A. rostrata has a distinctly overhanging, pointed snout tip [diagram shown here from Kluge (1974). One Aprasia species (A. aurita) differs from the others in possessing a small external ear (Kluge 1974). Pa. orientalis is one of several pygopodid species that may be threatened by habitat change, environmental disturbance, and/or habitat fragmentation (remember that many pygopodid species are restricted to relatively small areas and are hence already vulnerable to human-caused changes). There are a few surprising extra-limital records for P. lepidopodus: two from Tasmania and one from New Zealand (Kluge 1974). Pletholax gracilis is apparently closely related to both Ophidiocephalus and the Aprasia species (like Ophidiocephalus, the genus is monotypic).