Trigonopsis violaceus Smith, 1851:31 - Cameron, 1888Cameron, P. 1888. Biologia Centrali-Americana. Insecta. Hymenoptera. (Fossores) Vol. II. :1-33. (distribution); Cameron, 1888-1900Cameron, P. 1888-1900. Biologia Centrali-Americana - Insecta. Hymenoptera. (Fossores) Vol. II. R. H. Porter and Dulau & Co., London. 413pp, 14 pl.:26 (listed); Amarante, 2002Amarante, S.T.P. 2002. A synonymic catalog of the neotropical Crabronidae and Sphecidae (Hymenoptera: Apoidea). Arquivos de Zoologia (São Paulo) 37:1-139.:71 ( listed as synonym of Trigonopsis violascens (Dalla Torre, 1897)).
Sceliphron violascens Dalla Torre, 1897:393, no descr. Replacement name for Trigonopsis violaceus Smith, 1851 by Dalla Torre, 1897Dalla Torre, C.G. 1897. Catalogus hymenopterorum hucusque descriptorum systematicus et synonymicus. Volumen VIII: Fossores (Sphegidae). Breitkopf & Härtel, Leipzig. 1-749.:393 (nec Fabricius). - 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 Trigonopsis violascens: - Callan, 1990Callan, E.Mc C. 1990. Sphecidae of Trinidad. I. Ampulicinae, Sphecinae and Pemphredoninae. Sphecos 20:19. (distribution); Amarante, 2002Amarante, S.T.P. 2002. A synonymic catalog of the neotropical Crabronidae and Sphecidae (Hymenoptera: Apoidea). Arquivos de Zoologia (São Paulo) 37:1-139. (distribution); Starr & Hook, 2003Starr, C.K. & Hook, A.W. 2003. The aculeate Hymenoptera of Trinidad, West Indies. Occasional Papers o the Department of Life Sciences, University of the West Indies 12:1-31. (distribution); Cambra, 2005Cambra, R.A. 2005. Nuevos registros de avispas Apoidea y Vespoidea (Insecta: Hymenoptera) para Panamá. Tecnociencia 7 (2):95-108. (distribution); Rasmussen & Asenjo, 2009Rasmussen, C. & A. Asenjo 2009. A checklist to the wasps of Peru (Hymenoptera, Aculeata). ZooKeys 15:1-78. (distribution).
Podium resplendens Kohl, 1902:41 - Amarante, 2002Amarante, S.T.P. 2002. A synonymic catalog of the neotropical Crabronidae and Sphecidae (Hymenoptera: Apoidea). Arquivos de Zoologia (São Paulo) 37:1-139.:71 ( listed as synonym of Trigonopsis violascens (Dalla Torre, 1897)).