Mytiloides bellefourchensis Walaszczyk & Cobban, 2000

Remarks

• Collector:    Prof. Norm King, Univ. of Southern Indiana

• Formation:  Mancos Shale, just below the Fort Hays equivalent (the Mancos is a diachronous formation and = part of the Niobrara at some places.)

• Location:     Archuleta County, CO

General Info

Synonyms (older names in the literature)

• 1997 Mytiloides striatoconcentricus (Gümbel); Leckie et al. (in part)
• 2000 Mytiloides bellefourchensis Walaszczyk & Cobban

Stratigraphic Occurrence

• Carlile Shale, Turner Sandy Member of South Dakota

• Mancos Shale of Colorado and New Mexico

Age

• Mytiloides bellefourchensis Walaszczyk & Cobban occurs in the Inoceramus perplexus Whitfield zone, very Late Turonian Stage (~ 89 mya).

Geographic Occurrence (not an all-inclusive list)

• Archuleta County, CO

• Butte County, SD

• Cibola County, NM

Remarks

         For identification, descriptions, and range see:

• 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, 414.
• 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, 56−58, plate 6, fig's 4, and 9−10; and plate 9, fig's 1−3.