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Dugesia sagitta
''Dugesia sagitta'' is a species of dugesiid triclad that inhabits the rivers of Corfu, Greece. The specimens of this species are up to long and wide.〔De Vries, E. J., 1984. On the species of the ''Dugesia gonocephala'' group (Platyhelminthes, Turbellaria, Tricladida) from Greece. Bijdragen tot de Dierkunde 54:101-126〕
In 1925 Komarek synonymized ''Dugesia sagitta'' (then ''Planaria sagitta'') with ''D. gonocephala'',〔Komárek, J., 1925. Die O. Schmidt'schen Süsswassertricladen von Corfu und Cephalonia, gesammelt von Professor Wilhelmi. ''Zool. Anz., 63:322-328.〕 because the morphological description given by Schmidt when the species was named in 1861 was not accurated. In 1984 ''D. sagitta'' was back from the synonymization thanks to the contribution of a more accurated morphological description done by de Vries.〔 In 1861 Schmidt also described ''D. sagitta'' from Cephalonia, but de Vries demonstrated that it was actually ''D. aenigma''.〔
The type locality of this species is Messonghi river, Corfu, Greece.〔
==Karyology==
This ''Dugesia'' species, from what only sexual reproducing specimens are known, have a karyoptype of 2n=16, constituted only by acrocentric chromosomes.〔Ball, I. R., 1979. The karyotypes of two Dugesia species from Corfu, Greece (Platyhelminthes, Turbellaria). Bijdr. Dierk., 48(2):187-190.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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