Order: Zygentoma

Two families of these occur in Australia, the Lepismatidae and the Nicoletiidae with 70 species between them. Wingless, flattened body, with or without scales, small compound eyes (can be absent), and with three cerci, the central one longer than the outer pair. The central cercus is rear-facing, while the outer ones face sideways, a characteristic that distinguishes them from the bristletails (above).