Asthelys
| Asthelys | |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Family: | Seguenziidae |
| Subfamily: | Asthelysinae |
| Genus: | Asthelys Quinn, 1987 [1] |
| Type species | |
| Basilissa munda Watson, R.B., 1879 | |
Asthelys is a genus of sea snails, marine gastropod mollusks in the family Seguenziidae.[2]
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 whorls. 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 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.[3]
Species
Species within the genus Asthelys include:
- Asthelys antarctica Marshall, 1988
- Asthelys depressa Marshall, 1991
- Asthelys munda (Watson, 1879)[4]
- Asthelys nitidula Marshall, 1991
- Asthelys semiplicata Marshall, 1991
- Asthelys simplex (Watson, 1879)
References
- ^ Quin 1987. A revision of the Seguenziacea Verrill, 1884 (Gastropoda: Prosobranchia). II. The new genera Hadroconus, Rotellenzia, and Asthelys. Nautilus 10 I (2): 59-68
- ^ Asthelys Quinn, 1987. Retrieved through: World Register of Marine Species on 18 April 2010.
- ^ James F. Quinn Jr., (1991), Systematic Position of Basilissopsis and Guttula, and a Discussion of the Phylogeny of the Seguenzioidea (Gastropoda: Prosobranchia), Bulletin of Marine Science, Volume 49, Numbers 1-2, September 1991 , pp. 575-598(24)[permanent dead link]
- ^ Asthelys mundus (Watson, 1879). Retrieved through: World Register of Marine Species on 18 April 2010.
- 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.