Stereocidaris hudspethensis Cooke, 1955

Remarks

• Collector:       Dr. Stephen Crane

• Formation:     Washita Group, Boracho Formation, Levinson Member

• Location:       Texas

• Dimensions:   diam = 4 inches (several specimens shown)

General Info

Synonyms (older names and misidentifications in the literature)

• 1860 Does not = Cidaris hemigranosus Shumard

• 1915 Leiocidaris hemigranosus (Shumard); Clark & Twitchell

• 1955 Stereocidaris hudspethensis Cooke

• 1987 Stereocidaris hudspethensis Akers & Akers

Stratigraphic Occurrence

• Washita Group, Boracho Formation, Levinson Mbr

• Washita Group, Fort Worth Formation

Age

• Stereocidaris hudspethensis Cooke occurs at about the Fort Worth Limestone-Denton Marl level, which places it in or around the Mortoniceras (Angolaites) lasswitzi (Young) Zone or lower part of the Mortoniceras (Angolaites) wintoni (Adkins) Zone, very Late Albian Stage (~98 mya).

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

• Texas

Remarks

         For identification and descriptions, see:

• Cooke, C. W.  1955.  Some Cretaceous Echinoids from the Americas.  United States Geological Survey Professional Paper 264-E, 89; plate 18, fig's 1–4 (holotype + spine).