Linstowinema, Smales, 1997 (Nematoda : Seuratidae) from dasyurids (Marsupialia : Dasyuridae) from Australia.

Linstowinema edmondsi (Echinonematinae) from Dasyurus hallucatus (Dasyuridae) is redescribed. It can be differentiated from all species of Linstowinema occurring in bandicoots (Peramelidae) in having the first row of cephalic hooks as long as or longer than the second row. L. gracile n. sp. is described from Phascogale tapoatafa and Dasycercus cristicauda, and can be distinguished from all previously described species of Linstowinema in not having a cuticular dilation of the oesophageal region of the body. L. rosamondae n. sp. from Dasykaluta rosamondae, described from females, also lacks the cuticular dilation of the oesophageal region and can be distinguished from L. gracile in having 18-19 rows of body hooks compared with 15. Other Linstowinema spp. for which there is presently insufficient material available for a full description include a single female occurring in Dasyurus viverrinus from Sydney, New South Wales, a single male occurring in Parantechinus bilarni from Kakadu National Park, Northern Territory and three damaged immature males occurring in Sminthopsis leucopus from Timbillica State Forest, New South Wales. Fourth stage larvae of Linstowinema have three rows of cephalic hooks but no body hooks, only spines. Fourth-stage larvae moulting to fifth-stage have body hooks however. This suggests that the genus Linstowinema, with body hooks, may have been derived from the echinomatine genus Inglechina which does not have body hooks.