Strongyloides mascomaisp. n. (Strongyloididae) un nouveau Nématode parasite deRana pereziSeoane, 1885 (Amphibia : Ranidae) de l’est de l’Espagne

SUMMARY. Description and differentiation of the parasite stage of Strongyloides mascomai sp. n. (Nematoda: Strongyloididae), an cloacal parasite of Rana perezi Seoane, 1885 in the east of Iberian Peninsula (Spain). The new species is charac-terized for its large length of the oesophagus, the morphology of its stoma and the moderate spiralation of the ovaries of the female parasite.