[Gongylonema pithyusensis n. sp. (Nematoda: Spiruridae), a parasite of the oesophagus of the dormouse Eliomys quercinus ophiusae Thomas, 1925 (Rodentia: Gliridae) in Formentera (Balearic Islands) (author's transl)].

A new Nematode, Gongylonema pithyusensis n. sp., parasitizing the oesophagus mucosa of the dormouse Eliomys quercinus ophiusae Thomas, 1925 in the balearic island of Formentera (Spain) is described. The male of the new species is characterized by the size of spicules and gubernaculum; the female by the morphology of the tail, the posteriour situation of the vulva and the dimensions of the eggs. It is the only Gongylonema species to be known parasitizing Rodents of the family Gliridae.