Two New Species of Labiostrongylinea (Nematoda: Cloacininae) from Salawati Island, Indonesia

Abstract

Two new species of Labiostrongylinea (Nematoda: Cloacininae), Labiosimplex papuensis n.sp and Labiomultiplex sagawinensis n.sp, are described from the stomach of the macropodid marsupial, Dorcopsis muelleri (Lesson, 1827) (Mammalia :Macropodidae) in Papua, Indonesia. Labiosimplex papuensis n. sp. is most similar to Ls. redmondi Smales, 1982 in having the lateral lips of similar shape to the submedians and can be distinguished from it by the form of the cephalic papillae and the much shorter spicules. Labiomultiplex sagawinensis n. sp. falls between two groups of species, in regard to spicule length, including Lm. novaeguineae Smales, 1994 also found only in New Guinea. It can be distinguished from all congeners by a suite of characters including the shape of the lateral lips, spicule length, the form of the genital cone, gubernaculum, branches of the dorsal ray and egg size. The finding of these two new species may be indicative of scenarios of coevolution with the host, D. muelleri (Ls. papuensis) and host switching from Dendrolagus sp., (Lm. sagawinensis) after isolation from Australia.