Galapagos Species Database

Taxon category: Accepted

Finet (2001): Although the locality of the type lot is Santa Elena, W. Columbia, Sowerby (1835), in his original description, mentioned also the Galapagos Islands as locality for the species. Müller (1836), Carpenter (1835), Stearns (1893), Metivier (1968), Finet (1991) and Skoglund (1992) also recorded the species from the Galapagos, sometimes considering pica as a variety of D. inaequalis (Sowerby) (Carpenter, 1857: 360; Stearns, 1893; Metivier, 1968). Actually, both species are separate, but specimens of Diodora inaequalis were sometimes misidentified as Diodora pica in museum collections, and records of pica from the Galapagos may have been based upon such misidentifications (see also Finet, 1994).

Origin: Native

Distribution: San Juan del Sur, Nicaragua, to Santa Elena Peninsula, Ecuador.

• Carpenter, P.P. (1857) Report on the Present State of our Knowledge with Regard to the Mollusca of the West Coast of North America. Report of the British Association for the Advancement of Science (1856): 159-368.
• Finet, Y. (1994) The Marine Mollusks of the Galápagos Islands: a documented faunal list Muséum d'Histoire naturelle, Genève, 180 pp.
• 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.
• Finet, Y. (1994) Marine Molluscs of the Galapagos. Gastropods - A monograph and revision of the families Haliotidae, Scissurellidae, Fissurellidae and Lottiidae. Monographs on Galapagos Mollusca no. 1. Ed. L'Informatore Piceno, Ancona, 110 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.
• Metivier, B. (1968) Mollusques marins récoltés par M.R. Hofstetter sur les côtes de l'Equateur et aux îles Galapagos: Chitonidae et Fissurellidae. Bulletin du Muséum national d'histoire naturelle, Paris (2e série) 40(3): 585-596.
• Sowerby, G.B., (I) (1835) Characters of and observations on new genera and species of Mollusca and Conchifera collected by Mr. Cuming. Proceedings of the Zoological Society of London 3: 4-7 (Apr. 3), 21-23 (Apr. 16), 41-47 (June 1), 49-51 (July 17), 84-85, 93-96 (Sept. 25), 109-110 (Oct. 9).
• Stearns, R.E.C. (1893) Scientific results of explorations by the U.S. Fish Commission steamer "Albatross". No. XXV - Report on the mollusk-fauna of the Galapagos Islands, with descriptions of new species. Proceedings of the United States National Museum 16: 353-450.