Texigryphaea pitcheri (Morton, 1834)

Remarks

• Collector:    Keith Minor
• Formation:  Purgatoire Group, Tucumcari Formation
• Location:     Tucumcari Mountain, Quay County, New Mexico

General Info

Synonyms (older names and misidentifications in the literature)

• "Toenails"

• 1823 Gryphaea corrugata Say

• 1834 Gryphaea pitcheri Morton

• 1855 Does not = Gryphaea pitcheri Morton; Marcou

• 1855 Does not = Gryphaea pitcheri Morton; Blake

• 1856 Gryphaea pitcheri Morton; Hall

• 1857 Gryphaea pitcheri Morton; Conrad

• 1861 Gryphaea pitcheri Morton; Gabb

• 1869 Gryphaea pitcheri Morton; Gabb

• 1880 Gryphaea pitcheri Morton; Dana

• 1891 Gryphaea pitcheri var. hilli Cragin

• 1891 Gryphaea pitcheri var. "hilli" phase

• 1894 Does not = Gryphaea pitcheri Morton; Brown (= T. navia)

• 1895 Gryphaea pitcheri Morton; Dana

• 1895 Gryphaea hilli Cragin

• 1898 Gryphaea corrugata Say; Hill & Vaughan

• 1947 Gryphaea corrugata Say; Shimer & Shrock

• 1947 Gryphaea corrugata hilli Cragin; Shimer & Shrock

• 1977 Texigryphaea corrugata corrugata (Say); Kauffman

• 1977 T. corrugata belviderensis (Hill and Vaughan); Kauffman

• 1989 Texigryphaea pitcheri (Morton); Kues

• 2001 Texigryphaea pitcheri (Morton); Kues & Lucas

Stratigraphic Occurrence

• Skull Creek Group, Kiowa Formation, Champion Draw Member of south-central Kansas

• Purgatoire Group, Tucumcari Formation of northeast New Mexico

• Washita Group, Caddo Formation of southeastern Oklahoma

• Washita Group, Fort Worth Formation of northern Texas

• Washita Group, Duck Creek Formation of northern Texas

• Fredericksburg Group, Upper Kiamichi Formation of northern Texas

Age

• Texigryphaea pitcheri (Morton) ranges from the Adkinsites bravoensis (Bose) zone to about the Mortoniceras equidistans (Cragin) zone, early late Albian to middle late Albian (~102–100 mya).

Geographic Occurrence (not an all-inclusive list)

• Choctaw County, OK

• Comanche County, KS

• Custer County, OK

• Grayson County, TX

• Kiowa County, KS

• Quay County, NM

• Tarrant County, TX

Remarks

         For identification, descriptions, and ranges, see:

• Cragin, F. W.  1895.  A Study of the Belvidere Beds.  American Geologist 16, 357–385.
• Hill, R. T.; Vaughan, T. W. 1898. The Lower Cretaceous Gryphaeas of the Texas Region. United States Geological Survey Bulletin 151. Washington D. C.: U. S. G. S.
• Kues, B. S. 1989. Taxonomy and Variability of Three Texigryphaea (Bivalvia) Species from their Lower Cretaceous (Albian) Type Localities in New Mexico and Oklahoma. Journal of Paleontology 63 (4), 454–483.
• Kues, B. S.; Lucas, S. G.  2001.  Nearshore fauna of the Tucumcari Formation (Lower Cretaceous, Albian), Quay County, New Mexico.  New Mexico Geological Society Guidebook, 52nd Field Conference, Geology of the Llano Estacado, pp. 229-249.
• Shimer, H. W.; Shrock, R. R. 1947. Index Fossils of North America. New York: John Wiley & Sons.
• Twenhofel, W. H.  1924.  The Geology and Invertebrate Paleontology of the Comanchean and "Dakota" Formations of Kansas.  State Geological Survey of Kansas Bulletin 9.