Subterranean Aquatic Planarians of Sardinia, with a Discussion on the Penial Flagellum and the Bursal Canal Sphincter in the Genus Dendrocoelum (Platyhelminthes, Tricladida, Dendrocoelidae)

Giacinta Angela Stocchino, Ronald Sluys, Palolo Marcia, and Renata Manconi

ABSTRACT: