Trapezium compacta (White, 1880)

Remarks

• Collector:    Keith Minor
• Formation:  Trinity Group, Upper Glen Rose Limestone
• Location:    Travis County, Texas

General Info

Synonyms (older names and misidentifications in the literature)

• 1880 Pachymya ? compacta White
• 1893 Pachymya ? compacta White; White
• 1911 Arctica compacta (White); Whitney
• 1928 Trapezium compacta (White); Adkins
• 1928 Pachymya ? compacta White; Henderson
• 1937 Cypricardia compacta (White); Whitney
• 1943 Cypricardia compacta (White); Plummer
• 1969 Trapezium compacta (White); Moore
• 2002 Trapezium compacta (White); Akers & Akers

Stratigraphic Occurrence

• Trinity Group, Upper Glen Rose Limestone (Loriolia rosana Cooke Zone)
• There is one report from the Washita Group, Buda Limestone, but we haven't verified the report yet.  It may be a different species of Trapezium.

Age

• Trapezium compacta (White) occurs in the Early Albian Stage (~108 mya).

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

• Bandera County, TX
• Bell County, TX
• Travis County, TX

Remarks

         For identification and descriptions, see:

• Akers, R. E.; Akers, T. J.  2002.  Texas Cretaceous Bivalves 2.  Texas Paleontology Series Publication 7.  Houston:  Paleontology Section, Houston Gem and Mineral Society, 304, fig. 277.