Representatives of the ammonoid genera Perrinites and Peritrochia are described from south of Chiocomuselo, Chiapas. It is concluded that the containing beds belong in the Leonard series.
Proceedings of the Iowa Academy of Science
©1940 Iowa Academy of Science, Inc.
Miller, A. K. and Furnish, W. M.
"Permian Ammonoids from Southernmost Mexico,"
Proceedings of the Iowa Academy of Science, 47(1), 268-268.
Available at: https://scholarworks.uni.edu/pias/vol47/iss1/59