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:- † Aplexa atava White, 1877
- † Aplexa breviturrita Y.-T. Li, 1983
- † Aplexa canculae Pacaud, 2022
- † Aplexa cotiensis Pacaud, 2022
- † Aplexa delicata Y.-T. Li, 1984
- † Aplexa disjuncta
- † Aplexa dumonti
- † Aplexa fusioidea Tolstikova, 1979
- † Aplexa fuxinensis X.-H. Yu, 1987
- † Aplexa galloprovincialis
- † Aplexa gardanens
- † Aplexa gigantea
- † Aplexa grasseti
- † Aplexa heberti Aplexa hypnorum - the moss bladder snail
- † Aplexa iota Pacaud, 2022
- † Aplexa jaimei
- † Aplexa kasekikabe
- † Aplexa lipasma Y.-T. Li, 1984
- † Aplexa lubrica W. Yü, 1965
- † Aplexa macerata
- † Aplexa macilenta Y.-T. Li, 1983
- † Aplexa magna Y.-T. Li, 1984
- † Aplexa militaria
- † Aplexa montensis
- † Aplexa morrisonana
- † Aplexa morrisoni MacNeil, 1939
- † Aplexa normalis Y.-T. Li, 1985
- † Aplexa preciosa Y.-T. Li, 1984
- † Aplexa primigenia
- † Aplexa prisca
- † Aplexa pseudogigantea
- † Aplexa pulchella
- † Aplexa raris Y.-T. Li, 1984
- † Aplexa ricei
- † Aplexa risleius Pacaud, 2022
- † Aplexa subelongata
- † Aplexa subhypnorum Aplexa venezuelensis
- † Aplexa xichuanensis Y.-T. Li, 1983
- † Aplexa yangxiensis Y.-T. Li, 1987
- † Aplexa zhui Pacaud, 2022
Synonyms
Aplexa adamsiana Tapparone Canefri, 1874: synonym of Glyptophysa novahollandica Aplexa amurensis Starobogatov & Prozorova, 1989: synonym of Amuraplexa amurensis Aplexa aurantia P. P. Carpenter, 1857: synonym of Mexinauta aurantius- † Aplexa brevispirata : synonym of † Aplexa cotiensis Pacaud, 2022
- † Aplexa cylindrica Yen, 1935: synonym of † Pseudophysa cylindrica Aplexa elongata - the lance aplexa: synonym of Sibirenauta elongata
- † Aplexa grabaui Yen, 1935: synonym of † Pseudophysa grabaui Aplexa marmorata : synonym of Stenophysa marmorata Aplexa microstriata Chamberlin & E. G. Berry, 1930: synonym of Utahphysa microstriata : synonym of Physella gyrina Aplexa moskvichevae Starobogatov & Zatravkin, 1989: synonym of Amuraplexa amurensis Aplexa orientalis Starobogatov & Prozorova, 1989: synonym of Amuraplexa amurensis
- † Aplexa ovicylindrica Youluo, 1978 Aplexa princeps : synonym of Mexinauta princeps
- † Aplexa rivalis : synonym of Physella acuta
- † Aplexa robusta Eames, 1952: synonym of † Limacina robusta Aplexa tapanensis : synonym of Mayabina tapanensis Aplexa turrita Tate, 1881: synonym of ''Glyptophysa novahollandica''