Distribution
The genus ''Girardia'' is endemic to the Americas, from Argentina to Canada, although most species occur in South America. The only two species known to occur naturally in North America, ''Girardia tigrina'' and ''Girardia dorotocephala'', have been introduced in other continents and islands.Description
Species of ''Girardia'' are very similar to species of other genera of Dugesiidae and fewSpecies
*'' Girardia anceps'' (Kenk, 1930) *'' Girardia anderlani'' (Kawakatsu & Hauser, 1983) *'' Girardia andina'' (Borelli, 1895) *'' Girardia antillana'' (Kenk, 1941) *'' Girardia arenicola'' Hellmann & Leal-Zanchet, 2018 *'' Girardia arimana'' (Hyman, 1957) *'' Girardia arizonensis'' (Kenk, 1975) *'' Girardia arndti'' Marcus, 1946 *'' Girardia asymmetrica'' Hellmann & Leal-Zanchet, 2020 *'' Girardia aurita'' (Kennel, 1888) *'' Girardia avertiginis'' Sluys, 2005 *'' Girardia azteca'' (Benazzi & Giannini, 1971) *'' Girardia barbarae'' (Mitchell & Kawakatsu, 1973) *'' Girardia biapertura'' Sluys, 1997 *'' Girardia bonaerensis'' (Moretto, 1996) *'' Girardia bursalacertosa'' Sluys, 2005 *'' Girardia cameliae'' (Furhmann, 1912) *'' Girardia canai'' Curino & Cazzaniga, 1993 *'' Girardia capacivasa'' Sluys & Kawakatsu, 2005 *'' Girardia corumbataiensis'' Morais & Leal-Zanchet, 2021 *'' Girardia chilla'' (Marcus, 1954) *'' Girardia cubana'' (Codreanu & Balcesco, 1973) *'' Girardia desiderensis'' Souza & Leal-Zanchet, 2016 *'' Girardia dorotocephala'' (Woodworth, 1897) *'' Girardia dubia'' (Borelli, 1895) *'' Girardia festae'' (Borelli, 1898) *'' Girardia glandulosa'' (Kenk, 1930) *'' Girardia graffi'' (Weiss, 1909) *'' Girardia guatemalensis'' (Mitchell & Kawakatsu, 1973) *'' Girardia hoernesi'' (Weiss, 1910) *'' Girardia hypoglauca'' (Marcus, 1948) *'' Girardia ibitipoca'' Hellmann & Leal-Zanchet, 2020 *'' Girardia informis'' Sluys & Grant, 2006 *'' Girardia jenkinsae'' (Benazzi & Gourbault, 1977) *'' Girardia jugosa'' Sluys, 2005 *'' Girardia longistriata'' (Furhmann, 1912) *'' Girardia mckenziei'' (Mitchell & Kawakatsu, 1973) *'' Girardia microbursalis'' (Hyman, 1931) *'' Girardia multidiverticulata'' Souza, Morais, Cordeiro & Leal-Zanchet, 2015 *'' Girardia nobrensis'' Morais & Leal-Zanchet, 2021 *'' Girardia nonatoi'' (Marcus, 1946) *'' Girardia paramensis'' (Fuhrmann, 1912) *'' Girardia paucipunctata'' Hellmann & Leal-Zanchet, 2018 *'' Girardia pierremartini'' Souza & Leal-Zanchet, 2016 *'' Girardia polyorchis'' (Fuhrmann, 1912) *'' Girardia rincona'' (Marcus, 1954) *'' Girardia sanchezi'' (Hyman, 1955) *'' Girardia schubarti'' (Marcus, 1946) *'' Girardia seclusa'' (de Beauchamp, 1940) *'' Girardia sinensis'' Chen & Wang, 2015 *'' Girardia somuncura'' Lenguas Francavilla, Negrete, Martínez-Aquino, Damborenea & Brusa, 2021 *'' Girardia spelaea'' Hellmann & Leal-Zanchet, 2020 *'' Girardia sphincter'' Sluys & Kawakatsu, 2001 *'' Girardia striata'' (Weiss, 1910) *'' Girardia tahitiensis'' Gourbault, 1977 *''Phylogeny
References
{{Taxonbar, from=Q5564174 Dugesiidae Rhabditophora genera Animals described in 1974