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Species / Calyptraphorus Trinodiferus

Calyptraphorus Trinodiferus


Original Description of Calyptraphorus trinodiferus by Conrad, 1857, cited by Clark & Martin, 1901:

  • "Subfusiform, with three distinct nodes on the upper part of the body volution; spire subtriangular, having curved longitudinal ribs visible beneath the tunic; rostrum of the spire elongated and curved; labrum with a prominent angle above."

Stratum typicum: Eocene

Locus typicus: Alabama, USA

History and Synonymy


Calyptraphorus trinodiferus Conrad, 1860, pl. XLVII, fig. 29


Calyptraphorus trinodiferus in Gabb, 1868, pl. 13, fig. 10


Rostellaria (Calyptraphorus) trinodifera in De Gregorio, 1890, pl. 10, fig. 3 - 6


Rostellaria (Calyptrophorus) trinodifera in Cossmann, 1904, pl. III, fig. 3


Science Base Catalog, USGS, 2013 reports

  • "Invertebrate fossil, GSA Cenozoic Toulmin number 3830, from the GSA Cenozoic Toulmin invertebrate paleontology collection. This specimen box contains 1 specimen(s) of the Snail Calyptraphorus trinodiferus from the Eocene Hatchetigbee Formation in Clarke County, AL, USA"

Specimens from institutional collections

Calyptraphorus trinodiferus; Eocene; Claiborne, Alabama, USA; 35mm; Coll. BM(NH) no. G.834; Copyright BM(NH)

Specimens from private collections

Calyptraphorus trinodiferus; Wilcox Stage, Bassi Formation, early Eocene; West of Butler, Highway 10, Butler, Choctaw County, Alabama, USA; Coll. Aart Dekkers no. STR9107


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