Abstract
ABSTRACTA new species of the Subuluridae (Nematoda: Ascaridida) Labiobulura lengguruensis n. sp. is described from the caecum and colon and two new species of the Chabertiidae: Cloacininae (Nematoda: Strongylida) Paralabiostrongylus tuberis n. sp. and Dorcopsinema amplum n. sp. are described from the stomachof the macropodid marsupial Dorcopsis muelleri (Lesson, 1827) (Mammalia: Macropodidae) in Papua Indonesia. Labiobulura lengguruensis differs from all congeners in having a simple denticle associated with each labial lobe of the buccal capsule. Paralabiostrongylus tuberis can be distinguished from its congeners in by the position of the deirid and the form of the dorsal ray and genital cone. Dorcopsinema amplum can be distinguished from its congeners by the length of the spicule, the morphology of the appendages on the ventral lip of the genital cone, the position of the lateral branches of the dorsal ray, the shape of the female tail, the morphology of the vagina and the size of the eggs.The known nematode fauna of D. muelleri is summarised. The finding of three species of Dorcopsinema each in a different geographical locality suggests the possibility of allopatric speciation. A revised key to the species of Dorcopsinema is given.
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