Three new genera of nematodes (Strongyloidea: Cloacininae) from the redlegged pademelon,Thylogale stigmatica Gould (Marsupialia: Macropodidae) from eastern Australia

Summary Cassunema exigua n.g., n.sp., Monilonema lacunosa n.g., n.sp. and Foliostoma macropodis n.g., n.sp. are described from the stomach of the redlegged pademelon, Thylogale stigmatica Gould, 1860 (Marsupialia: Macropodidae), from north Queensland, Australia. All three genera belong to the subfamily Cloacininae Stossich, 1899 and to the tribe Macropostrongylinea Lichtenfels, 1980. The genus Cassunema is characterized by a poorly sclerotized buccal capsule with longitudinal ridges formed by the lining of the anterior part of the capsule. The genus Monilonema is characterized by a leaf-crown like flange at the mouth opening, a bulbous cervical collar, and paired dorsal and ventral tubular structures running internally and posteriorly from the collar. The genus Foliostoma is characterized by a leaf crown of tiny elements at the mouth opening, and oesophagus with short narrow anterior part, wide posterior part, bulb narrower than corpus and a heavily sclerotized ring between buccal capsule and oesophagus. A revised definition of the tribe Macropostrongylinea is given together with a key to the genera. ac]19810101