Xanthosia aspera Rathbun, 1935

Remarks

• Collector:    Lee Duchouquette

• Location:     Washita Group, Weno Formation

• Formation:  Tarrant County, Texas

• side-to-side:  ~ 19 mm

• head-to-tail:  ~  9 mm

General Info

Synonyms (older names and misidentifications in the literature)

• 1935 Xanthosia aspera Rathbun

• 1991 Xanthosia aspera Bishop

Stratigraphic Occurrence

• Upper Washita Group, Pawpaw Formation of North Texas

• Upper Washita Group, Weno Formation of North Texas

• Middle Washita Group, Denton Formation of North Texas

Age

Xanthosia aspera Rathbun occurs from the Mortoniceras (Angolaites) wintoni (Adkins) zone to the Mariella (Wintonia) brazoensis (Roemer) zone, latest Albian–earliest Cenomanian (~98–97 mya).

Geographic Occurrence (not an all-inclusive list)

• Grayson County, Texas

• Tarrant County, Texas

Remarks

         For identification and descriptions, see:

• Rathbun, M. J.  1935.  Fossil Crustacea of the Atlantic and Gulf Coastal Plain.  Geological Society of America Special Paper 2.