There are over 270 species within the land snail genus Amphidromus.. The precise number is subject to change due to ongoing taxonomic revisions These species used to be divided into three subgenera:, They are all accepted as an alternate representation
subgenus Amphidromus Albers, 1850 subgenus Goniodromus Bülow, 1905: The shell closely resembles that of Amphidromus, differing primarily in the aperture: rather than being uniformly rounded, the extension of the columella forms an angular spout with the anterior lip, analogous to the siphonal canal found in marine gastropods. subgenus Syndromus Pilsbry, 1900: all species of the subgenus Syndromus are sinistral with two exceptions: amphidromine Amphidromus glaucolarynx and dextral Amphidromus kuehni.
Subgenus Syndromus subgenus Syndromus Pilsbry, 1900 All species of the subgenus Syndromus are sinistral with two exceptions: amphidromine Amphidromus glaucolarynx and dextral Amphidromus kuehni.
Amphidromus glaucolarynx (Dohrn, 1861) - This is the only one amphidromine (left-handed and right-handed snails occur in the population) species in the subgenus Syndromus. Amphidromus xiengkhaungensis Inkhavilay & Panha, 2017 Amphidromus sp. - an undescribed species from Lampung, Indonesia
Subgenus ?
Amphidromus suspectus Amphidromus suspectus albolabiata Fulton, 1896 Amphidromus thanhhoaensis Thach & F. Huber, 2016 Amphidromus theobaldianus (Benson, 1857) Amphidromus ventrosulus Möllendorff, 1900 Amphidromus versicolor Fulton, 1896 Amphidromus webbi Fulton, 1907 Amphidromus webbi babiensis Laidlaw, 1954 Amphidromus webbi simalurensis Laidlaw, 1954 Amphidromus winteri Amphidromus winteri inauris Fulton, 1896 Amphidromus zebrinus (Pfeiffer, 1861)
Synonyms Amphidromus annamiticus (Crosse & Fischer, 1863): synonym of Amphidromus inversus annamiticus (Crosse & P. Fischer, 1863) Amphidromus apoensis Bartsch, 1917: synonym of Amphidromus maculiferus apoensis Bartsch, 1917 (original rank) Amphidromus asper Haas, 1934: synonym of Amphidromus buelowi Fruhstorfer, 1905 Amphidromus attapeuensis Thach & F. Huber, 2017 : synonym of Amphidromus haematostoma Möllendorff, 189 (junior subjective synonym) Amphidromus aureus (Dillwyn, 1817) : synonym of Amphidromus perversus var. aureus (Dillwyn, 1817) : synonym of Amphidromus perversus (Linnaeus, 1758) (junior synonym) Amphidromus baerorum Thach, 2017 : synonym of Amphidromus smithii Fulton, 1896 (junior subjective synonym) Amphidromus berschaueri Thach, 2018: synonym of Amphidromus reflexilabris Schepman, 1892 (incorrect original spelling: named after David Berschauer; junior synonym) Amphidromus bilatanensis Bartsch, 1917: synonym of Amphidromus roeseleri Möllendorff, 1894 Amphidromus bulowi Fruhstorfer, 1905 : synonym of Amphidromus buelowi Fruhstorfer, 1905 (misspelling - incorrect subsequent spelling) Amphidromus bülowi Fruhstorfer, 1905 : synonym of Amphidromus buelowi Fruhstorfer, 1905 (correction of diacritical mark mandatory) Amphidromus calista Pilsbry, 1900: synonym of Amphidromus chloris (Reeve, 1848) : synonym of Amphidromus sulphuratus (Hombron & Jacquinot, 1847) (junior subjective synonym) Amphidromus chloris Reeve, 1848: synonym of Amphidromus sulphuratus (Hombron & Jacquinot, 1847) Amphidromus contusus (Reeve, 1848): synonym of Amphidromus inversus (O. F. Müller, 1774) (junior subjective synonym) Amphidromus eichhorsti Thach, 2020: synonym of Amphidromus cruentatus (Morelet, 1875) (junior subjective synonym) Amphidromus eques (L. Pfeiffer, 1857): synonym of Amphidromus atricallosus (A. Gould, 1843) (unaccepted > junior subjective synonym) Amphidromus franzhuberi Thach, 2016: synonym of Amphidromus buelowi Fruhstorfer, 1905 (unaccepted > junior subjective synonym) Amphidromus fuscolabris Möllendorff, 1898: synonym of Amphidromus cruentatus (Morelet, 1875) (junior subjective synonym) Amphidromus hueae Thach & F. Huber, 2016: synonym of Amphidromus comes (L. Pfeiffer, 1861) (junior subjective synonym) Amphidromus interruptus (O. F. Müller, 1774): synonym of Amphidromus perversus var. interruptus (O. F. Müller, 1774): synonym of Amphidromus perversus (Linnaeus, 1758) (superseded combination) Amphidromus johnstanisici Thach & Huber, 2017: synonym of Amphidromus placostylus Möllendorff, 1900 (junior subjective synonym) Amphidromus lamdongensis Thach & F. Huber, 2016: synonym of Amphidromus cambojiensis (Reeve, 1860) (junior subjective synonym) Amphidromus lucsegersi Thach & Abbas, 2017: synonym of Amphidromus reflexilabris Schepman, 1892 (junior synonym) Amphidromus michaeli Thach, 2021: synonym of Amphidromus quadrasi quadrasi Hidalgo, 1887 : synonym of Amphidromus quadrasi Hidalgo, 1887 (junior subjective synonym) Amphidromus nguyenkhoai Thach, 2020: synonym of Amphidromus costifer E. A. Smith, 1893 (junior subjective synonym) Amphidromus noriokowasoei Thach & F. Huber, 2017: synonym of Amphidromus smithii Fulton, 1896 (junior subjective synonym) Amphidromus oscitans E. von Martens, 1899: synonym of Amphidromus inconstans Fulton, 1898 (junior subjective synonym) Amphidromus pankowskiae Thach, 2020: synonym of Amphidromus cruentatus (Morelet, 1875) Amphidromus perakensis Fulton, 1901: synonym of Amphidromus atricallosus perakensis Fulton, 1901 (original combination) Amphidromus pervariabilis Bavay & Dautzenberg, 1909: synonym of : synonym of Aegistohadra pervariabilis (Bavay & Dautzenberg, 1909) Amphidromus roemeri (Pfeiffer, 1863): synonym of Aegistohadra roemeri (L. Pfeiffer, 1863) (superseded combination) Amphidromus schileykoi Thach, 2016: synonym of Amphidromus cambojiensis (Reeve, 1860) (junior subjective synonym) Amphidromus stanyi Dharma, 2021: synonym of Amphidromus coeruleus Clench & Archer, 1932 (junior subjective synonym) Amphidromus stevenabbasorum Thach, 2021: synonym of Amphidromus jacobsoni Laidlaw, 1954 (junior subjective synonym) Amphidromus theobaldianus (W. H. Benson, 1857): synonym of Amphidromus moniliferus (A. Gould, 1846) (junior subjective synonym) Amphidromus versicolor Fulton, 1896 : synonym of Amphidromus quadrasi Hidalgo, 1887 (junior subjective synonym) Amphidromus vietnamensis Thach & F. Huber, 2017: synonym of Amphidromus comes (L. Pfeiffer, 1861) (junior subjective synonym)
References
Wang Yung Ching, He Ping, Shen Yang (2019), Review on the synonymy concerning genus Amphidromus Albers, 1850 (Gastropoda: Camaenidae), with descriptions of new species; The Festivus 51 (4), 2019






