Cymatoceras hilli (Shattuck, 1903)

Remarks

• Collector:    Keith Minor
• Formation:  Washita Group, Pawpaw Clay
• Location:     Denton County, TX

General Info

Synonyms (older names and misidentifications in the literature)

• 1852 ?Nautilus simplex Roemer

• 1889 ?Nautilus n. sp. Hill

• 1903 Nautilus hilli Shattuck

• 1920 Nautilus texanus Adkins & Winton

• 1926 Nautilus texanus Adkins & Winton; Scott

• 1928 ?Nautilus n. sp. Hill; Adkins

• 1928 Cymatoceras hilli (Shattuck); Adkins

• 1928 ?Cymatoceras simplex (Roemer); Adkins

• 1945 Cymatoceras hilli (Shattuck); Miller & Harris

• 1994 Cymatoceras hilli (Shattuck); 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, Mainstreet Fm of north TX

• Upper Washita Grp, Pawpaw Fm of north TX

• Upper Washita Grp, Weno Fm of north TX

• Lower Washita Grp, Fort Worth Fm of North TX

Age

• Cymatoceras hilli (Shattuck) is a long-ranging nautiloid that occurs from about early Upper Albian (~102 mya) to early Cenomanian time (~97 mya).

Geographic Occurrence (not an all-inclusive list)

• Denton 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.