Menuites oralensis Cobban & Kennedy, 1993

Remarks

• Collector:    Unknown

• Formation:  Montana Group, Pierre Shale, Red Bird Silty Member

• Location:     Fall River County, South Dakota

• Menuites oralensis Cobban & Kennedy is very similar to its predecessor, Menuites portlocki complexus (Hall & Meek).  However the shell of M. oralensis Cobban & Kennedy is more compressed, and the ribs are denser and finer.

General Info

Synonyms (older names and misidentifications in the literature)

• 1937 Parapachydiscus complexus (Hall & Meek); Dane, Pierce and Reeside
• 1952 Pachydiscus complexus (Hall & Meek); Cobban & Reeside
• 1959 Anapachydiscus (Hall & Meek); Scott & Cobban
• 1963 Anapachydiscus ? complexus (Hall & Meek); Scott
• 1963 Menuites ? n. sp. Scott
• 1966 Anapachydiscus complexus (Hall & Meek); Gill & Cobban
• 1966 Menuites n. sp. Gill & Cobban
• 1975 Menuites sp. Hirsch
• 1993 Menuites oralensis Cobban & Kennedy

Stratigraphic Occurrence

• Montana Group, Pierre Shale, Redbird Silty Member of South Dakota
• Montana Group, Pierre Shale, Gilbert's "Rusty Zone" of Colorado

Age

• According to Cobban & Kennedy (1993, see ref below), Menuites oralensis Cobban & Kennedy is found only in the Baculites scotti Cobban Zone.

Geographic Occurrence (not an all-inclusive list)

• Fall River County, South Dakota
• Pueblo County, Colorardo

Remarks

         For identification and descriptions, see:

• Cobban, W. A.; Kennedy, W. J.  1993.  The Upper Cretaceous Dimorphic Pachydiscid Ammonite Menuites in the Western Interior of the United States.  United States Geological Survey Professional Paper 1533, 9–12, plate 4, fig's 1–3; plate 5, fig's 2–4; plate 6, fig's 1–8; plate 7, fig's 1–4; plate 8, fig's 1, 2, and 5–7; plates 9–14; and text fig. 6.