Subfamily Ycaplocinae Lepeco and Melo, subfam. nov. Type genus: Ycaploca Nagy, 1975. Diagnosis. Basal surface of mandible with a strong depression, condyles depressed in relation to apical portion of mandible; medioapical edge of medial lobe of clypeus incurved; F1 shorter than 0.7× F2 length; frons raised, with lateral margins of elevation carinated; posterior surface of propodeum with a weakly defined median longitudinal carina above propodeal foramen; metatibia with one apical spur; marginal, submarginal and medial cells closed by tubular veins; 2r-rs&3Rs (basal part of vein Rs in marginal cell) before insertion of vein 2rs-m longer than 2× vein 1m-cu on forewing; 1Rs + M far shorter than 2Rs + M on forewing; vein Sc + R restricted to base of hindwing.

Published as part of Lepeco, Anderson & Melo, Gabriel A. R., 2024, Revisiting the phylogeny of the scolebythid wasps (Hymenoptera: Aculeata) through Bayesian model evaluation and parsimony, with description of a new fossil family of Chrysidoidea, pp. 57-85 in Zoological Journal of the Linnean Society 201 on page 70, DOI: 10.1093/zoolinnean/zlad113, http://zenodo.org/record/11240975