The subfamily Geoplaninae was initially defined by Ogren and Kawakatsu (1990)[4] for land planarians which have a broad creeping sole, mouth in the second half of the body, dorsal testes, subepithelial longitudinal musculature well developed and parenchymal longitudinal musculature absent or not well developed. The eyes contour the anterior region in a single row and posteriorly form several rows, which may spread onto the dorsum, and extend to the posterior end of the body. However, most, if not all, of these characteristics are not exclusive and cannot be considered a synapomorphy of the group. Some characteristics have also been reverted in some genera.[5] Nevertheless, phylogenetic studies have revealed that Geoplaninae is indeed a monophyletic group.[2][6][7]
Genera
Currently the land planarians in the subfamily Geoplaninae are grouped into 9 tribes and 37 genera:[1]
^ abCarbayo, F.; Álvarez-Presas, M.; Olivares, C. U. T.; Marques, F. P. L.; Froehlich, E. X. M.; Riutort, M. (2013). "Molecular phylogeny of Geoplaninae (Platyhelminthes) challenges current classification: Proposal of taxonomic actions". Zoologica Scripta. 42 (5): 508. doi:10.1111/zsc.12019.
^ abSluys, R.; Kawakatsu, M.; Riutort, M.; Baguñà, J. (2009). "A new higher classification of planarian flatworms (Platyhelminthes, Tricladida)". Journal of Natural History. 43 (29–30): 1763–1777. doi:10.1080/00222930902741669.
^Ogren, R. E. and Kawakatsu, M. (1990). Index to the species of the family Geoplanidae (Turbellaria, Tricladida, Terricola) Part I: Geoplaninae. Bulletin of Fujis Women's College. 29: 79-166.
^ abcdefAlmeida, Ana Laura; Álvarez-Presas, Marta; Carbayo, Fernando (7 November 2022). "The discovery of new Chilean taxa revolutionizes the systematics of Geoplaninae Neotropical land planarians (Platyhelminthes: Tricladida)". Zoological Journal of the Linnean Society. 197 (4): 837–898. doi:10.1093/zoolinnean/zlac072. eISSN1096-3642. ISSN0024-4082.
^Álvarez-Presas, M.; Baguñà, J.; Riutort, M. (2008). "Molecular phylogeny of land and freshwater planarians (Tricladida, Platyhelminthes): From freshwater to land and back". Molecular Phylogenetics and Evolution. 47 (2): 555–568. doi:10.1016/j.ympev.2008.01.032. PMID18359250.
^Negrete, Lisandro; Francavilla, Marina Lenguas; Damborenea, Cristina; Brusa, Francisco (2022). "A new genus of land planarian (Platyhelminthes, Geoplanidae) for a new 'blind' species". Systematics and Biodiversity. 20: 1–16. doi:10.1080/14772000.2022.2046200.
^Negrete, Lisandro; Amaral, Silvana Vargas do; Ribeiro, Giovana Gamino; Wolmann Gonçalves, Juliana; Valiati, Victor Hugo; Damborenea, Cristina; Brusa, Francisco; Leal-Zanchet, Ana Maria (2019). "Far away, so close! Integrative taxonomy reveals a new genus and species of land flatworm (Platyhelminthes: Geoplanidae) from southern South America". Zoological Journal of the Linnean Society. 189 (3): 722–744. doi:10.1093/zoolinnean/zlz131. ISSN0024-4082.
^ abNegrete, Lisandro; Álvarez‐Presas, Marta; Riutort, Marta; Brusa, Francisco (2020). "Integrative taxonomy of land planarians (Platyhelminthes: Geoplanidae) from the Andean‐Patagonian Forests from Argentina and Chile, with the erection of two new genera". Journal of Zoological Systematics and Evolutionary Research. 59 (3): 588–612. doi:10.1111/jzs.12444. hdl:2445/194139. ISSN0947-5745.
^Grau, José Horacio; Almeida, Ana Laura; Sluys, Ronald; Carbayo, Fernando (18 April 2022). "A new genus and two new species of land planarians (Platyhelminthes: Tricladida: Geoplanidae) from Southern Chile". Journal of Natural History. 56 (13–16): 947–967. doi:10.1080/00222933.2022.2097137. eISSN1464-5262. ISSN0022-2933.
^Bulnes, Verónica N.; Grau, José H.; Carbayo, Fernando (2018). "A new Chilean genus and species of land planarian (Platyhelminthes: Tricladida, Geoplaninae) with cephalic retractor muscle and adenodactyl". Journal of Natural History. 52 (39–40): 2553–2566. doi:10.1080/00222933.2018.1538468. hdl:11336/88022. ISSN0022-2933.