MIDDLE PENNSYLVANIAN GASTROPODS FROM THE FLECHADO FORMATION, NORTH-CENTRAL NEW MEXICO

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Abstract
The lower Desmoinesian part of the Flechado Formation near Taos, New Mexico, contains a diverse marine fauna within predominantly dark gray shale and siltstone facies representing deposition in shallow marine environments adjacent to prograding lobes of a fan delta system. Gastropods are particularly abundant and diverse in a 60-m-thick section south of the town of Talpa; 157 species are described in this paper, including 19 new species and two new genera. New species are Euphemites hermosus, Luciellina ocultabanda, Spiroscala georgiannae, Glabrocingulum (Glabrocingulum) globosum, G. (Ananias) talpaensis, Worthenia legrandi, Cyclites diminutus, Platyzona hespera, Anomphalus? blancus, Stegocoelia (Donaldospira) taosensis, S. (Hypergonia) hoffmani, S. (H.) agraciada, Bicuerda procolumnare, new genus and species; Hermosanema varium, new genus and species, Pseudozygopleura (Stephanozyga) granda, P. (S.) lisaspira, Hemizyga (Hemizyga) larga, Strobeus immanis, and Meekospira delgada. Species of Pleurot...