Brinkmanniella augusti Marcus, 1951 (original description)
Choeradoplana bilix Marcus, 1951 (original description)
Daelja Marcus, 1951 (original description)
Daelja secuta Marcus, 1951 (original description)
Geoplana (Geoplana) divae Marcus, 1951 accepted as Obama divae (Marcus, 1951) Carbayo et al., 2013 (original description)
Geoplana (Geoplana) evelinae Marcus, 1951 accepted as Obama evelinae (Marcus, 1951) Carbayo et al., 2013 (original description)
Geoplana (Geoplana) phocaica Marcus, 1951 accepted as Paraba phocaica (Marcus, 1951) Carbayo et al., 2013 (original description)
Geoplana astraea Marcus, 1951 accepted as Pasipha astraea (Marcus, 1951) Ogren & Kawakatsu, 1990 (original description)
Geoplana duca Marcus, 1951 (original description)
Geoplana goetschi Riester, 1938 (additional source)
Geoplana hina Marcus, 1951 accepted as Cratera hina (Marcus, 1951) (original description)
Geoplana leucophryna Marcus, 1951 (original description)
Geoplana pasipha Marcus, 1951 accepted as Pasipha pasipha (Marcus, 1951) Ogren & Kawakatsu, 1990 (original description)
Geoplana pavani Marcus, 1951 (original description)
Geoplana quagga Marcus, 1951 (original description)
Geoplana tapetilla Marcus, 1951 accepted as Pasipha tapetilla (Marcus, 1951) Ogren & Kawakatsu, 1990 (original description)
Geoplana taxiarcha Marcus, 1951 accepted as Cratera taxiarcha (Marcus, 1951) (original description)
Geoplana trina Marcus, 1951 accepted as Xerapoa trina (Marcus, 1951) Carbayo et al., 2013 (original description)
Harsa Marcus, 1951 (original description)
Harsa obnixa Marcus, 1951 (original description)
Imbira marcusi Carbayo et al., 2013 (original description (unavailable nomenclaturally))
Kalyla Marcus, 1951 (original description)
Kalyla gabriellae Marcus, 1951 (original description)
Lenopharynx triops Marcus, 1951 (original description)
Mecynostomum pellitum Marcus, 1951 accepted as Haplogonaria pellita (Marcus, 1951) (original description)
Microstomum breviceps Marcus, 1951 (original description)
Microstomum mortenseni Riedel, 1932 (status source)
Microstomum rhabdotum Marcus, 1951 (original description)
Minona divae Marcus, 1951 (original description)
Minona mica Marcus, 1951 accepted as Duplominona mica (Marcus, 1951) (original description)
Pistrix Marcus, 1951 accepted as Mesoda Marcus, 1949 (original description)
Pistrix thelura Marcus, 1951 accepted as Mesoda thelura (Marcus, 1951) (original description)
Rhinolasius Marcus, 1951 (original description)
Rhinolasius sartus Marcus, 1951 (original description)
Tangaroa oculatus (Pereyaslawzewa, 1892) Marcus, 1951 accepted as Sopharynx oculatus (Pereyaslawzewa, 1892) Beklemischev, 1929 (new combination reference)
Thallagus Marcus, 1951 (original description)
Thallagus divae Marcus, 1951 (original description)
Vejdovskya suslica Marcus, 1951 accepted as Pogaina suslica (Marcus, 1951) Marcus, 1954 (original description)

Argentina for Geoplana (Geoplana) carrierei Graff, 1897 
Bolivia for Geoplana (Geoplana) carrierei Graff, 1897 
Brazil for Brinkmanniella augusti Marcus, 1951 
Brazil for Choeradoplana bilix Marcus, 1951 
Brazil for Choeradoplana iheringi Graff, 1899 
Brazil for Choeradoplana iheringi Graff, 1899 
Brazil for Cylindrostoma myfflum Marcus, 1951 
Brazil for Daelja secuta Marcus, 1951 
Brazil for Geobia subterranea Schultze & Müller, 1857 
Brazil for Geobia subterranea Schultze & Müller, 1857 
Brazil for Geobia subterranea Schultze & Müller, 1857 
Brazil for Geobia subterranea Schultze & Müller, 1857 
Brazil for Geobia subterranea Schultze & Müller, 1857 
Brazil for Geobia subterranea Schultze & Müller, 1857 
Brazil for Geoplana (Geoplana) braunsi Graff, 1899 
Brazil for Geoplana (Geoplana) braunsi Graff, 1899 
Brazil for Geoplana (Geoplana) braunsi Graff, 1899 
Brazil for Geoplana (Geoplana) carinata Riester, 1938 
Brazil for Geoplana (Geoplana) carinata Riester, 1938 
Brazil for Geoplana (Geoplana) carinata Riester, 1938 
