This mentioned taxonomy is an attempt to make an conclusive assignment from the different classifications of various scientists. Because the taxonomy may change due to the latest investigative methods and other findings, our map is a guide only.
W. J. Pulawski, 2014 - Family group names and classification - Catalog of Sphecidae Sensu Lato (= Apoidea excluding Apidae) (), - (unpublished, English)
A. V. Antropov, 2011 - A new tribe of fossil digger wasps (Hymenoptera: Crabronidae) from the Upper Cretaceous New Jersey amber and its place in the subfamily Pemphredoninae - Russian Entomological Journal (20), 229-240 (journal article, English)
A. V. Antropov, 2009 - Rovnoecus, a new genus of digger wasps (Hymenoptera, Crabronidae, Pemphredoninae) from the Rovno Amber - Paleontological Journal (43), 1019-1023 (journal article, English)
M. Ohl, 2009 - A new genus and species of apoid wasps from Saxonian amber (Hymenoptera: Apoidea: Crabronidae) - Denisia (26), 145-150 (journal article, English)
A. V. Antropov, 2009 - Taxonomic names, in Rovnoecus, a new genus of digger wasps (Hymenoptera, Crabronidae, Pemphredoninae) from the Rovno Amber - Paleontological Journal (43), 1019-1023 (journal article, English)
A. V. Antropov, 2000 - Digger wasps (Hymenoptera, Sphecidae) in Burmese amber - Bulletin of the Natural History Museum, Geology Series (56), 59-77 (journal article, English)
A. P. Rasnitsyn, 1998 - Systematic part, in Wasps (Insecta: Vespida = Hymenoptera) from the Purbeck and Wealden (Lower Cretaceous) of southern England and their biostratigraphical and palaeoenvironmental significance - Cretaceous Research (19), 329-391 (journal article, English)
E. Budrys, 1993 - Digger wasps of the subfamily Pemphredoninae (Hymenoptera, Sphecidae) from the Baltic and Taimyr amber - Acta Entomologica Lithuanica (11), 34-56 (journal article, English)
F. M. Carpenter, 1992 - - Treatise on Invertebrate Paleontology Part R, Arthropoda 4: Superclass Hexapoda (3/4), 1-655 (compendium, English)
M. Sorg, 1986 - Grabwespen der Gattung Passaloecus aus fossilen Harzen (Hymenoptera, Sphecoidea, Pemphredoninae). Passaloecus microceras n. sp., Baltischer Bernstein, oberes Eozän. Passaloecus munax n. sp., Bitterfelder Bernstein, unteres Miozän - Palaeontologische Zeitschrift (60), 277-284 (journal article, English)
Y. C. Hong, 1983 - Fossil insects in the diatoms of Shanwang - Bulletin of the Tianjin Institute of Geology and Mineral Resources (8), 1-15 (journal article, Chinese)
H. E. Evans, 1973 - Cretaceous aculeate wasps from Taimyr, Siberia (Hymenoptera) - Psyche (80), 166-178 (journal article, English)
S. A. Rohwer, 1909 - New Hymenoptera from western United States - Transactions of the American Entomological Society (35), 99-136 (journal article, English)
T. D. A. Cockerell, 1906 - Fossil Hymenoptera from Florissant, Colorado - Bulletin of the Museum of Comparative Zoology, Harvard College (50), 33-58 (journal article, English)
P. A. Latreille, 1796 - - Précis des Caractères Génériques des Insectes Disposés dans un Ordre Naturel (), 1-201 (book, French)