MEXFUSUS ROTUNDICOSTATUS, A NEW GENUS AND SPECIES OF NEOGASTROPOD FROM THE LATE CRETACEOUS OF SOUTHERN MEXICO

GEERAT J. VERMEIJ; GREGORY S. HERBERT; FRANCISCO J. VEGA; MARÍA del CARMEN PERRILLIAT

doi:10.1666/0022-3360(2004)078<1123:MRANGA>2.0.CO;2

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GEERAT J. VERMEIJ,¹ GREGORY S. HERBERT,¹ FRANCISCO J. VEGA,² MARÍA del CARMEN PERRILLIAT²

¹Department of Geology, University of California at Davis, One Shields Avenue 95616, < >, < > vermeij@geology.ucdavis.edu herbert@geology.ucdavis.edu
²Instituto de Geologia, Ciudad Universitaria, Coyoacan, México D. F. 04510, México, < >, < > vegver@servidor.unam.mx mariacp@servidor.unam.mx

Abstract

Mexfusus rotundicostatus new genus and species is a neogastropod of uncertain affinities from the Late Cretaceous (Early Maastrichtian) Mexcala Formation of southern Mexico. It is characterized by strong, rounded, axial ribs, fine spinelets at the intersection of axial ribs and sharp spiral cords, subsutural cord, strong simple spiral cords, and an apparently smooth, glazed columellar lip. A possible second species is Peristernia conica Riedel, 1932 from the Coniacian of Cameroon.

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GEERAT J. VERMEIJ, GREGORY S. HERBERT, FRANCISCO J. VEGA, and MARÍA del CARMEN PERRILLIAT "MEXFUSUS ROTUNDICOSTATUS, A NEW GENUS AND SPECIES OF NEOGASTROPOD FROM THE LATE CRETACEOUS OF SOUTHERN MEXICO," Journal of Paleontology 78(6), 1123-1127, (1 November 2004). https://doi.org/10.1666/0022-3360(2004)078<1123:MRANGA>2.0.CO;2

Accepted: 1 March 2004; Published: 1 November 2004

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