Trichosomoides nasalis Biocca & Aurizi, 1961 and T-Spratti n. sp (Nematoda: Trichinelloidea), from the nasal cavity of murids

The nematode parasite of the nasal mucosa of rodents, Trichosomoides nosali s, is common in the murid Arvicanthis niloticus, in Senegal. The morphologi cal study of this material allowed vs to augment the original description, mode with specimens recovered in Italy from Rattus norvegicus. This analysi s shows,hat specimens from Rattus fuscipes in Australia, which had been ide ntified to this species, represent a distinct species (smaller, with an ave rage of five intrauterine males per female instead of one), which we name T . spratti n. sp.