Sphex depressa De Geer, 1773:590, pl. 30, fig. 7, sex not indicated.Surinam (leg. M. Rolander). - As Seminota depressa: - Schulz, 1912Schulz, W.A. 1912. Aelteste und alte Hymenopteren skandinavischer Autoren. Berliner Entomologische Zeitschrift 57:52-102.:61 (comb. nov.); Carmean & Kimsey, 2007Carmean, D. & L. Kimsey 2007. Phylogenetic revision of the parasitoid wasp family Trigonalidae (Hymenoptera). 23:35-76. (distribution); Smith et al., 2012Smith, D.R., D.H. Janzen, W. Hallwachs & M.A. Smith 2012. Hyperparasitoid wasps (Hymenoptera, Trigonalidae) reared from dry forest and rain forest caterpillars of Area de Conservación Guanacaste, Costa Rica. Journal of Hymenoptera Research 29:119-144. (distribution). - As Sphex depressus: - Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749. (distribution). - As Trigonalys depressa: - Dalla Torre, 1901-1902Dalla Torre, C.G. 1901-1902. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. — Volumen III: Trigonalidae, Megalyridae, Stephanidae, Ichneumonidae, Agriotypidae, Evaniidae, Pelecinidae. Pars II. Breitkopf & Härtel, Leipzig. VIII + 1141. (distribution).