Skrjabinodon heliocostai sp.n. (Nematoda, Pharyngodonidae) parasitizing Mabuya frenata (Cope) (Lacertilia, Scincidae) in Brazil and the reallocation of Skrjabinodon capacyupanquii (Freitas, Vicente & Ibanez) in the genus Thelandros Wedl

Abstract

The present report is related to an oxyurid nematode recovered from a reptilian host, Mabllya jrenata (Cope, 1862) and the proposal of Slajabinodoll heli-costai sp.n., based mainly on findings referring to the lateral alae, position of excretory pore and vulvar apet1ures, cuticular spines of the tail and aspect of the eggs. The examination of types of Skljabillodoll capacyupanquii (Freitas, Vicente & Ibanez, 1968) from a Peruvian lizard, indicated the reallocation of this species in the genus The/alldros Wed!., 1862, as T. capacYllpcmqllii comb.n., based on the diameter of the caudal appendage of males and position of the vulvar aperture. The new species described herein represents the first rep0\1 of a species of the genus Slajabillodoll Inglis, 1968 in South America. KEY WORDS. Nematodes, Skljabillodoll, new species, The/andros, new combination , lizard, South America Nematodes occurring in Brazilian reptiles were fully reported from 1861 to 1988 (VICENTE et af. 1993b) when several nematode species have been referred parasitizing lizards in Brazil. Nevertheless, only a couple of them are related to Scincidae hosts, namely Mabuya maboya mabouya (Lace pede, 1788) and M maculata (Gray, (839). The present findings are related to the proposition ofa new taxon and a new combination regarding nematode species from reptilian hosts in Brazil and Peru, respectively. MATERIALS AND METHODS Two-hundred and thirty-two lizards Mabuyafrenata (Cope) were captured between 1993-1995. Worms were recovered in a 0.85% NaCI solution, fixed in hot 700GL ethanol and were processed for study as described elsewhere (VICENTE et af. 1993a). The preparation of en face mounts, illustrations and photomicrographs