Thaumatodryinus Perkins, 1905

Martins, Andre L. & Melo, Gabriel A. R., 2020, Revision of the fossil species of Thaumatodryinus Perkins from Dominican amber, with a new combination and description of a new species (Hymenoptera, Dryinidae), Journal of Hymenoptera Research 79, pp. 77-88 : 77

Genus Thaumatodryinus Perkins, 1905

Type species.

Thaumatodryinus koebelei Perkins, 1905, by monotypy.

Diagnosis.

Among living and fossil dryinids, the species of Thaumatodryinus can be recognized by the following combination of characters: mandible with four teeth in both sexes, teeth progressively larger from anterior to posterior ends along cutting edge; outer surface of mandible with a distinct basal sulcus, extending from the anterior to the posterior condyle; mid portion of anterior margin of clypeus straight or convex; occipital carina complete in fossil taxa and in males of most living species, females of many living taxa with incomplete carina; maxillary and labial palpomeres in proportion 6:3; antenna filiform in both sexes; flagellomeres 3-7 of female with single set of rhinaria on its mid length, flagellomere 8 with two sets of rhinaria along its length; rhinaria on flagellomeres 5-8 each with four long setae, two at each side; pronotum saddle-shaped and crossed by strong transverse impression at central portion, pronotal lobe reaching tegula; anterior margin of mesoscutellum with a foveate groove; fore wing with 2r-rs shorter than 3Rs&4Rs; female with tarsal claw simple and with basal expansion, male with bifid claw, without basal expansion; apex of 3rd tarsomere of fore leg with variable number of thick bristles in female; chela with rudimentary claw, enlarged claw with one row of lamellae and two subapical teeth laterally on outer surface; female hind coxa with a distinct basal projection ventrally; dorsal and posterior surfaces of propodeum convex; tibial spur formula for both sexes 1/1/2.