Pachydesmoceras Spath, 1922, a Cretaceous ammonite in Colorado
By: by William A. Cobban and W. James Kennedy.
Contributors: Kennedy, W. J.
Series: U.S. Geological Survey bulletin -- 1985-A; Shorter contributions to paleontology and stratigraphy
Publisher: U.S. Govt. Print. Off.
Published: 1991
Place of publication: [Washington
Language: eng
Subjects: Ammonoidea -- Colorado.; Paleontology -- Cretaceous.; Paleontology -- Colorado -- Cretaceous.
Notes: "First record of the Cretaceous (Turonian) puzosiine ammonite genus Pachydesmoceras Spath, 1922, in the western interior of the United States."

Includes bibliographical references (p. 3).