†Paraprosostenia is a fossil genus

Genus

In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...

 of prehistoric freshwater snail

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....

s, aquatic

Aquatic animal

An aquatic animal is an animal, either vertebrate or invertebrate, which lives in water for most or all of its life. It may breathe air or extract its oxygen from that dissolved in water through specialised organs called gills, or directly through its skin. Natural environments and the animals that...

 gastropod mollusks in the family Pomatiopsidae

Pomatiopsidae

Pomatiopsidae is a family of small mainly freshwater snails with gills and an operculum, aquatic gastropod mollusks in the superfamily Rissooidea ....

.

Species

Species within the genus Paraprosostenia include:

• Paraprosostenia minuta Annandale, 1919 - type species, fossil of Pleistocene
  Pleistocene
  The Pleistocene is the epoch from 2,588,000 to 11,700 years BP that spans the world's recent period of repeated glaciations. The name pleistocene is derived from the Greek and ....
  
   of Namma in northern Burma, The length of the shell is 6 mm. It was found in freshwater lake beds, so it is presumed to be a freshwater species as is the case in all other Triculinae.

Davis (1979) classified also four extant species within the genus Paraprosostenia. Later Davis (1981) referred number of species in Paraprososthenia to be ten. Subsequently Davis et al. (1981) restricted the genus Paraprosostenia to the Pleistocene of Burma. These four extant species were moved to the newly established genus Neoprososthenia

Neoprososthenia

Neoprososthenia is a genus of freshwater snails with gills and an operculum, aquatic gastropod mollusks in the family Pomatiopsidae.- Species :The genus was established for extant species that were previously placed in the genus Paraprososthenia....

:

• (extant) Paraprososthenia hanseni Brandt, 1970 is a synonym of Neoprososthenia hanseni (Brandt, 1970)
• (extant) Paraprososthenia iijimai Brandt, 1970 is a synonym of Neoprososthenia iijimai (Brandt, 1970)
• (extant) Paraprososthenia levayi (Bavay, 1895) is a synonym of Neoprososthenia levayi (Bavay, 1895)
• (extant) Paraprososthenia poirieri (Brandt, 1970) is a synonym of Neoprososthenia poirieri (Brandt, 1970)