Brazil for Geoplana (Geoplana) carinata Riester, 1938 
Brazil for Geoplana (Geoplana) carrierei Graff, 1897 
Brazil for Geoplana (Geoplana) carrierei Graff, 1897 
Brazil for Geoplana (Geoplana) divae Marcus, 1951 
Brazil for Geoplana (Geoplana) divae Marcus, 1951 
Brazil for Geoplana (Geoplana) duca Marcus, 1951 
Brazil for Geoplana (Geoplana) duca Marcus, 1951 
Brazil for Geoplana (Geoplana) duca Marcus, 1951 
Brazil for Geoplana (Geoplana) evelinae Marcus, 1951 
Brazil for Geoplana (Geoplana) evelinae Marcus, 1951 
Brazil for Geoplana (Geoplana) evelinae Marcus, 1951 
Brazil for Geoplana (Geoplana) ferussaci Graff, 1899 
Brazil for Geoplana (Geoplana) hina Marcus, 1951 
Brazil for Geoplana (Geoplana) leucophryna Marcus, 1951 
Brazil for Geoplana (Geoplana) leucophryna Marcus, 1951 
Brazil for Geoplana (Geoplana) marginata Müller, 1856 
Brazil for Geoplana (Geoplana) marginata Müller, 1856 
Brazil for Geoplana (Geoplana) marginata Müller, 1856 
Brazil for Geoplana (Geoplana) marginata Müller, 1856 
Brazil for Geoplana (Geoplana) marginata Müller, 1856 
Brazil for Geoplana (Geoplana) marginata Müller, 1856 
Brazil for Geoplana (Geoplana) marginata Müller, 1856 
Brazil for Geoplana (Geoplana) marginata Müller, 1856 
Brazil for Geoplana (Geoplana) metzi Graff, 1899 
Brazil for Geoplana (Geoplana) multicolor Graff, 1899 
Brazil for Geoplana (Geoplana) multicolor Graff, 1899 
Brazil for Geoplana (Geoplana) multicolor Graff, 1899 
Brazil for Geoplana (Geoplana) multicolor Graff, 1899 
Brazil for Geoplana (Geoplana) multicolor Graff, 1899 
Brazil for Geoplana (Geoplana) multicolor Graff, 1899 
Brazil for Geoplana (Geoplana) multicolor Graff, 1899 
Brazil for Geoplana (Geoplana) multicolor Graff, 1899 
Brazil for Geoplana (Geoplana) pavani Marcus, 1951 
Brazil for Geoplana (Geoplana) phocaica Marcus, 1951 
Brazil for Geoplana (Geoplana) phocaica Marcus, 1951 
Brazil for Geoplana (Geoplana) preta Riester, 1938 
Brazil for Geoplana (Geoplana) quagga Marcus, 1951 
Brazil for Geoplana (Geoplana) quagga Marcus, 1951 
Brazil for Geoplana (Geoplana) quagga Marcus, 1951 
Brazil for Geoplana (Geoplana) taxiarcha Marcus, 1951 
Brazil for Geoplana (Geoplana) taxiarcha Marcus, 1951 
Brazil for Geoplana (Geoplana) taxiarcha Marcus, 1951 
Brazil for Geoplana (Geoplana) vaginuloides (Darwin, 1844) Schultze, 1856 
Brazil for Geoplana astraea Marcus, 1951 
Brazil for Geoplana astraea Marcus, 1951 
Brazil for Geoplana bergi Graff, 1899 
Brazil for Geoplana bergi Graff, 1899 
Brazil for Geoplana bergi Graff, 1899 
Brazil for Geoplana bergi Graff, 1899 
Brazil for Geoplana bergi Graff, 1899 
Brazil for Geoplana pasipha Marcus, 1951 
Brazil for Geoplana pasipha Marcus, 1951 
Brazil for Geoplana pasipha Marcus, 1951 
Brazil for Geoplana pasipha Marcus, 1951 
Brazil for Geoplana pasipha Marcus, 1951 
Brazil for Geoplana pseudorhynchodemus Riester, 1938 
Brazil for Geoplana pseudorhynchodemus Riester, 1938 
Brazil for Geoplana rezendei Schirch, 1929 
Brazil for Geoplana tapetilla Marcus, 1951 
Brazil for Geoplana trina Marcus, 1951 
Brazil for Harsa obnixa Marcus, 1951 
Brazil for Kalyla gabriellae Marcus, 1951 
Brazil for Kalyla gabriellae Marcus, 1951 
Brazil for Lenopharynx triops Marcus, 1951 
Brazil for Mecynostomum pellitum Marcus, 1951 
Brazil for Microstomum breviceps Marcus, 1951 
Brazil for Microstomum rhabdotum Marcus, 1951 
Brazil for Minona divae Marcus, 1951 
Brazil for Minona mica Marcus, 1951 
Brazil for Pistrix thelura Marcus, 1951 
Brazil for Plagiostomum clusum Marcus, 1951 
Brazil for Plagiostomum kurrum Marcus, 1951 
Brazil for Plagiostomum sagax Marcus, 1951 
Brazil for Plagiostomum thelotrichum Marcus, 1951 
Brazil for Plagiostomum thelotrichum Marcus, 1951 
Brazil for Rhinolasius sartus Marcus, 1951 
Brazil for Thallagus divae Marcus, 1951 
Brazil for Tuilica evelinae Marcus, 1951 
Brazil for Urastoma evelinae Marcus, 1951 
Brazil for Vejdovskya suslica Marcus, 1951