Diodontus gracilis Curtis, 1834:496, Vincent, 1978Vincent, D.L. 1978. A revision of the genus Passaloecus (Hymenoptera: Sphecidae) in America north of Mexico. The Wasmann Journal of Biology 36 (1 & 2):127-198.:177, Lectotype ♂ (National Museum of Victoria, Melbourne, Australia). - Bitsch et al., 2001Bitsch J., H. Dollfuss, Z. Boucek, K. Schmidt, C. Schmid-Egger, S.F. Gayubo, A.V. Antropov & Y. Barbier 2001. Hyménoptères Sphecidae d´Europe occidentale. Vol. 3. 1-459.:100 (listed). - As Passaloecus gracilis: - Bajári, 1957Bajári, E. 1957. Sphecoidea I. Budapest. 1-117.:88 (determination); 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); Dollfuss, 1983Dollfuss, H. 1983. Fam.: Sphecidae. Verlag der österreichischen Akademie der Wissenschaften, Wien. 1-32.:7 (distribution); Lomholdt, O., 1984Lomholdt, O. 1984. The Sphecidae (Hymenoptera) of Fennoscandia and Denmark. Fauna Ent.Scan. 4 , part 1:1-224.:117 (distribution); Pádr, 1989Pádr, Z. 1989. Sphecoidea. In: Sedivý, J. (Ed.). Enumeratio Insectorum Bohemoslovakiae - Check List of Czechoslovak Insects III (Hymenoptera). 165-171. (distribution); Dollfuss, 1991Dollfuss, H. 1991. Bestimmungsschlüssel der Grabwespen Nord- und Zentraleuropas (Hymenoptera Sphecidae) mit speziellen Angaben zur Grabwespenfauna Österreichs. Stapfia 24:1-274.:73 (distribution, listed); Schmidt, 1992Schmidt, K. 1992. Katalog der Spheciden Europas und der Türkei. :1-16. (distribution); Hohmann, H. et al., 1993Hohmann, H., La Roche, F., Ortega, G. & Barquin, J. 1993. Bienen, Wespen und Ameisen der Kanarischen Inseln (Insecta: Hymenoptera: Aculeata) I. Vröff. Übersee-Museum Bremen (Naturwiss) 12 (I-III):14-712. (distribution), 213 (distribution); Negrisolo, 1995Negrisolo, E. 1995. Hymenoptera Sphecidae. In: Minelli A., Ruffo S. & La Posta S. (Ed.). Checklist delle specie della fauna italiana. 1-12. (distribution), 11 (distribution); Schmid-Egger et al., 1995Schmid-Egger, C., S. Risch & O. Niehuis 1995. Die Wildbienen und Wespen in Rheinland-Pfalz (Hymenoptera, Aculeata). Verbreitung, Ökologie und Gefährdungssituation. Fauna Flora Rheinland-Pfalz Beiheft 16:1-296.:202 (Nistweise [in oberirdischen Hohlräumen], prey/host [Blattläuse (Aphidina)]); Klein, W., 1996Klein, W. 1996. De graafwespen van de Benelux - Hymenoptera, Sphecidae. Jeugdbondsuitgeverij, 1-130. (distribution), 99 (distribution); Fowles, A.P., 1996Fowles, A.P. 1996. A provisional checklist of the invertebrates recorded from Wales. 2. Aculeate wasps, bees and ants (Hymenoptera: Aculeata). 1-57. (distribution); Celary, W. et al., 1997Celary, W., W. Czechowski, W. Czechowska, M. Dylewska, H. Garbarczyk, T. Huflejt, M. Malcher, A. Palaczyk & B. Wisniowski 1997. Hymenoptera. In: Razowski, J. (Ed.). Checklist of Animals of Poland. 7-160. (distribution); Blösch, 2000Blösch, M. 2000. Die Grabwespen Deutschlands. Goecke & Evers, Keltern. 1-480.:191 (distribution); Smit, 2000Smit, J. 2000. The wasps of Madeira (Hymenoptera: Chrysididae, Pompilidae, Vespidae, Sphecidae). Entomofauna 21 (13):165-180. (distribution); Bitsch et al., 2001Bitsch J., H. Dollfuss, Z. Boucek, K. Schmidt, C. Schmid-Egger, S.F. Gayubo, A.V. Antropov & Y. Barbier 2001. Hyménoptères Sphecidae d´Europe occidentale. Vol. 3. 1-459. (distribution), 100 (distribution, listed), 428 (prey/host [Hemiptera Aphididae Aphidinae: Uroleucon picridis (Fabr.), Aphis cytisorum Hartig, probablement Megoura viciae Buckton, Holcaphis ?holci H.R.L. - Lachninae: Eulachnus agilis (Kaltenb.). - Calaphidinae: Tuberculatus annulatus (Hartig) (GRANDI 1961, pour Pemphredon brevicornis; DANKS, 1971; PETERS 1976; SCHMIDT 1984)]); Ohl, 2001Ohl, M. 2001. Sphecidae. In: Dathe, H., A. Taeger & S.M. Blank (Ed.). Verzeichnis der Hautflügler Deutschlands (Entomofauna Germanica, Band 4). 137-143. (distribution), 141 (distribution); Jacobs, 2005Jacobs, H.-J. 2005. Lindenius anatolicus Beaumont 1967 - Erstnachweis in Europa und weitere Angaben zur Grabwespenfauna Bulgariens (Hymenoptera: Sphecidae, Crabronidae). Linzer Biologische Beiträge 37 (1):435-456. (distribution); Gogala, 2011Gogala, A. 2011. Sphecid wasps of Slovenia (Hymenoptera: Ampulicidae, Sphecidae and Crabronidae). Scopolia 73 (1-39):. (distribution); Bitsch, 2014Bitsch, J. 2014. Sphéciformes nouveaux ou peu connus de la faune de France et d’Europe occidentale (Hymenoptera, Aculeata). Bulletin de la Société entomologique de France 119 (3):391-419. (distribution).
