Ulyxes sisyphus (Domrow, 1981) new combination

(Figs 55, 59)

Haemolaelaps sisyphus Domrow, 1981: 222 .

Androlaelaps sisyphus . — Halliday, 1998: 123.

Remarks. The description of this species appears in a journal issue intended for 1979 and stated therein to be published 1980 but the actual publication date is 1981 (Domrow, 1988; Halliday, 1998).

Ulyxes sisyphus is recorded from the intranasal passages of southeastern New South Wales populations of Trichosurus vulpecula, the Common Brushtail Possum. In one specimen peritematal and exopodal IV plates are narrowly fused (QMS 58771). Even though it has moderately strong chelicerae (Table 3), these are dissimilar to those of predatory forms, and it is assumed to be a parasite based on its highly specialised habitat and derived morphology .