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A new early Campanian rudist fauna from San Luis Potosi in Mexico and its taxonomic and stratigraphic significance

Jose Maria Pons, Enric Vicens, Yolanda Pichardo, Javier Aguilar, Angelica Oviedo, Gloria Alencaster and Pedro Garcia-Barrera
A new early Campanian rudist fauna from San Luis Potosi in Mexico and its taxonomic and stratigraphic significance
Journal of Paleontology (September 2010) 84 (5): 974-995

Abstract

A rudist fauna composed of the radiolitids Potosites tristantorresi new genus, new species and Radiolites acutocostata (Adkins), the hippuritids Barrettia cf. ruseae Chubb, Torreites sanchezi (Douville), and Vaccinites vermunti Mac Gillavry, plagioptychids, and antillocaprinids is described from a rudist limestone succession in the central Mexican State of San Luis Potosi. The previously known species, one radiolitid from Texas and three hippuritids from the Caribbean Biogeographic Province, indicate the early Campanian. The new genus is a large radiolitid with a coiled and canaliculated left valve. New observations on R. acutocostata and V. vermunti shell morphology and variability are provided. Observations made on well preserved specimens of the latter species clarify the outer shell layer structure of the hippuritids right valve and has taxonomic implications. This is the first report of genus Torreites in Mexico and one of the northernmost records of genus Barrettia, already reported in southern Mexico from Chiapas State. This rudist limestone succession (informally "Temazcal limestones" herein) is an easy-to-recognize cartographical unit; up to now it and Santonian and Turonian units have been mapped as the El Abra Formation in most available geological maps. Recognition of the successive carbonate platform intervals, between El Abra and Cardenas Formations, improves the geological mapping and the understanding of the Mexican Gulf western margin evolution during the Late Cretaceous.


ISSN: 0022-3360
EISSN: 1937-2337
Coden: JPALAZ
Serial Title: Journal of Paleontology
Serial Volume: 84
Serial Issue: 5
Title: A new early Campanian rudist fauna from San Luis Potosi in Mexico and its taxonomic and stratigraphic significance
Affiliation: Universitat Autonoma de Barcelona, Departament de Geologia, Bellaterra, Spain
Pages: 974-995
Published: 20100901
Text Language: English
Publisher: Paleontological Society, Lawrence, KS, United States
References: 55
Accession Number: 2010-087361
Categories: Invertebrate paleontology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, sketch map
N22°00'00" - N23°00'00", W100°45'00" - W100°15'00"
Secondary Affiliation: Universidad Nacional Autonoma de Mexico, MEX, Mexico
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, Copyright, The Paleontological Society. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201046
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