Synapomorphic characters of Zethus (Ctenochilus) indicated in Z. pilipalpus A habitus B labial palpi C mesoscutum, dorsal view; arrow indicates welt D metanotum, oblique view; arrow indicates flat surface. Scale bars: 1.0 mm.

  Part of: Lopes RB, Carpenter JM, Noll FB (2021) Cladistic analysis of Zethus Fabricius, 1804 (Hymenoptera, Vespidae): a new subgeneric classification. Journal of Hymenoptera Research 82: 253-283.