Labium of Spencerhydrus species, instar I 15 S. latecinctus, dorsal aspect 16 S. latecinctus, ventral aspect 17 S. pulchellus, dorsal aspect 18 S. pulchellus, ventral aspect. Numbers and lowercase letters indicate primary setae and pores, respectively. Additional setae and pores not labelled. Abbreviations: LA: labium; LP1–2: labial palpomeres 1–2. Scale bar: 0.15 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.