A review of <i>Triplotaenia undosa</i> Beveridge, 1976 (Cestoda: Anoplocephalidae) from macropodid marsupials, with the erection of <i>T. macropodis</i> sp. nov.

Molecular evidence (28S DNA) has suggested that <i>Triplotaenia undosa</i> from macropodid marsupials is a species complex. Additional data (cox 1) presented in this study confirmed the hypothesis and a morphological examination of all available specimens identified a new species, <i>T. macropodis</i> sp. nov., in the grey kangaroos <i>Macropus fuliginosus</i> and <i>M. giganteus</i> as well as the tammar wallaby, <i>Notamacropus eugenii</i>, and the red kangaroo, <i>Osphranter rufus.</i> The new species differs in the ratio of the number of testes to the number of female genital complexes. Specimens of <i>T. undosa</i> from the swamp wallaby, <i>Wallabia bicolor</i>, the type host, and the common wallaroo, <i>Osphranter robustus</i>, are each genetically distinct, but the fixed material from <i>O. robustus</i> is too fragmentary to permit a detailed morphological description. An amended description and new illustrations of <i>T. undosa</i> from <i>W. bicolor</i> are provided.