Galapagos Species Database

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

Supplanaxis planicostatus (G. B. Sowerby I, 1825)

Planáxido de costillas parejas, Even -ribbed planaxis

(P. planicostatus) Length: 28 mm.

(P. planicostatus) Shallow water (less than 200 m depth), under rocks.

Taxonomy

Domain
Eukaryota

Kingdom
Animalia

Phylum
Mollusca

Class
Gastropoda

Order
[unassigned] Caenogastropoda

Superfamily
Cerithioidea

Family
Planaxidae

Genus
Supplanaxis

Species
planicostatus

Taxon category: Accepted

Syn.: Planaxis canaliculata Duval, 1840, Planaxis canaliculatus Duval, 1840, Planaxis circinatus Lesson, 1842, Planaxis planicostatus G. B. Sowerby I, 1825 (Horton et al., 2021).; (P. planicostatus) AMNH: 16467, 110719, ANSP: 18245, 81875, 153194, 185711, 199805, LACM: 66-118, AHF 188-34, BMNH: 1966623 (Syntypes), acc. no. 2271: 2 specimens (Charles Lyell coll., C. Darwin material), MHNG: 11454, CDRS: 811, FNRS-Belgian expedition to the Galapagos, 1984, MHNG: expedition to the Galapagos, 1993

Origin: Native

Distribution

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

Distribution: (P. planicostatus) Mexico (Mazatlan) to Perú and Ecuador (Galapagos Islands)

References

  • Adams, C.B. (1852) Catalogue of shells collected at Panama, with notes on their synonymy, station, and geographical distribution. Annals of Lyceum of Natural History of New York 5: 229-549.
  • 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, Supplanaxis planicostatus", dataZone. Charles Darwin Foundation, https://datazone.darwinfoundation.org/en/checklist/?species=19950. Accessed 4 June 2026.