A NEW SPECIES OF DORCOPSINEMA MAWSON, 1977 (NEMATODA, CLOACINIDAE) FROM THE TREE KANGAROO DENDROLAGUS-MBAISO (MARSUPIALIA, MACROPODIDAE) FROM IRIAN-JAYA, INDONESIA AND NEW HOST RECORDS FOR DORCOPSINEMA-DENDROLAGI

A new species, Dorcopsinema mbaiso, from Dendrolagus mbaiso from Irian Jaya, Indonesia is described. It is most similar to D. dendrolagi, th e other species of Dorcopsinema occurring in tree-kangaroos, but can b e distinguished from it in having a distinct fleshy collar surrounding the buccal capsule, deirids close to the collar, shorter spicules (1, 055 mu m versus 1,420 in D. dendrolagi), the dorsal lobe of the bursa longer than the lateral lobe rather than the same length as in D. dend rolagi, and the dorsal ray with vestigial lateral branches versus long er lateral branches in D. dendrolagi. It can be distinguished from D. dorcopsinema occurring in Dorcopsis muelleri in having six, not eight perioral cuticular elements, deirids close to the collar (115 mu m ver sus 790 in D. dorcopsis), the dorsal ray with very short lateral branc hes rather than one third the length of the dorsal ray as in D. dorcop sis, and shorter spicules (1,055 mu m versus 2,150 in D. dorcopsis). N ew host records for D. dendrolagi are Dendrolagus scottae and D. inust us, new localities are Tembagapura in Irian Jaya, Indonesia and the We st Sepik region of Papua New Guinea. A key to the species of Dorcopsin ema is given.