Galapagos Species Database
The Galapagos Species Database shares the information about the species from our Natural History Collections.
Cypraecassis coarctata
yelmo boca ancha
Length: 70 mm
Shallow water (less than 200 m depth), subtidal
Domain
Eukaryota
Kingdom
Animalia
Phylum
Mollusca
Class
Gastropoda
Order
Littorinimorpha
Superfamily
Tonnoidea
Family
Cassidae
Genus
Cypraecassis
Species
coarctata
Taxon category: Accepted
Syn.: Cassis coarctata G. B. Sowerby I, 1825 · unaccepted (original combination), Cypraecassis (Levenia) coarctata (G. B. Sowerby I, 1825) (Horton et al., 2021). AMNH: 14379, 88656, ANSP: 42619, 225772, CAS: severa specimens, MHNG: 12097, 12098, 12099, CDRS: 289, 394, 907
Map of specimen collection localities or observation records for this species in our collections database.
Distribution: Gulf of California to Perú and Ecuador (Galapagos Islands)
- 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.
You are welcome to download and use the information found in this page, acknowledging its source.
This page should be cited as follows:
"Galapagos Species Database, Cypraecassis coarctata", dataZone. Charles Darwin Foundation, https://datazone.darwinfoundation.org/en/checklist/?species=8680. Accessed 30 October 2026.