Plenoculus peckhami Ashmead, 1897:130 - As Solierella peckhami: - 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); Frohlich et al., 1988Frohlich, D.R., W.H. Clark, F.D. Parker & T.L. Griswold 1988. The xylophilous bees and wasps of a high, cold desert: Leslie Gulch, Oregon (Hymenoptera: Apoidea, Vespoidea). The Pan-Pacific Entomologist 64 (3):266-269. (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).
Plenoculus niger Ashmead, 1899:339 - 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.:1637 ( listed as synonym of Solierella peckhami (Ashmead, 1897)).
Silaon rohweri Bridwell, 1920:398 - 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.:1637 ( listed as synonym of Solierella peckhami (Ashmead, 1897)).
Solierella arenaria Krombein, 1939:139 - 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.:1637 ( listed as synonym of Solierella peckhami (Ashmead, 1897)).