Aplexa

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الموسوعة الحرة

Aplexa is a genus of small, left-handed or sinistral, air-breathing freshwater snails, aquaticpulmonategastropodmollusks in the family Physidae.[2]

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 adamsianaTapparone Canefri, 1874: synonym of Glyptophysa novahollandica(Bowdich, 1822)
  • Aplexa amurensisStarobogatov & Prozorova, 1989: synonym of Amuraplexa amurensis(Starobogatov & Prozorova, 1989) (superseded combination)
  • Aplexa aurantiaP. P. Carpenter, 1857: synonym of Mexinauta aurantius(P. P. Carpenter, 1857) (original combination)
  • † Aplexa brevispirata(Cossmann & Pissaro, 1913): synonym of † Aplexa cotiensisPacaud, 2022 (junior homonym of Physa (Isodora) tchadiensis brevispirataGermain, 1905; Aplexa cotiensisPacaud, 2022 is a replacement name)
  • † Aplexa cylindricaYen, 1935: synonym of † Pseudophysa cylindrica(Yen, 1935) (superseded combination)
  • Aplexa elongata(Say, 1821) - the lance aplexa: synonym of Sibirenauta elongata(Say, 1821)
  • † Aplexa grabauiYen, 1935: synonym of † Pseudophysa grabaui(Yen, 1935) (superseded combination)
  • Aplexa marmorata(Guilding, 1828): synonym of Stenophysa marmorata(Guilding, 1828) (superseded combination)
  • Aplexa microstriataChamberlin & E. G. Berry, 1930: synonym of Utahphysa microstriata(Chamberlin & E. G. Berry, 1930): synonym of Physella gyrina(Say, 1821) (original combination)
  • Aplexa moskvichevaeStarobogatov & Zatravkin, 1989: synonym of Amuraplexa amurensis(Starobogatov & Prozorova, 1989)
  • Aplexa orientalisStarobogatov & Prozorova, 1989: synonym of Amuraplexa amurensis(Starobogatov & Prozorova, 1989)
  • † Aplexa ovicylindricaYouluo, 1978 (unavailable name)
  • Aplexa princeps(J. S. Phillips, 1846): synonym of Mexinauta princeps(J. S. Phillips, 1846) (superseded combination)
  • † Aplexa rivalis(Maton & Rackett, 1807): synonym of Physella acuta(Draparnaud, 1805) (junior synonym)
  • † Aplexa robustaEames, 1952: synonym of † Limacina robusta(Eames, 1952) (original combination)
  • Aplexa tapanensis(Crosse & P. Fischer, 1882): synonym of Mayabina tapanensis(Crosse & P. Fischer, 1882) (unaccepted combination)
  • Aplexa turritaTate, 1881: synonym of Glyptophysa novahollandica(Bowdich, 1822) (junior synonym)

References

  1. ↑Fleming J. (1830). Mollusca. pp. 598-635, in: Brewster D. The Edinburgh Encyclopædia. In eighteen volumes. Volume XIV [= 14] [MED-MUS]. pp. [1], 1-748, Pl. CCCLXXII-CCCC [= 372-400]. Edinburgh. (Blackwood).
  2. ↑MolluscaBase eds. (2025). MolluscaBase. Aplexa J. Fleming, 1820. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=820399 on 2025-09-17

Further reading