Passaloecus turionum Dahlbom, 1844:246 - Beaumont, 1947Beaumont, J. de 1947. Sphecidae (Hym.) de l´île de Chypre. Mitt. schweiz. ent. Ges. XX (4):381-402. (distribution), 397 (distribution); Bajári, 1957Bajári, E. 1957. Sphecoidea I. Budapest. 1-117.:88 (determination); Beaumont, 1964Beaumont, J. de 1964. Hymenoptera: Sphecidae. Lausanne. 1-174.:110 (distribution); Lomholdt, 1976Lomholdt, O. 1976. The Sphecidae of Fennoscandia and Denmark. Klampenborg. 1-452. (distribution); Vincent, 1978Vincent, D.L. 1978. A revision of the genus Passaloecus (Hymenoptera: Sphecidae) in America north of Mexico. The Wasmann Journal of Biology 36 (1 & 2):127-198.:177 ( listed as synonym of Passaloecus gracilis (Curtis, 1834)); 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.:1606 ( listed as synonym of Passaloecus gracilis (Curtis, 1834)); Lomholdt, O., 1984Lomholdt, O. 1984. The Sphecidae (Hymenoptera) of Fennoscandia and Denmark. Fauna Ent.Scan. 4 , part 1:1-224.:118 (distribution); Dollfuss, 1991Dollfuss, H. 1991. Bestimmungsschlüssel der Grabwespen Nord- und Zentraleuropas (Hymenoptera Sphecidae) mit speziellen Angaben zur Grabwespenfauna Österreichs. Stapfia 24:1-274.:74 (distribution, listed); Schmidt, 1992Schmidt, K. 1992. Katalog der Spheciden Europas und der Türkei. :1-16. (distribution); Negrisolo, 1995Negrisolo, E. 1995. Hymenoptera Sphecidae. In: Minelli A., Ruffo S. & La Posta S. (Ed.). Checklist delle specie della fauna italiana. 1-12.:11 (distribution); Schmid-Egger et al., 1995Schmid-Egger, C., S. Risch & O. Niehuis 1995. Die Wildbienen und Wespen in Rheinland-Pfalz (Hymenoptera, Aculeata). Verbreitung, Ökologie und Gefährdungssituation. Fauna Flora Rheinland-Pfalz Beiheft 16:1-296.:203 (Nistweise [in oberirdischen Hohlräumen], prey/host [unbekannt]); Klein, W., 1996Klein, W. 1996. De graafwespen van de Benelux - Hymenoptera, Sphecidae. Jeugdbondsuitgeverij, 1-130. (distribution), 100 (distribution); Blösch, 2000Blösch, M. 2000. Die Grabwespen Deutschlands. Goecke & Evers, Keltern. 1-480.:198 (distribution); Bitsch et al., 2001Bitsch J., H. Dollfuss, Z. Boucek, K. Schmidt, C. Schmid-Egger, S.F. Gayubo, A.V. Antropov & Y. Barbier 2001. Hyménoptères Sphecidae d´Europe occidentale. Vol. 3. 1-459.:100 ( listed as synonym of Passaloecus gracilis (Curtis, 1834)); Ohl, 2001Ohl, M. 2001. Sphecidae. In: Dathe, H., A. Taeger & S.M. Blank (Ed.). Verzeichnis der Hautflügler Deutschlands (Entomofauna Germanica, Band 4). 137-143. (distribution), 141 (distribution); Veprek & Straka, 2007Veprek, D. & J. Straka 2007. Apoidea: Spheciformes (kutilky). Acta Entomologica Musei Nationalis Pragae Supplementum 11:191-239. (distribution); Ljubomirov & Yildirim, 2008Ljubomirov, T. & E. Yildirim 2008. . Sofia. 1-316. (distribution).
Passaloecus brevicornis Morawitz, 1864:462 - Vincent, 1978Vincent, D.L. 1978. A revision of the genus Passaloecus (Hymenoptera: Sphecidae) in America north of Mexico. The Wasmann Journal of Biology 36 (1 & 2):127-198.:177 ( listed as synonym of Passaloecus gracilis (Curtis, 1834)); 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.:1606 ( listed as synonym of Passaloecus gracilis (Curtis, 1834)); Dollfuss, 1991Dollfuss, H. 1991. Bestimmungsschlüssel der Grabwespen Nord- und Zentraleuropas (Hymenoptera Sphecidae) mit speziellen Angaben zur Grabwespenfauna Österreichs. Stapfia 24:1-274.:74 ( listed as synonym of Passaloecus turionum Dahlbom, 1844); Bitsch et al., 2001Bitsch J., H. Dollfuss, Z. Boucek, K. Schmidt, C. Schmid-Egger, S.F. Gayubo, A.V. Antropov & Y. Barbier 2001. Hyménoptères Sphecidae d´Europe occidentale. Vol. 3. 1-459.:100 ( listed as synonym of Passaloecus gracilis (Curtis, 1834)).