Geomitridae

Geomitridae is a taxonomic family of small to medium-sized air-breathing land snails, terrestrial pulmonate gastropod mollusks in the superfamily Helicoidea.

Anatomy
The family is characterized by the presence of a free right ommatophoral retractor (passing outside the peni-oviducal angle) and a double stimulatory apparatus. A free right ommatophoral retractor has been linked to adaptation to xeric habitats

Taxonomy
The family Geomitridae is subdivided in the following subfamilies (according to Razkin et al., 2015 )
 * Subfamily Geomitrinae
 * tribe Cochlicellini Schileyko, 1972
 * tribe Geomitrini C. Boettger, 1909 - synonym: Ochthephilinae Zilch, 1960 (n.a.)
 * tribe Ponentinini Razkin et al., 2015
 * Subfamily Helicellinae
 * tribe Cernuellini Schileyko, 1991
 * tribe Helicellini Ihering, 1909 - synonym: Jacostidae Pilsbry, 1948 (inv.)
 * tribe Helicopsini H. Nordsieck, 1987
 * tribe Plentuisini Razkin et al., 2015
 * tribe Trochoideini H. Nordsieck, 1987

Genera
Genera with the family Geomitridae include:

Not belonging to a subfamily:
 * Keraea Gude, 1911
 * Peridotitea Torres Alba, Holyoak, D. T., Holyoak, G. A., Vázquez Toro & Ripoll, 2018
 * Subfamily Geomitrinae
 * tribe Cochlicellini
 * Cochlicella Férussac, 1821
 * Monilearia Mousson, 1872
 * Obelus W. Hartmann, 1842
 * Ripkeniella Hutterer & E. Gittenberger, 1998
 * tribe Geomitrini
 * Actinella R. T. Lowe, 1852
 * Callina R. T. Lowe, 1855
 * Caseolus R. T. Lowe, 1852
 * Discula R. T. Lowe, 1852
 * Disculella Pilsbry, 1895
 * Domunculifex Brozzo, De Mattia, Harl & Neiber, 2020
 * Geomitra Swainson, 1840
 * Helicomela R. T. Lowe, 1855
 * Heterostoma W. Hartmann, 1843 : synonym of Steenbergia Mandahl-Barth, 1950 (invalid: junior homonym of Heterostoma de Filippi, 1837 [Platyhelminthes])
 * Hystricella R. T. Lowe, 1855
 * Lemniscia R. T. Lowe, 1855
 * Moreletina de Frias Martins, 2002
 * Plebecula R. T. Lowe, 1852
 * Pseudocampylaea L. Pfeiffer, 1877
 * Serratorotula Groh & Hemmen, 1986
 * Spirorbula R. T. Lowe, 1852
 * Steenbergia Mandahl-Barth, 1950
 * Testudodiscula Brozzo, De Mattia, Harl & Neiber, 2020
 * Wollastonaria De Mattia, Neiber & Groh, 2018
 * tribe Ponentinini
 * Ponentina P. Hesse, 1921

subfamily Helicellinae


 * tribe Cernuellini
 * Alteniella Clerx & Gittenberger, 1977
 * Cernuella Schlüter, 1838
 * Microxeromagna Ortiz de Zárate López, 1950
 * Xeroplana Monterosato, 1892
 * Xerosecta Monterosato, 1892
 * tribe Helicellini
 * Backeljaia Chueca et al., 2018
 * Candidula Kobelt, 1871
 * Helicella Férussac, 1821
 * Orexana Chueca et al., 2018
 * Xerogyra Monterosato, 1892
 * Xeroleuca Kobelt, 1877
 * Xeroplexa Monterosato, 1892
 * Xerotricha Monterosato, 1892
 * Zarateana Chueca et al., 2018
 * tribe Helicopsini H. Nordsieck, 1987
 * Helicopsis Fitzinger, 1833
 * Pseudoxerophila Westerlund, 1879
 * Xerolenta Monterosato, 1892
 * Xeromunda Monterosato, 1892
 * Xeropicta Monterosato, 1892
 * tribe Plentuisini
 * Plentuisa Puente & Prieto, 1992
 * tribe Trochoideini
 * Trochoidea T. Brown, 1827
 * Xerocrassa Monterosato, 1892