• Cooke, C. W.  1954.  American Upper Cretaceous Echinoidea.  United States Geological Survey Professional Paper 254-A, 38; plate 15, fig's 10-13.

• Stephenson, L. W.  1941.  The Larger Invertebrate Fossils of the Navarro Group of Texas (Exclusive of Corals and Crustaceans, and Exclusive of the Fauna of the Escondido Formation).  University of Texas Bulletin 4101, 69-70; plate 7, fig's 1-4.