Alvania chilensis | |
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Shell of Alvania chilensis (holotype) | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Gastropoda |
Subclass: | Caenogastropoda |
Order: | Littorinimorpha |
Superfamily: | Rissooidea |
Family: | Rissoidae |
Genus: | Alvania |
Species: | †A. chilensis
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Binomial name | |
†Alvania chilensis (R. A. Philippi, 1887)
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Synonyms | |
† Rissoa chilensis R. A. Philippi, 1887 · |
Alvania chilensis is an extinct species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae. [1]
The length of the shell attains 1¾ mm.
The minute shell has a globose-conical shape and is imperforate. The shell contains 5½ whorls. The sculpture consists of many longitudinal ribs. The aperture is ovate-orbicular. The inner lip is incrassate.
Fossils of this species were found in Tertiary strata in Chile.