''Alviniconcha'' is a genus of deep water

sea snail Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the ...

marine Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine debris * Marine habitats * Marine life * Marine pollution Military * ...

gastropod The gastropods (), commonly known as snails and slugs, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda (). This class comprises snails and slugs from saltwater, from freshwater, and from land. T ...

mollusks in the family

Provannidae Provannidae is a family of deep water sea snails, marine gastropod mollusks in the superfmaily Abyssochrysoidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005 and updated in 2008 by Kaim et al.). MolluscaBase eds. (2021) ...

.Bouchet, P. (2013). Alviniconcha Okutani & Ohta, 1988. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=449922 on 2013-06-25 These snails are part of the fauna of the

hydrothermal vent A hydrothermal vent is a fissure on the seabed from which geothermally heated water discharges. They are commonly found near volcanically active places, areas where tectonic plates are moving apart at mid-ocean ridges, ocean basins, and hotspot ...

s in the Indian and Western Pacific Ocean. These and another genus and species within the same family (''

Ifremeria nautilei ''Ifremeria nautilei'' is a species of large, deepwater hydrothermal vent sea snail, a marine gastropod mollusk in the family Provannidae, and the only species in the genus ''Ifremeria''. This species lives in the South Pacific Ocean Other spe ...

'') are the only known currently existing animals whose nutrition is derived from an endosymbiotic relationship with a member of bacteria from phylum Campylobacterota (formerly Epsilonproteobacteria) occurs as an endosymbiont of the gills of ''Alviniconcha hessleri''.Yohey Suzuki, Takenori Sasaki, Masae Suzuki, Yuichi Nogi, Tetsuya Miwa, Ken Takai, Kenneth H. Nealson & Koki Horikoshi (September 2005) "Novel Chemoautotrophic Endosymbiosis between a Member of the Epsilonproteobacteria and the Hydrothermal-Vent Gastropod ''Alviniconcha'' aff. ''hessleri'' (Gastropoda:

) from the Indian Ocean". '' Applied and Environmental Microbiology'', 71(9): 5440-5450.

Description

The size of the shell varies between 25 mm and 35 mm. The surface of the shell is studded with hairs on the

periostracum The periostracum ( ) is a thin, organic coating (or "skin") that is the outermost layer of the shell of many shelled animals, including molluscs and brachiopods. Among molluscs, it is primarily seen in snails and clams, i.e. in gastropods and ...

, Individuals variation in shell size and the arrangement of the hairs, but the variation does not correspond to individual species.

Species

Until 2014, ''Alviniconcha'' consisted solely of the species ''Alviniconcha hessleri'', described in 1988. In 2014, increased recognition of genetic differences between populations resulted in the formal description of five cryptic species within the former ''A. hessleri'' that are morphologically indistinguishable from each other but that have consistent differences in

mitochondrial DNA Mitochondrial DNA (mtDNA or mDNA) is the DNA located in mitochondria, cellular organelles within eukaryotic cells that convert chemical energy from food into a form that cells can use, such as adenosine triphosphate (ATP). Mitochondrial D ...

sequences. Species within the genus ''Alviniconcha'' include: * ''Alviniconcha adamantis'' S.B. Johnson, Warén, Tunnicliffe, Van Dover, Wheat, Schultz & Vrijenhoek, 2014 * ''Alviniconcha boucheti'' S.B. Johnson, Warén, Tunnicliffe, Van Dover, Wheat, Schultz & Vrijenhoek, 2014 * ''Alviniconcha hessleri'' Okutani & Ohta, 1988 * ''Alviniconcha kojimai'' S.B. Johnson, Warén, Tunnicliffe, Van Dover, Wheat, Schultz & Vrijenhoek, 2014 * ''Alviniconcha marisindica'' Okutani, 2014 * ''Alviniconcha strummeri'' S.B. Johnson, Warén, Tunnicliffe, Van Dover, Wheat, Schultz & Vrijenhoek, 2014 (named after punk musician Joe Strummer of The Clash)A Snail So Hardcore It's Named After A Punk Rocker
at National Public Radio; published December 20, 2014; retrieved March 18, 2015

References

* Healy, J.M. 1992, ''Dimorphic spermatozoa of the hydrothermal vent prosobranch Alviniconcha hessleri: systematic importance and comparison with other caenogastropods''; Bull. Mus. Natl. His. Nat. Paris 4 sér A 14: 273-291 * Desbruyères, D., M. Segonzac & M. Bright (eds.). 2006. ''Handbook of Deep-sea Hydrothermal Vent Fauna.'' Second Edition Denisia 18:1-544. (Copepods 316-355)(Polychaeta 183-296)

External links

* Provannidae {{Provannidae-stub