R. Sluys et al., DEVIATION FROM THE GROUNDPLAN - A UNIQUE NEW SPECIES OF FRESH-WATER PLANARIAN FROM SOUTH BRAZIL (PLATYHELMINTHES, TRICLADIDA, PALUDICOLA), Journal of zoology, 241, 1997, pp. 593-601
The species Girardia blapertura Sluys, sp. nov. is described from the
state al Rio Grande do Sul, Brazil. A unique derived character disting
uishes this species from its congeners and all other planarians known
to date, namely separate openings of the vasa deferentia at the tip of
the penial papilla. Present knowledge on the distribution of Girardia
species in Rio Grande do Sul is summarized.