Observations on the Cenomanian (Upper Cretaceous) ammonite Calycoceras (Calycoceras) obrieni Young, 1957 from Arizona and New Mexico

Observations on the Cenomanian (Upper Cretaceous) ammonite Calycoceras (Calycoceras) obrieni Young, 1957 from Arizona and New Mexico

Calycoceras (Calycoceras) obrieni Young, 1957 is revised on the basis of new collections from the upper Cenomanian Metoicoceras mosbyense zone of Arizona and New Mexico, and differences between it and C. (C.) naviculare (Mantell, 1822) are described. -Authors

Номзүйн дэлгэрэнгүй
Үндсэн зохиолчид:	Cobban, W, Kennedy, W
Формат:	Journal article
Хэл сонгох:	English
Хэвлэсэн:	1990

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Upper cenomanian ammonites from the environs of Saumur, and the provenance of the types of Ammonites vibrayeanus and Ammonites geslinianus
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New records of the ammonite subfamily Texanitinae in Campanian (Upper Cretaceous) rocks in the Western Interior of the United States
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Lower Turonian (Upper Cretaceous) Watinoceras devonense Zone ammonite fauna in Colorado, USA
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Upper Albian and Lower Cenomanian ammonites from the Main Street Limestone, Grayson Marl and Del Rio Clay in northeast Texas
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Platyscaphites, a new ammonite from the Lower Campanian (Upper Cretaceous) of the United States Western Interior
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Upper Cretaceous heteromorph ammonites from the Baculites compressus zone of the Pierre Shale in north-central Colorado
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Campanian (Late Cretaceous) ammonites from the Bergstrom Formation in Central Texas
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Heteromorph ammonites from the Upper Campanian (Upper Cretaceous) Baculites cuneatus and Baculites reesidei zones of the Pierre Shale in Colorado, USA
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The ammonite Metengonoceras Hyatt, 1903, from the Mowry Shale (Cretaceous) of Montana and Wyoming
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Upper Cretaceous ammonites from the Coon Creek Tongue of the Ripley Formation at its type locality in McNairy County, Tennessee
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