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Erronea onyx

{{Short description|Species of gastropod}}

{{Speciesbox

| image = Erronea_onyx_01.JPG

| image_caption = Five views of a shell of Erronea onyx

| genus = Erronea

| species = onyx

| authority = (Linnaeus, 1758)

| synonyms_ref =

| synonyms = *Cypraea onyx Linnaeus, 1758 (basionym)

}}

Erronea onyx, common name the onyx cowry, is a species of sea snail, a cowry, a marine gastropod mollusk in the family Cypraeidae, the cowries.{{WRMS species|216860|Erronea onyx (Linnaeus)|||WoRMS (2009). Erronea onyx (Linnaeus). Accessed through the World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=216860 on 21 October 2010}}

Description

File:Cypraea_onyx_S2-21_37mm.jpg

The shells of these quite common cowries reach on average {{convert|32|-|38|mm}} of length, with a minimum size of {{convert|24|mm}} and a maximum size of {{convert|57|mm}}. The dorsum surface of Erronea onyx is smooth, shiny and generally golden brown, with alternating longitudinal fuzzy bands of translucent bluish and reddish colors (hence the Latin name onyx). The base and the margins are dark brown or black, sometimes the teeth are orange. In the living cowries mantle is dark brown, quite thin, with bluish papillae.

File:Cypraeidae - Erronea onyx.JPG

File:Cypraeidae - Erronea onyx-1.JPG

Distribution

This species occurs the Indian Ocean on the coasts of Aldabra, the Comores, Kenya, Madagascar, Mauritius, Mozambique, Réunion, the Seychelles, Tanzania and in the Pacific Ocean along East China, Thailand, northern Australia, Indonesia, Philippines, Palau Islands and Solomon Islands.

Habitat

Erronea onyx lives in tropical and subtropical zones, in shallow subtidal water up to {{convert|5|-|25|m}} depth, mainly in muddy areas or sandy sea floor, feeding on algae or coral polyps.

Subspecies

What used to be called Erronea onyx adusta, Lamarck, 1810 is now accepted as Erronea adusta.{{WRMS species|223986|Erronea onyx adusta (Lamarck, 1810)|||MolluscaBase (2018). Erronea onyx adusta (Lamarck, 1810). Accessed through the World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=2223986 on 21 June 2018}}

References

{{Reflist}}

  • Verdcourt, B. (1954). The cowries of the East African Coast (Kenya, Tanganyika, Zanzibar and Pemba). Journal of the East Africa Natural History Society 22(4) 96: 129-144, 17 pls.
  • Burgess, C.M. (1970). The Living Cowries. AS Barnes and Co, Ltd. Cranbury, New Jersey

External links

  • {{Gastropods.com|key=2|id=82|title=Erronea onyx|access-date=17 January 2019}}
  • [http://www.marinespecies.org/aphia.php?p=taxdetails&id=216750 WoRMS]
  • [http://www.flmnh.ufl.edu/cowries/onyx.htm Flmnh]
  • [http://clade.ansp.org/obis/search.php/52793 Clade]

{{Taxonbar|from=Q5395676}}

onyx

Category:Gastropods described in 1758

Category:Taxa named by Carl Linnaeus

{{Cypraeidae-stub}}