Integrative taxonomy of a new species of planarian from the Lake Ohrid basin, including an analysis of biogeographical patterns in freshwater triclads from the Ohrid region (Platyhelminthes, Tricladida, Dugesiidae)

A new species of the genus Dugesia is described from the Lake Ohrid region in the western part of the
Balkan Peninsula, forming the first fully documented species description for this genus in the Ohrid
area. The morphological species delimitation is supported by complementary molecular, karyological,
and cytogenetic data available from the literature. Therefore, species delineation is based on a truly
integrative approach. Further, a short account on the degree of freshwater planarian endemicity in the
Ohrid region is provided.