Dugesia sagitta

Dugesia sagitta
	Preserved specimen of Dugesia sagitta
Scientific classification
Kingdom:	Animalia
Phylum:	Platyhelminthes
Order:	Tricladida
Family:	Dugesiidae
Genus:	Dugesia
Species:	D. sagitta
Binomial name
	Dugesia sagitta; (Schmidt, 1861)
	Corfu, Greece
Synonyms
	Planaria sagitta Schmidt, 1861; Planaria gonocephala; Komarek, 1925; Dugesia gonocephala; Ball, 1979; De Vries & Ball, 1980;

Dugesia sagitta is a species of dugesiid triclad that inhabits the rivers of Corfu, Greece. The specimens of this species are up to 10 millimetres (0.39 in) long and 3 millimetres (0.12 in) wide.[1]

In 1925 Komarek synonymized Dugesia sagitta (then Planaria sagitta) with D. gonocephala,[2] 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.[1] In 1861 Schmidt also described D. sagitta from Cephalonia, but de Vries demonstrated that it was actually D. aenigma.[1]

The type locality of this species is Messonghi river, Corfu, Greece.[1]

Karyology

This Dugesia species, from what only sexual reproducing specimens are known, have a karyoptype of 2n=16, constituted only by acrocentric chromosomes.[3]

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References

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
Komárek, J., 1925. Die O. Schmidt'schen Süsswassertricladen von Corfu und Cephalonia, gesammelt von Professor Wilhelmi. Zool. Anz., 63:322-328.
Ball, I. R., 1979. The karyotypes of two Dugesia species from Corfu, Greece (Platyhelminthes, Turbellaria). Bijdr. Dierk., 48(2):187-190.

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[Vries84-1] 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

[2] Komárek, J., 1925. Die O. Schmidt'schen Süsswassertricladen von Corfu und Cephalonia, gesammelt von Professor Wilhelmi. Zool. Anz., 63:322-328.

[Ball1979-3] Ball, I. R., 1979. The karyotypes of two Dugesia species from Corfu, Greece (Platyhelminthes, Turbellaria). Bijdr. Dierk., 48(2):187-190.