Odynerus bellulus Cresson, 1872:243, ♀. 2 ♀♀, Texas (leg. Belfrage). - Dalla Torre, 1894Dalla Torre, C.G. 1894. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus, IX. Vespidae (Diploptera). Guilelmi Engelmann, 181. (distribution). - As Leptochilus bellulus: - Krombein, 1958Krombein, K.V. 1958. Superfamily Vespoidea. In: Krombein, K.V. (Ed.). Hymenoptera of America North of Mexico - Synoptic Catalog. Washington: U.S. Department of Agriculture. Agriculture Monograph No. 2. First Supplement, 305 pp. 162-169. (distribution); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209. (distribution); Ruíz-Cancino & Coronado-Blanco, 2002Ruíz-Cancino, E. & J.M. Coronado-Blanco 2002. Artrópodos terrestres de los estados de Tamaulipas y Nuevo León, México. Serie Publicaciones Cientificas No. 4:1-376. (distribution); Ruíz-Cancino et al., 2005Ruíz-Cancino, E., J.M. Coronado-Blanco & J.V. Horta Vega 2005. Conocimiento actual de las avispas depredadoras (Hymenoptera) en Tamaulipas, México. In: Lozano, L. B., A.C. Sandoval, J.V.H. Vega & J.G. Jiménez (Ed.). Biodiversidad tamaulipeca: vol. 1. 164-170. (distribution).
Odynerus fedorensis Cameron, 1908:200, ♂. ♂, Fedor, Texas (leg. Prof. C.F. Baker); Bohart, 1965Bohart, R.M. 1965. Synonymy of North American Odynerini described by Peter Cameron. The Pan-Pacific Entomologist 41 (2):107-113.:109, Holotype ♂ (BMNH). - Bohart, 1965Bohart, R.M. 1965. Synonymy of North American Odynerini described by Peter Cameron. The Pan-Pacific Entomologist 41 (2):107-113.:109 ( listed as synonym of Leptochilus bellulus (Cresson, 1872)); Krombein et al., 1979Krombein, K.V., P.D. Hurd, D.R. Smith & B.D. Burks 1979. Catalog of Hymenoptera in America North of Mexico. Volume 2. Apocrita (Aculeata). Smithsonian Institution Press, Washington D.C. 1199-2209.:1478 ( listed as synonym of Leptochilus bellulus (Cresson, 1872)).