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

書誌詳細
主要な著者: Cobban, W, Kennedy, W
フォーマット: Journal article
言語:English
出版事項: 1990