[Oswaldocruzia bonai n. sp. (Nematoda, Trichostrongylina, Molineoidea),a parasite of a Sardinian cave salamander].

The Oswaldocruzia parasites of amphibians in Europe are closely related. Contrary to this, the new species Oswaldocruzia bonai discovered in the cave salamander from Sardinia shows particular and archaic characters: dorsal ray of the caudal bursa well developed and tips of the rays 4 equidistant from those of the 3 and 5; female with few eggs of large size. The lack of ridges in front of each lateral cord is a character shared with Ethiopian species but which differentiated the Sardinian species from the European species.