Acochlidiidae are a taxonomic family of shell-less freshwater gastropods

Freshwater snail

A freshwater snail is one kind of freshwater mollusc, the other kind being freshwater clams and mussels, i.e. freshwater bivalves. Specifically a freshwater snail is a gastropod that lives in a watery non-marine habitat. The majority of freshwater gastropods have a shell, with very few exceptions....

 (one of them Palliohedyle weberi lives in brackish waters), aquatic gastropod mollusks within the clade Acochlidiacea

Acochlidiacea

Acochlidiacea, common name acochlidians, are a taxonomic clade of very unusual sea snails and sea and freshwater slugs, aquatic gastropod mollusks within the large clade Heterobranchia...

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2005 taxonomy

Acochlidiidae has been classified as the only family within the superfamily Acochlidioidea Küthe, 1935 in the taxonomy of Bouchet & Rocroi

Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005)

The taxonomy of the Gastropoda as it was revised by Philippe Bouchet and Jean-Pierre Rocroi is currently the most up-to-date overall system for classifying gastropod mollusks...

 (2005). Palliohedylidae has been classified as the only family within the superfamily Palliohedyloidea.

2010 taxonomy

Schrödl & Neusser (2010) have redefined the taxonomy of Acochlidiacea in 2010 and family Acochlidiidae is in the clade Hedylopsacea.

Genera

According to the Schrödl & Neusser (2010) there are three genera in the family Acochlidiidae:

Acochlidium

Acochlidium

Acochlidium is a genus of freshwater slugs, an aquatic gastropod mollusks in the family Acochlidiidae.Acochlidium species have no shell.-Species:Species within the genus Acochlidium include:* Acochlidium amboinense Strubell, 1892...

Strubel, 1892

• Acochlidium amboinense Strubell, 1892
• Acochlidium bayerfehlmanni Wawra, 1980
• Acochlidium fijiiensis
  Acochlidium fijiiensis
  Acochlidium fijiiensis is a species of freshwater gastropod, an aquatic gastropod mollusk within the family Acochlidiidae.Acochlidium fijiiensis has no shell.It lives in two rivers on Fiji.- Further reading :...
  
  Haynes & Kenchington, 1991

Palliohedyle Rankin, 1979

• Palliohedyle sutteri - synonym: Acochlidium sutteri Wawra
• Palliohedyle weberi - synonym: Acochlidium weberi Bergh, 1896

Strubellia Odhner, 1937

• Strubellia paradoxa (Strubell, 1892) - synonym: Acochlidium paradoxum Strubell