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Accurate fossil identification has become increasingly relevant with the widespread use of phylogenetic divergence time estimation methods, which rely on fossil data to determine clade hard-minimum ages. Here we revise, diagnose and illustrate known spider wasp (Hymenoptera: Pompilidae) fossil species and place them within the latest Pompilidae phylogenetic hypothesis.  Ceropalites infelix  Cockerell, from the Florissant Fossil Beds (Priabonian), is no longer recognized as Pompilidae, but as Aulacidae.  Agenioideus saxigenus  (Cockerell)  comb. nov. ,  Deuteragenia wettweri  (Statz)  comb. nov. ,  Caputelus scudderi  (Cockerell, 1906)  comb. nov. ,  Pepsinites avitula  (Cockerell, 1941)  comb. nov. ,  Pepsinites contentus  (Theobald, 1937)  comb. nov. ,  Pepsinites florissantensis  (Cockerell, 1906)  comb. nov. ,  Pepsinites laminarum  (Rohwer, 1909)  comb. nov. ,  Pepsinites scelerosus  (Meunier, 1919)  comb. nov. ,  Pepsinites cockerellae  (Rohwer, 1909)  comb. nov. ,  Pompilinites coquandi  (Theobald, 1937)  comb. nov. ,  Pompilinites depressus  (Statz, 1936)  comb. nov. ,  Pompilites incertus  (Theobald, 1937)  comb. nov.,   Pompilites induratus  (Heer, 1849)  comb. nov.,   Pompilites fasciatus  (Theobald, 1937)  comb. nov.,  and  Pompilites senex   comb. nov.  are new combinations. Twenty-three fossil species of spider wasps are now recognized in 13 genera. Four new genera are proposed:  Caputelus  Waichert & Pitts  gen. nov.,   Pompilites  Rodriguez  gen. nov.,   Pompilinites  Rodriguez & Waichert  gen. nov. , and  Pepsinites  Rodriguez & Waichert  gen. nov. , of which the three latter are collective-group names for fossils with taxonomic uncertainty. One species of fossil spider wasp is described:  Deuteragenia catalunyia  Rodriguez, Waichert & Pitts  sp. nov. , from the Bellver deposits in Catalonia, Spain. Five of the 23 known species can be used to determine hard-minimum age for calibrations of genera stem-groups ( Agenioideus ,  Anoplius ,  Cryptocheilus ,  Deuteragenia ,  Priocnemis ). The fossil belonging to the stem-group of the tribe Ageniellini ( Chubutholites ) is not recommended for calibration because of the high uncertainty in its age and taxonomy. The remaining taxa can be assigned to the lineage comprising Pompilinae + Pepsinae (12 species) or crown-group Pompilidae (four species).

The geological record and phylogeny of spider wasps (Hymenoptera: Pompilidae): A revision of fossil species and their phylogenetic placement