Middle Eocene Cypraeoideans from the San Juan Formation, Chiapas, southern Mexico

  • María del Carmen Perrilliat Instituto de Geología, UNAM, Ciudad Universitaria, 04510, México, D. F., México.
  • Javier Avendaño Instituto de Historia Natural del Estado de Chiapas, Calzada de los Hombres Ilustres S/N, Tuxtla Gutiérrez, Chiapas, 29000, México.
  • Francisco J. Vega Instituto de Geología, UNAM, Ciudad Universitaria, 04510, México, D. F., México.
Keywords: Cypraeoidean gastropods, middle Eocene, Chiapas.

Abstract

Four cypraeoid species one new, and six subspecies, two new from the middle Eocene San Juan Formation in central Chiapas, southern Mexico are described and illustrated. The new species Macrocypraea veintensis sp.nov., and two new subspecies Bernaya (Bernaya ) media chiapasensis subsp. nov., and Cypraeorbis alabamensis mexicana subsp. nov. are established from well preserved specimens. Based on lithology and fossil content, a middle Eocene age for the San Juan Formation is confirmed.

Published
2018-06-08
Issue
Vol 20 No 1 (2003)
Section
Regular Papers

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