Abstract
Potorostrongylus finlaysoni, occurring in Potorous tridactylus and Bettongia gaimardi, and P. aepyprymnus, occurring in Aepyprymnus rufescens, are redescribed. Two new species, P. tropicus, occurring in B. tropicus, and P. temperatus, occurring in B. gaimardi, are described. P. tropicus can be distinguished from P. aepyprymmus, the other species found in Queensland, by the wider terminal bulb of the oesophagus, in having the dorsal lobe of the bursa longer than the lateral lobes rather than about the same length, slightly curved rather than markedly curved spicule tips, a larger number of appendages on the posterior lip of the genital cone, and a longer female tail and longer vagina compared with P. aepyprymnus. P. temperatus can be distinguished from P. finlaysoni, the other species occurring in Tasmania in having the dorsal lobe about the same length as the lateral lobes, rather than longer, the dorsal ray with longer rather than shorter lateral branches, the posterior lip of the genital cone with four pairs of setiform appendages rather than the three pairs of bifid appendages, the vulva closer to the anus and the vagina shorter compared with P. finlaysoni. A key to species of the genus is given.
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