Acroloxidae

Acroloxidae, commonly known as river limpets, are a taxonomic family of very small, freshwater snails, aquatic pulmonate gastropod limpet-like mollusks with a simple flattened conical shell in the clade Hygrophila.

Acroloxidae
A left side view of a live Acroloxus lacustris
Two views of a shell of Acroloxus lacustris
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Superorder:	Hygrophila
Superfamily:	Lymnaeoidea
Family:	Acroloxidae Thiele, 1931
Diversity[1]
About 40 freshwater species

Acroloxidae is the only family within the superfamily Acroloxoidea (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).

Distribution

Worldwide.^[2]

Anatomy

Pulmones are reduced. Sexual cavity and accessory gills are on the right side.^[2]

Genera

Genera within the family Acroloxidae include:

• Acroloxus Beck, 1838^[3] - type genus^[4]
• Baicalancylus Starobogatov, 1967^[4]
• Frolikhiancylus Sitnikova & Starobogatov, 1993
• Gerstfeldtiancylus Starobogatov, 1989^[4][5]
• Pseudancylastrum Lindholm, 1909^[4][6]

Synonyms

• Costovelletia Starobogatov, 1991: synonym of Acroloxus H. Beck, 1838 (a junior synonym)
• Dinarancylus Starobogatov, 1991: synonym of Acroloxus H. Beck, 1838 (a junior synonym)
• Velletia J. E. Gray, 1840: synonym of Acroloxus H. Beck, 1838 (junior objective synonym)