| Alvania gradatoides | |
|---|---|
| | |
| Shell of Alvania gradatoides (specimen at the Auckland Museum) | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Caenogastropoda |
| Order: | Littorinimorpha |
| Superfamily: | Rissooidea |
| Family: | Rissoidae |
| Genus: | Alvania |
| Species: | A. gradatoides |
| Binomial name | |
| Alvania gradatoides | |
| Synonyms [2] | |
| |
Alvania gradatoides is a species of minute sea snail with an operculum, a marine gastropod mollusk in the family Rissoidae. [2]
The length of the shell attains 3 mm, its diameter 1.6 mm.
Alvania gradatoides was originally discovered and described as Linemera gradatoides by Harold John Finlay in 1930. [1]

Alvania gallinacea is a species of minute sea snail with an operculum, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania angioyi is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania auberiana is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania cancapae is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania cimicoides is a species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.
Alvania clathrella is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania colossophilus is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania datchaensis is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania dianiensis is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania dictyophora is a species of minute sea snail, a marine gastropod mollusc or micromollusk in the family Rissoidae.
Alvania fractospira is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania mediolittoralis is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania spinosa is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania subcalathus is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania subcrenulata is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania watsoni is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Neoguraleus murdochi is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.

Haurakia is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Rissoidae.
Alvania bartolinorum is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.
Alvania bozcaadensis is a species of minute sea snail, a marine gastropod mollusk or micromollusk in the family Rissoidae.