SMITHIAN (EARLY TRIASSIC) AMMONOIDS FROM CRITTENDEN SPRINGS, ELKO COUNTY, NEVADA: TAXONOMY, BIOSTRATIGRAPHY AND BIOGEOGRAPHY: Bulletin 78New Mexico Museum of Natural History and Science, 2018 - 175 Seiten |
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ammonoid Anasibirites apertural views beds biostratigraphy Body chamber Body chamber length Box plot Brayard and Bucher Brühwiler Chao coiling Condensoceras youngi convex flanks Crittenden Springs diagrams of H dieneri Dieneroceras Dmm W H early Smithian Early Triassic Euflemingites exhibit figs Figure Galfettites genus Goniodiscus growth lines H U W/D H/D U/D Hedenstroemia Hemiprionites holotype Hyatt and Smith illustrated specimens indet involute Inyoites Jattiot Jenks Juvenites Kummel and Steele late Smithian lucasi Mathews measured specimens middle Smithian millardense multiformis Nevada NMMNH Occurrence Paranannites paratype phragmocone present specimens preserved Primorye Pseudosageceras multilobatum Noetling radial radians ribs rounded shoulders rubyae saddles scale bars Scatter diagrams Shigeta silberlingi sinuous slightly South China southeastern Idaho Spath subtabulate Suture line ceratitic taxa taxon Tozer Type species type specimens umbilical shoulder umbilicus Utah ventral and F ventral shoulder ventral views W/D and U/D Waagen Wasatchites whorl height whorl section whorl width Zakharov