Galapagos Species Database

Taxon category: Accepted

Syn.: Nacella peltoides, N. subspiralis, Siphonaria peltoides (Horton et. al, 2021) fide Dall, 1896, Williamia galapagana Dall, 1917 (nomen nudum as of Dall, 1909); AMNH: 117922, CDRS: 741, 1267, USNM: 60416 (“Holotype” and “Paratype” of W. galapagana Dall, nomen novum for Nacella subspiralis Wimmer, 1879, non Carpenter, 1866), 102365 (“Paratypes” of W. galapagana Dall). Finet (2001): The Holotype of Williamia peltoides (Carpenter) is not from the Galapagos, but from Cape San Lucas, Baja California;

Origin: Native

IUCN Red List Category: Not evaluated

Map of specimen collection localities or observation records for this species in our collections database.

Distribution: South of Gulf of California, Panama and Ecuador (Galapagos Islands).

• Dall, W.H. (1896) Diagnosis of new species of mollusks from the west coast of America. Proceedings of the United States National Museum 18 (1034): 7-20.
• Dall, W.H. (1909) Report on a collection of shells from Peru, with a summary of the littoral marine Mollusca of the Peruvian zoological Province. Proc. United States Natl. Mus. 37 (1704): 147-294, pls. 20-28.
• Dall, W.H. (1917) Preliminary descriptions of new species of Pulmonata of the Galapagos Islands. Proceedings of the California Academy of Sciences, 4th series, 2 (pt. 1, no. 11): 375-382.
• Finet, Y. (1991) The Marine Mollusks of the Galapagos Islands. In: Galápagos Marine Invertebrate. Taxonomy, Biogeography, and Evolution in Darwin's Islands. Plenum Press. New York and London, p. 253-280.
• Finet, Y. (2001) The marine mollusks of the Galapagos Islands: a documented faunal list. Editions du Muséum d' Histoire naturelle, Genève, 237 pp.
• Hickman, C.P. Jr. Finet, Y. (1999) A Field Guide to the Marine Molluscs of Galápagos. Sugar Spring Press, Lexington, Virginia, 150 pp.
• Horton, T. Horton, T., Kroh, A., Ahyong, S., Bailly, N., Boyko, C. B., Brandão, S. N., Gofas, S., Hooper, J. N. A., Hernandez, F., Holovachov, O., Mees, J., Molodtsova, T. N., Paulay, G., Decock, W., Dekeyzer, S., Poffyn, G., Vandepitte, L., Vanhoorne, B., Adlard, R., ... Zhao, Z. (2021) World Register of Marine Species. Available from https://www.marinespecies.org at VLIZ.
• Keen, A.M. (1958) Sea Shells of Tropical West America. Stanford University Press, Palo Alto, 1st edition, 624 pp.
• Palmer, K. V. W. (1958) Type specimens of marine Mollusca described by PP Carpenter from the west coast (San Diego to British Columbia) Palmer, K. V. W. (1958). Type specimens of marine Mollusca described by PP Carpenter from the west coast (San Diego to British Columbia) (Vol. 76). Geological Society of America