Alvania ignota
| Alvania ignota | |
|---|---|
| |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Family: | Rissoidae |
| Genus: | Alvania |
| Species: | A. ignota
|
| Binomial name | |
| Alvania ignota Cecalupo & Perugia, 2009[1]
| |
Alvania ignota is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.[2]
Description
[edit]The length of the shell is of small size (holotype 2,2 x 1,2 mm), the shell is conic-ovate, thick, has beaded spiral cords and convex whorls. It is imperforate, vitreous, and colourless.
Protoconch: 1,5 whorls (at 40X smooth).
Teleoconch: three convex whorls, suture impressed and wide. In the last whorl there are 7 spiral cords (3 of which are in the second whorl) with strongly circular beads when they are crossed by about 20 weaker axial ribs. The distance between 2° and 3° cord is larger. The mouth of the snail is oval in shape, with the outer lips having a strong varix. The snail has no umbilicus, while the Operculum and soft parts are unknown.[3]
Distribution
[edit]This species occurs in the Indian Ocean off Southern Madagascar; Réunion; Mauritius.
References
[edit]- ^ Cecalupo & Perugia (2009). Malacologia Mostra Mondiale 63 (2) : 21. World Register of Marine Species, Retrieved 08/09/10.
- ^ Alvania ignota Cecalupo & Perugia, 2009. WoRMS (2010). Alvania ignota Cecalupo & Perugia, 2009. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.eu/aphia.php?p=taxdetails&id=457017 on 9 August 2010 .
- ^ Jan, Delsing (9 February 2025). "Alvania ignota A. Cecalupo & I. Perugia, 2009". www.biolib.cz. Retrieved 9 February 2025.
{{cite web}}: CS1 maint: url-status (link)
- Cecalupo & Perugia (2009). Malacologia Mostra Mondiale 63 (2) : 21
