Dugesia aenigma
Morphology:
Ejaculatory duct centrally located in penial papilla with a terminal opening; Large diaphragm; Presence of penial folds; Entrance of oviducts into bursal canal symmetrical; Openings vasa deferentia into seminal vesicle not close to diaphragm.
Size:
Preserved specimens up to 8 mm in length and 2 mm in width.
Distribution:
Type locality: Stream north of Charaktion, Cephalonia, Greece.