The Upper Cretaceous (Cenomanian) ammonites Metengonoceras dumbli (Cragin) and M. acutum Hyatt

W. A. Cobban

1987

Article

United States Geological Survey Bulletin 1690:C1

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Taxonomy:

• Metengonoceras douvillei belongs to Metengonoceras dumbli - Cobban (1987)
• Metengonoceras arnaudi belongs to Metengonoceras dumbli - Cobban (1987)
• Metengonoceras tolveiense belongs to Metengonoceras dumbli - Cobban (1987)
• Metengonoceras acutum belongs to Metengonoceras - Cobban (1987)