MolluscaBase taxon details
original description
(of Cancellaria (Trigonostoma) sphenoidostoma J. A. Gardner, 1938 †) Gardner J.A. (1938). The molluscan fauna of the Alum Bluff Group of Florida. Part VI. Pteropoda, Opisthobranchia and Ctenobranchia (in part). <em>United States Geological Survey Professional Paper.</em> 142-F: 251-435, pls 37-48., available online at https://pubs.usgs.gov/pp/0142f/report.pdf [details]
basis of record
Landau, B., Petit, R. & da Silva, C.M. (2012). New Cancellariidae (Mollusca, Gastropoda) from the Miocene Gatun Formation of Panama, with eleven new species. <em>Journal of Paleontology.</em> 86(6): 907-930. [details] Available for editors [request]