Paracymatoceras texanum (Shumard, 1860)

Remarks

• Collector:    Keith Minor
• Formation:  Washita Group, Weno Limestone
• Location:     Tarrant County, TX

Example from the Georgetown LS, Williamson County, Texas (Bill Jolley)

General Info

Synonyms (older names and misidentifications in the literature)

• 1852 ?Nautilus elegans Roemer

• 1860 Nautilus texanus Shumard

• 1894 Nautilus washitanus Cragin

• 1920 Nautilus washitanus Cragin; Adkins

• 1928 Cymatoceras texanum (Shumard); Adkins

• 1945 Paracymatoceras texanum (Shumard); Miller & Harris

• 1994 Paracymatoceras texanum (Shumard); Emerson et al.

Stratigraphic Occurrence

• Uppermost Washita Grp, Buda Fm of north–central TX

• Uppermost Washita Grp, Grayson Fm of north TX

• Upper Washita Grp, Weno Fm of north TX

• Lower Washita Grp, Fort Worth Fm of North TS

• Basal Washita Grp, Duck Creek Fm of north TX

Age

• Paracymatoceras texanum (Shumard, 1860) ranges from about early Late Albian to Early Cenomanian time (~101 to 97 mya).

Geographic Occurrence (not an all-inclusive list)

• Grayson County, TX

• Johnson County, TX

• Tarrant County, TX

• Travis County, TX

Remarks

         For identification and descriptions, see:

• Miller, A. K.; Harris, R. A. 1945. North American Cymatoceratidae (Mesozoic Nautiloidea).  Journal of Paleontology 19 (1), 1–13.