Rhynchodeminae

Rhynchodeminae
	Rhynchodemus sylvaticus
Scientific classification
Kingdom:	Animalia
Phylum:	Platyhelminthes
Class:	Rhabditophora
Order:	Tricladida
Family:	Geoplanidae
Subfamily:	Rhynchodeminae[1]
Tribes
	Anzoplanini; Caenoplanini; Eudoxiatopoplanini; Pelmatoplanini; Rhynchodemini;

Rhynchodeminae is a subfamily of land planarians with a worldwide distribution.

Phylogeny and Systematics

Based on morphological evidence, especially the presence of a single pair of eyes, the subfamily Rhynchodeminae initially encompassed only the species in the current tribe Rhynchodemini and was considered the sister group of subfamily Microplaninae.[2] The remaining tribes were considered closely related to the subfamily Geoplaninae due to the presence of multiple eyes along the body.

However, molecular studies revealed that this classification was artificial and that the Rhynchodeminae were closely related to Caenoplaninae.[3] Therefore, recent classification puts the former Rhynchodeminae as a tribe, Rynchodemini, inside an expanded subfamily Rhynchodeminae that also contains the tribes Anzoplanini, Caenoplanini, Eudoxiatoplanini and Pelmatoplanini. This group is supported by molecular phylogeny, but there are no known synapomorphies.[3]

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References

Sluys, 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. (1988). Index to the species of the family Rhynchodemidae (Turbellaria, Tricladida, Terricola) Part I: Rhynchodeminae. Bulletin of Fujis Women's College. 26: 39-91.
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. PMID 18359250.

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[Sluys09-1] Sluys, 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.

[Ogren88-2] Ogren, R. E. and Kawakatsu, M. (1988). Index to the species of the family Rhynchodemidae (Turbellaria, Tricladida, Terricola) Part I: Rhynchodeminae. Bulletin of Fujis Women's College. 26: 39-91.

[Alvarez08-3] 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. PMID 18359250.