''Asthelys'' is a genus of

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

Seguenziidae Seguenziidae is a family of very small deepwater sea snails, marine gastropod mollusks in the superfamily Seguenzioidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).Bouchet, P. (2012). Seguenziidae. Accessed through ...

Description

The conical shell lacks axial riblets and a peripheral carina but has a punctate microsculpture. The midwhorl angulation is initially absent, but present on later

whorl A whorl ( or ) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs). Whorls in nature File:Photograph and axial plane flo ...

s. The shell contains no spiral lirae. The U-shaped posterior sinus is shallow. The basal sinus is present, but there is no anterolateral sinus. The columella has no sinus or tooth. Tha aperture has a rhomboidal shape. There is no umbilical septum.

Radula The radula (, ; plural radulae or radulas) is an anatomical structure used by molluscs for feeding, sometimes compared to a tongue. It is a minutely toothed, chitinous ribbon, which is typically used for scraping or cutting food before the food ...

: the rachidian tooth is broader than high and has lateral wings prominent. The lateral tooth cusp is broad. There are less than 10 marginal tooth pairs.

Species

Species within the genus ''Asthelys'' include: * ''

Asthelys antarctica ''Asthelys antarctica'' is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae Seguenziidae is a family of very small deepwater sea snails, marine gastropod mollusks in the superfamily ...

'' Marshall, 1988 * ''

Asthelys careyi ''Asthelys'' is a genus of sea snails, marine gastropod mollusks in the family Seguenziidae. Description The conical shell lacks axial riblets and a peripheral carina but has a punctate microsculpture. The midwhorl angulation is initially abs ...

'' Geiger, 2017 * ''

Asthelys depressa ''Asthelys depressa'' is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.WoRMS (2012). ''Asthelys depressa''. Retrieved through: World Register of Marine Species at http://www.marinesp ...

'' Marshall, 1991 * ''

Asthelys hyeresensis ''Asthelys'' is a genus of sea snails, marine (ocean), marine gastropod mollusks in the family (biology), family Seguenziidae. Description The conical shell lacks axial riblets and a peripheral carina but has a punctate microsculpture. The midwh ...

'' Hoffman, Gofas & Freiwald, 2020 * ''

Asthelys munda ''Asthelys munda'' is a species of sea snail, a marine gastropod mollusk in the family Seguenziidae. This species is spelled as ''Asthelys mundus'' in CLEMAM. Description (Original description by Watson) The height of the shell attains 3.3& ...

'' (

Watson Watson may refer to: Companies * Actavis, a pharmaceutical company formerly known as Watson Pharmaceuticals * A.S. Watson Group, retail division of Hutchison Whampoa * Thomas J. Watson Research Center, IBM research center * Watson Systems, make ...

, 1879) * ''

Asthelys nitidula ''Asthelys nitidula'' is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.WoRMS (2012). ''Asthelys nitidula''. Retrieved through: World Register of Marine Species at http://www.marinesp ...

'' Marshall, 1991 * ''

Asthelys semiplicata ''Asthelys semiplicata'' is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.WoRMS (2012). ''Asthelys semiplicata'' Marshall, 1991. Retrieved through: World Register of Marine Species a ...

'' Marshall, 1991 * ''

Asthelys simplex ''Asthelys simplex'' is a species of extremely small deep water sea snail, a marine gastropod mollusk in the family Seguenziidae.Rosenberg, G. (2012). ''Asthelys simplex'' (Watson, 1879). Retrieved through: World Register of Marine Species a ...

'' (

, 1879)

References

* Marshall, B. A. (1988). ''New Seguenziidae (Mollusca: Gastropoda) from the Tasman, South Pacific, and Southern Antilles Basins''. New Zealand Journal of Zoology 15: 235-247 * Marshall B.A. (1991). ''Mollusca Gastropoda : Seguenziidae from New Caledonia and the Loyalty Islands''. In A. Crosnier & P. Bouchet (Eds) Résultats des campagnes Musorstom, vol. 7. Mémoires du Muséum National d'Histoire Naturelle, A, 150:41-109.

External links

Quinn J. (1987). ''A revision of the Seguenziacea Verrill, 1884. II. The new genera Hadroconus, Rotellenzia, and Asthelys''. Nautilus 101(2): 59-68
{{Taxonbar, from=Q4810830 Seguenziidae Gastropod genera