New species of parasitic nematodes from Dorcopsulus vanheurni (Marsupialia: Macropodidae) from Papua New Guinea

Seven new species of Cloacina are described from the stomach of the lesser forest wallaby, Dorcopsulus vanheurni, from a single locality, Doido, in Pa pua New Guinea. Cloacina syphax sp. nov. differs from all congeners by the undulating anterior margin of irs buccal capsule, lack of lips and acutely pointed tips to the submedian cephalic papillae. Cloacina sancus sp. nov. i s distinguished by the shape of its buccal capsule which is sinuous in apic al view, quadrangular in shape and has right medially directed lobes. Cloac ina solon sp. nov. is differentiated by its cervical cuticular inflation, s ubmedian cephalic papillae with obtuse distal segments, a sinuous anterior margin to the buccal capsule and an unornamented oesophagus. Cloacina sapph o sp. nov. can be separated from congeners by the long, acute submedian cep halic papillae and the presence of the amphids on elevations of the cuticle while C. sciron sp. nov. is distinguished by its cervical inflation, singl e oesophageal denticle, deirid at the level of the nerve ring and eight lea f crown elements. Cloacina sterope sp. nov, can be differentiated from cong eners by the asymmetry of the buccal capsule in lateral view, the presence of oesophageal bosses and a denticle, the deirid posterior to the nerve rin g and a straight vagina. Cloacina solymus sp. nov, is distinguishable by th e tiny submedian cephalic papillae, sinuous anterior margin of the buccal c apsule and sub-cylindrical oesophagus. Additional undescribed species were found but insufficient material was available to permit description.