337 Triassic Cyrtinoid Spiriferinacean Brachiopods from Western N. America

Late Triassic cyrtinoid spiriferinacean brachiopods from western North America and their biostratigraphic and biogeographic implications - BAP #337 Cyrtinoid spiriferinacean brachiopods in samples from over fifty Late Triassic marine fossil localities in western North America include examples of three species of Spondylospira Cooper, 1942, one of which (S. tricosta) is new; one new species of Zugmayerella Dagys, 1963; and four new monotypic genera, represented by Dagyspirifer fascicostala, Phenacozugmayerella inimunicinata, Pseudospondylospira perplexa, and Vitimetula parva, all new species. In North America, all of these genera are limited to the Kamian and/or Norian. One species, Spondylospira incosta, n. sp. appears to be a good indicator of the early Norian. The family Laballidae of earlier workers is divided into the family Laballidae and the new family Spondylospiridae, based on absence or presence, respectively, of functional pedicle foramena; the latter family is divided into