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Early Maastrichtian mollusca from the Mexcala Formation of the state of Guerrero, southern Mexico

Published online by Cambridge University Press:  14 July 2015

Maria Del Carmen Perrilliat
Affiliation:
Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, Mexico D. F. 04510, Mexico,
Francisco J. Vega
Affiliation:
Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, Mexico D. F. 04510, Mexico,
Rodolfo Corona
Affiliation:
Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, Mexico D. F. 04510, Mexico

Abstract

Forty species of gastropods (six of them new: Calliomphalus (Planolateralus) mexcalensis, Nododelphinula diminuta, Potamides temalacensis, Ptychopotamides ancestralus, Amaurellina guerrera, and Drilluta gloriae), and 13 species of bivalves are described from the lower Maastrichtian marls of the basal Mexcala Formation from Guerrero State, southern Mexico. Age interpretation was based on planktic foraminiferans. Associated fauna includes planktic and benthic foraminiferans, ostracods, solitary corals, crustaceans, echinoids, and vertebrates. The distribution of bivalve and gastropod species suggests that this area has affinities with the Gulf Coast Plain Province of the United States, although some species also are reported from the Middle East, Europe, and South America.

Type
Research Article
Copyright
Copyright © The Paleontological Society 2000

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