Galapagos Species Database

The Galapagos Species Database shares the information about the species from our Natural History Collections.

Cypraecassis tenuis (W. Wood, 1828)

yelmo de concha delgada, Thin shelled helmet

Length: 145 mm.

Shallow water (less than 200 m depth), subtidal.

Taxonomy

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

Status

IUCN Red List Category: Not evaluated

Distribution

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

Distribution: Gulf of California to Ecuador (Galapagos Islands)

References

  • 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.