[Two new species of the genus Nematodirus, parasites of steinboks and chamois: Nematodirus ibicis sp. n. and Nematodirus rupicaprae sp. n].

Two new species of the genus Nematodirus are described. The nematodes were collected from the gastro-intestinal tract of steinboks (Capra ibex) and chamois (Rupicapra rupicapra) of Parco Nazionale del Gran Paradiso (Italian Western Alps). The names Nematodirus ibicis sp. n. and Nematodirus rupicaprae sp. n. are proposed.