Alvania marchadi
From Wikipedia, the free encyclopedia
| Alvania marchadi | |
|---|---|
 | |
| Shell of Alvania marchadi (specimen at the Natural History Museum, Rotterdam) | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Superfamily: | Rissooidea |
| Family: | Rissoidae |
| Genus: | Alvania |
| Species: | A. marchadi |
| Binomial name | |
| Alvania marchadi (Gofas, 1999) | |
Alvania marchadi is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.[1] It is named after Igor Marche-Marchad.[2]
The length of the shell ranges between 2.25 mm and 2.95 mm and is thickened with a strong rim. The exterior of the shell contains rigid spirals, while the interior is smooth.[2]
The protoconch has 1–3.1.5 convex whorls and "7 spiral flat cords...formed by minute granules".[2]
The teleoconch has 3.3-4.2 convex wholes with "strong, widely spaced, nearly vertical axial folds."[2] The body whorl is rounded with eight spiral and axial folds that fade "towards the periumbilical area".[2]
