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Geoplanidae comprises approximately 900 species and is divided into four subfamilies: Bipaliinae Stimpson, 1857 (cosmopolitan), Geoplaninae Stimpson, 1857 (neotropical), Microplaninae Pantin, 1853 (cosmopolitan), and Rhynchodeminae Graff, 1896 (cosmopolitan). A substantial part of the taxonomic studies of land planarians from South American dealt with species from the East of the Andes, especially from the southern and southeastern regions of Brazil, and from Argentina. The diversity ofdoi:10.11606/t.38.2021.tde-14092021-084236 fatcat:te6qg7zryfhi7ht6xx6zkw3y6i