Inoceramus (Cremnoceramus) deformis deformis (Meek, 1871)

Remarks

• Collector:    Prof. Norm King, Univ. So. Indiana
• Formation:  Niobrara Group, Base of Smoky Hill Shale
• Location:    Otero County, Colorado

Remarks

• Collector:    Prof. Norm King, Univ. So. Indiana
• Formation:  Niobrara Group, Fort Hays Limestone
• Location:     Ellis County, Kansas

General Info

Synonyms (older names and misidentifications in the literature)

• 1845? Inoceramus ? Hall
• 1871 Inoceramus deformis Meek
• 1877 Inoceramus deformis Meek; Meek
• 1877 Inoceramus deformis Meek; White
• 1894 Inoceramus deformis Meek; Stanton (in part)
• 1896 Inoceramus deformis Meek; Gilbert
• 1898 Inoceramus deformis Meek; Logan
• 1898 Inoceramus deformis Meek; Hill & Vaughan
• 1900 Inoceramus deformis Meek; Herrick & Johnson
• 1910 Inoceramus deformis Meek; Grabau & Shimer
• 1955 Inoceramus deformis Meek; Cobban
• 1964 Inoceramus deformis Meek; Scott & Cobban
• 1967 Does not = Inoceramus deformis Meek; Tröger (= I. crassus crassus)
• 1968 Inoceramus deformis Meek; Miller
• 1970 Inoceramus deformis Meek; Miller
• 1972 Inoceramus deformis Meek; Frey
• 1974 Inoceramus deformis Meek; Tröger
• 1977 Inoceramus (?) deformis Meek ("late form"); Kauffman
• 1977 Inoceramus (?) deformis deformis Meek; Kauffman
• 1978 Inoceramus (?) deformis Meek; nssp. ("late form"); Kauffman
• 1978 Inoceramus (?) deformis deformis Meek; Kauffman
• 1979 Inoceramus deformis Meek; Ivannikov
• 1985 Inoceramus deformis Meek; Szász
• 1985 Inoceramus schloenbrachi Böhm; Szász
• 1985 Inoceramus paradeformis Szász (in part)
• 1985 Inoceramus dobrogensis Szász (in part)
• 1991 Does not = Cremnoceramus deformis (Meek); Collom
• 1992 Cremnoceramus deformis (Meek); Walaszczyk
• 1998 Cremnoceramus deformis (Meek); Collom (in part)
• 2000 Cremnoceramus deformis deformis (Meek); Walaszczyk & Cobban
• 2002 Cremnoceramus deformis Meek; Akers & Akers

Stratigraphic Occurrence

• Niobrara Group, Fort Hays Limestone Member of southeastern Wyoming
• Niobrara Group, Base of the Smoky Hill Shale Member of  eastern Colorado
• Mancos Shale of southwestern Colorado
• Austin Group, Atco Limestone of north Texas

Age

• Inoceramus (Cremnoceramus) deformis deformis (Meek) occurs in the late Early Coniacian stage (~87 mya).

Geographic Occurrence (not an all-inclusive list)

• Dallas County, TX
• Laramie County, WY
• Moffat County, CO
• Otero County, CO

Remarks

For identification and descriptions, see:

• Kauffman, E. G.  1977.  “Illustrated Guide to Biostratigraphically Important Macrofossils, Western Interior Basin, U. S. A.”.  In:  Kauffman, E. G., ed.  Field Guide:  North American Paleontological Convention II.  Cretaceous Facies, Faunas, and Paleoenvironments Across the Western Interior Basin.  The Mountain Geologist 14 (3-4), plate 12, fig's 2 and 3.

• Kauffman, E. G.; Sageman, B. B.; Kirkland, J. I.; Elder, W. P.; Harries, P. J.; Villamil, T. 1993.  "Molluscan Biostratigraphy of the Cretaceous Western Interior Basin, North America".  In:  Caldwell, W. G. E.; Kauffman, E. G., eds. Geological Association of Canada Special Paper 39, 416.

• Walaszczyk, I.; Cobban, W. A.  2000.  Inoceramid Faunas and Biostratigraphy of the Upper Turonian-Lower Coniacian of the Western Interior of the United States.  Palaeontological Association, Special Papers in Palaeontology 64, plate 26, fig's 1−5; plate 27, fig's 4 and 5.