Hemiaster cranium Cooke, 1946

Remarks

• Collector:      Dr. Stephen Crane

• Formation:    Upper Washita Group, Weno Formation

• Location:       Johnson County, TX.

• Dimensions:  lt = 35 mm, wdt = 31 mm (widest part), ht = 23 mm (tallest part)

General Info

Synonyms (older names and misidentifications in the literature)

• 1946 Hemiaster cranium Cooke

• 1987 Hemiaster cranium Cooke; Akers & Akers

Stratigraphic Occurrence

• Upper Washita Group, Weno Formation

Age

• Hemiaster calvini Cooke occurs in the Mortoniceras (Angolaites) drakei (Young) zone, Upper Albian Stage  (~98 mya).

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

• Johnson County, TX

• Tarrant County, TX

Remarks

         For identification and descriptions, see:

• Cooke, C. W.  1946.  Comanche Echinoids.  Journal of Paleontology 20 (3), 226–227 and plate 32, figs 1–4.