New Oswaldocruzia (Nematoda, Trichostrongylina, Molineoidea) parasites of Amphibians from French Guyana and Ecuador

Abstract

The Oswaldocruzia, parasitizing French Guyana and Ecuador, amphibians are morphologically closely related. The species can be mainly distinguished by the relative disposition of bursal rays 6, 8 and 9, the pattern of the synlophe in the anterior part of the body and by the shape of the spicular tips. Oswaldocruzia sp., parasite of Leptodactylus pentadactylus from Guyana, known by a sole female possesses strong cervical alae with a chitinous support. Oswaldocruzia lescurei n. sp., parasite of Bufo typhonius from Guyana, differs from Oswaldocruzia bonsi in that rays 2 and 3 are joined together as are rays 5 and 6 and in that there are no extra branches at the bifurcation level of the fork. Oswaldocruzia albareti n. sp., parasite of Leptodactylus pentadactylus and Bufo spp. from Guyana and Hyla spp. from Ecuador, differs from O. chambrieri Ben Slimane & Durette-Desset, 1993, by the position of the excretory pore, the absence of a common trunk between the latero-ventral rays and rays 8 and by the absence of extra branches on the spicular shoe. Oswaldocruzia chabaudi n. sp., parasitizing some species of Hyla from Ecuador, differs from the closely related species O. albareti by the position of the excretory pore, by the length of rays 4 and 8 and by the division of the spicular blade.