Detailed diagnostic characteristics of male Acutogordius taiwanensis sp. n. A Tiny bristles scattered anterior to postcloacal crescent B Tiny bristles scattered in concentrated groups on tail lobes C Lobe tips covered by moderately flat areoles with short spines amongst areoles D–E Short bristles scattered on the mid-body cuticle. Scale bars 200 µm (A–B), 100 µm (C–D), and 10 μm (E).