Galapagos Species Database
The Galapagos Species Database shares the information about the species from our Natural History Collections.
Zemysina subquadrata
Diplodón cuadrado, Quadrate diplodon
(D. subquadrata) Length: 29 mm; height: 25 mm.
(D. subquadrata) Shallow water (less than 200 m depth).
Domain
Eukaryota
Kingdom
Animalia
Phylum
Mollusca
Class
Bivalvia
Order
Venerida
Superfamily
Ungulinoidea
Family
Ungulinidae
Genus
Zemysina
Species
subquadrata
Taxon category: Accepted
Syn.: Diplodonta pacifica P. Fischer, 1860, Diplodonta subquadrata Carpenter, 1856, Diplodonta subquadrata baltrana Hertlein, 1972, Diplodonta suprema Olsson, 1961 (Horton et al., 2021).
Origin: Native
Map of specimen collection localities or observation records for this species in our collections database.
Distribution: (D. subquadrata) San Ignacio Lagoon, Baja California, the Gulf and south to the Galápagos islands
- Finet, Y. (2001) The marine mollusks of the Galapagos Islands: a documented faunal list. Editions du Muséum d' Histoire naturelle, Genève, 237 pp.
- Hertz, C.M. Myers, B.W. & Gemmell, J. (1982) The distribution of Diplodonta orbellus (Gould, 1851) and a diagnosis of Diplodonta subquadrata (Carpenter, 1856) (Bivalvia: Ungulinidae). The Festivus 14(7): 76-87.
- 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.
- Yuan, Yao-Wu Mabberley, D., Steane, D. A., Olmstead, R. (2010) Further disintegration and redefinition of Clerodendrum (Lamiaceae): Implications for the understanding of the evolution of an intriguing breeding strategy TAXON 59 (1) • February 2010: 125–133
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This page should be cited as follows:
"Galapagos Species Database, Zemysina subquadrata", dataZone. Charles Darwin Foundation, https://datazone.darwinfoundation.org/en/checklist/?species=19947. Accessed 31 October 2026.