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Aplexa

Aplexa is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Physidae.

Shell description

These small snails are quite distinctive, because they have shells that are sinistral, which means that if you hold the shell such that the spire is pointing up, then the aperture is on the left-hand side.

The shells of Aplexa species have a long and large aperture, a relatively high and pointed spire, and no operculum. The shells are thin and corneous and rather transparent.

Only two species are still extant.

Species

Species in the genus Aplexa include:

Synonyms

  • Aplexa adamsiana <small>Tapparone Canefri, 1874</small>: synonym of Glyptophysa novahollandica <small>(Bowdich, 1822)</small>
  • Aplexa amurensis <small>Starobogatov & Prozorova, 1989</small>: synonym of Amuraplexa amurensis <small>(Starobogatov & Prozorova, 1989)</small> (superseded combination)
  • Aplexa aurantia <small>P. P. Carpenter, 1857</small>: synonym of Mexinauta aurantius <small>(P. P. Carpenter, 1857)</small> (original combination)
  • † Aplexa brevispirata <small>(Cossmann & Pissaro, 1913)</small>: synonym of † Aplexa cotiensis <small>Pacaud, 2022</small> (junior homonym of Physa (Isodora) tchadiensis brevispirata <small>Germain, 1905</small>; Aplexa cotiensis <small>Pacaud, 2022</small> is a replacement name)
  • † Aplexa cylindrica <small>Yen, 1935</small>: synonym of † Pseudophysa cylindrica <small>(Yen, 1935)</small> (superseded combination)
  • Aplexa elongata <small>(Say, 1821)</small> - the lance aplexa: synonym of Sibirenauta elongata <small>(Say, 1821)</small>
  • † Aplexa grabaui <small>Yen, 1935</small>: synonym of † Pseudophysa grabaui <small>(Yen, 1935)</small> (superseded combination)
  • Aplexa marmorata <small>(Guilding, 1828)</small>: synonym of Stenophysa marmorata <small>(Guilding, 1828)</small> (superseded combination)
  • Aplexa microstriata <small>Chamberlin & E. G. Berry, 1930</small>: synonym of Utahphysa microstriata <small>(Chamberlin & E. G. Berry, 1930)</small>: synonym of Physella gyrina <small>(Say, 1821)</small> (original combination)
  • Aplexa moskvichevae <small>Starobogatov & Zatravkin, 1989</small>: synonym of Amuraplexa amurensis <small>(Starobogatov & Prozorova, 1989)</small>
  • Aplexa orientalis <small>Starobogatov & Prozorova, 1989</small>: synonym of Amuraplexa amurensis <small>(Starobogatov & Prozorova, 1989)</small>
  • † Aplexa ovicylindrica <small>Youluo, 1978</small> (unavailable name)
  • Aplexa princeps <small>(J. S. Phillips, 1846)</small>: synonym of Mexinauta princeps <small>(J. S. Phillips, 1846)</small> (superseded combination)
  • † Aplexa rivalis <small>(Maton & Rackett, 1807)</small>: synonym of Physella acuta <small>(Draparnaud, 1805)</small> (junior synonym)
  • † Aplexa robusta <small>Eames, 1952</small>: synonym of † Limacina robusta <small>(Eames, 1952)</small> (original combination)
  • Aplexa tapanensis <small>(Crosse & P. Fischer, 1882)</small>: synonym of Mayabina tapanensis <small>(Crosse & P. Fischer, 1882)</small> (unaccepted combination)
  • Aplexa turrita <small>Tate, 1881</small>: synonym of Glyptophysa novahollandica <small>(Bowdich, 1822)</small> (junior synonym)

References

External links

Further reading

  • "Genus summary for Aplexa". AnimalBase.
  • Janus, Horst, 1965. ‘’The young specialist looks at land and freshwater molluscs’’, Burke, London