Urogomphus of Spencerhydrus species, instar I 27 S. latecinctus, right urogomphus, dorsal aspect 28 S. latecinctus, left urogomphus, ventral aspect 29 S. pulchellus, right urogomphus, dorsal aspect 30 S. pulchellus, left urogomphus, ventral aspect. Numbers and lowercase letters indicate primary setae and pores, respectively. UR: urogomphus. Scale bar: 0.05 mm.

  Part of: Michat MC, Alarie Y, Watts CHS (2019) Dealing with a hairy beast–larval morphology and chaetotaxy of the Australian endemic diving beetle genus Spencerhydrus (Coleoptera, Dytiscidae, Cybistrini). ZooKeys 884: 53-67. https://doi.org/10.3897/zookeys.884.38391