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:Vermetus triquetrus

{{Short description|Species of gastropod}}

{{Speciesbox

| image = Vermetus triquetrus 01.JPG

| image_caption =

| taxon = Vermetus triquetrus

| authority = Bivona-Bernardi, 1832

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Vermetus triquetrus is a species of sea snail, a marine gastropod mollusk in the family Vermetidae, the worm snails or worm shells.{{WRMS species|141944|Vermetus triquetrus Bivona Ant., 1832|||Gofas, S. (2009). Vermetus triquetrus Bivona Ant., 1832. In: Bouchet, P.; Gofas, S.; Rosenberg, G. World Marine Mollusca database. Accessed through the World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=141944 on 9 July 2010}}

File:Vermetidae - Vermetus triquetrus.JPG of Italy]]

The genus Vermetus is very ancient. It is known in the fossil records from the Jurassic to the Quaternary (age range: from 164.7 to 0.0 million years ago).[https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=10660 Fossilworks]

Description

These sea snails are characterized by an unusual appearance and lifecycle. The very young snails do not differ from other snails, as they have a conical, spiral shell. Later they fasten to a hard substrate using calcareous secretions, and the shell starts to take the form of an irregular tube. The length of the adult shell is about {{convert|30|-|50|mm}} and the cross section of the shell can reach up to 6 mm in diameter. The small operculum is concave. This is a sessile gastropod the shell of which is cemented to the substrate.{{Gastropods.com|key=3|id=42863|title=Vermetus (Vermetus) triquetrus|access-date=12 January 2019}}[http://doris.ffessm.fr/fiche2.asp?fiche_numero=295 DORIS]

Distribution and habitat

Vermetus triquetrus is widespread in the Mediterranean Sea and in the North Atlantic Ocean. This species inhabits the coastal waters.[http://www.animalbase.uni-goettingen.de/zooweb/servlet/AnimalBase/home/species?id=3686 Animalbase]

Bibliography

  • Keen A.M., A proposed reclassification of the gastropod family Vermetidae in Bulletin of the British Museum (Natural History), vol. 7, nº 3, 1961, pp. 181–213

References

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External links

  • [http://www.xenophora.org/Iconographie/Vermetidae/Vermetus%20triquetrus%201/Cadre%20Vermetus%20triquetrus%201.html Xenophora]
  • [http://www.boldsystems.org/index.php/Taxbrowser_Taxonpage?taxid=265635 Bold Systems]
  • [http://www.aiamitalia.it/index.php?option=com_schede&view=scheda&genere=Vermetus&specie=triquetrus Aiamitalia]

{{Taxonbar|from=Q4010076}}

Category:Vermetidae

Category:Gastropods described in 1832

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