Galapagos Species Database
The Galapagos Species Database shares the information about the species from our Natural History Collections.
Cypraecassis tenuis
yelmo de concha delgada, Thin shelled helmet
Length: 145 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
tenuis
Taxon category: Accepted
Syn.: Cassis tenuis; AMNH: 23340, 110390, 110713, ANSP: 81747, 81755, 153392, LACM: 71-54, A.2777, C-473, CAS: several lots (ex.: 46280, 58108), BMNH: acc. no. 2271: 1 specimen (Charles Lyell coll., C. Darwin material), MHNG: 12094, 12095, 12096 (Holotype of Cassis massenae Kiener, 1835), CDRS: 236, 1013, FNRS-Belgian expedition to the Galapagos, 1984, MHNG: expedition to the Galapagos, 1993
Origin: Native
Map of specimen collection localities or observation records for this species in our collections database.
Distribution: Gulf of California to Ecuador (Galapagos Islands)
- Constant, P. (2007) Marine Life of the Galapagos. The Diver's guide to Fishes, Whales, Dolphins and marine Invertebrates, 307 pp.
- Edgar, G.J. Fariña, J.M., Calvopiña, M., Martínez, C. & Banks, S. (2002) Comunidades submareales rocosas II: Peces y macroinvertebrados móviles. In: Danulat, E. & Edgar, G.J. (eds.) (2002): Reserva Marina de Galápagos. Línea Base de la Biodiversidad. Fundación Charles Darwin/Servicio Parque Nacional Galápagos, Santa Cruz, Galápagos, Ecuador, p. 68-97.
- 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.
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 tenuis", dataZone. Charles Darwin Foundation, https://datazone.darwinfoundation.org/en/checklist/?species=8681. Accessed 8 June 2026.