Two species of Placenticeras (Ammonitina) from the Upper Cretaceous (Campanian) of the Western Interior of the United States. American Museum novitates ; no. 3173

Kennedy, W. J. (William James)Cobban, William A., 1916-2015.Landman, Neil H.2005-10-062005-10-061996http://hdl.handle.net/2246/363013 p. : ill. ; 26 cm.Includes bibliographical references (p. 13)8692945 bytesapplication/pdfen-USQL1 .A436 no.3173 1996Placenticeras.Ammonoidea -- West (U.S.)Paleontology -- Cretaceous -- West (U.S.)Paleontology -- West (U.S.)Two species of Placenticeras (Ammonitina) from the Upper Cretaceous (Campanian) of the Western Interior of the United States. American Museum novitates ; no. 3173text