Key to Australian genera of Ctenocerini sensu Evans (1972) Females 1 Antenna with 11 flagellomeres (exceptional for female Aculeata); clypeus subangularly produced apically; malar space longer than pedicel width; in anterior view, vertex forming a low arc above level of eye tops; and metasoma strongly compressed apically (Fig. 5a) Cteniziphontes Evans - Antenna with 10 flagellomeres; clypeus truncate or emarginate apically (Figs 1a, 2a, 3a, 4a and 5b,c); malar space shorter than pedicel width, except in Evansiclavelia Pitts, Rodriguez & Shimizu, gen. nov. (Fig. 4a); in anterior view, vertex moderately or strongly elevated above level of eye tops; and metasoma not compressed laterally in Apoclavelia Evans but compressed laterally in others......................................... 2 2 Clypeus nearly as wide as LID (Fig. 5b), transversely and rather abruptly bent downward towards its apical margin; propodeal declivity not sharply divided from dorsum; and metasoma shallowly and dorsoventrally compressed posteriorly.................................................. Apoclavelia Evans - Clypeus much narrower than LID, not transversely deflected downward towards its apical margin (Figs 1a, 2a, 3a, 4a and 5c); propodeal declivity sharply divided from dorsum, except in Evansiclavelia Pitts, Rodriguez & Shimizu, gen. nov. (Fig. 4e); and metasoma laterally compressed apically........ 3 3 Frontal bridge present (Fig. 4a, arrow); malar space longer than pedicel width; propodeal dorsum and declivity not sharply divided (Fig. 4e); and transverse groove on S2 situated anteriorly to its basal third, almost concealed by posterior margin of S1..................................... Evansiclavelia gen. nov. - Frontal bridge absent (Figs 1a, 2a, 3a and 5c); malar space much shorter than pedicel width; propodeal dorsum and declivity sharply divided, both forming angle (Figs 1c,e, 2f,h and 3e,g); and transverse groove on S2 situated posteriorly to its basal third..................................................................... 4 4 Clypeus flat except depressed basally adjacent to antennal sockets, emarginate apically (Fig. 5c); labrum completely concealed; and transverse groove on S2 weak...................................................... Austroclavelia Evans - Clypeus convex medially, truncate apically (Figs 1a,b, 2a,b and 3a); labrum well exserted, usually at right angle to clypeus (Figs 1b and 2b); and transverse groove on S2 sharply impressed............................................................................... 5 5 All tarsal claws unidentate (Fig. 1j); apicomedial corner of scape produced beyond origin of flagellum (Figs 1b,d and 2d); vertex extraordinarily elevated above eye tops (Figs 1a and 2a), distance from eye tops to vertex crest, in profile, about two-fifths of eye height or much more (Figs 1c and 2c); posterior ocelli situated much below level of eye tops; gena, in profile, as broad as or broader than eye, strongly narrowing above and below (Figs 1c and 2c); and gena, in dorsal view, scarcely narrowing posteriad, hence its shape nearly rectangular (Figs 1d and 2e).............. Maurillus Smith - All tarsal claws bifid (Fig. 3f); apicomedial corner of scape not produced beyond origin of flagellum (Fig. 3b,d); vertex moderately elevated above eye tops (Fig. 3a), distance from eye tops to vertex crest, in profile, less than one-fifth of eye height (Fig. 3e); posterior ocelli situated at level of eye tops; gena, in profile, much narrower than eye, gently narrowing above and below (Fig. 3e); and gena, in dorsal view, narrowing posteriad, forming rather low arc (Fig. 3b).............................................. Maurilloides gen. nov.

Published as part of Shimizu, Akira, Pitts, James P, Rodriguez, Juanita, Wahis, Raymond & Yoshimura, Jin, 2021, Systematics and convergent evolution in three Australian genera of Pepsinae spider wasps (Hymenoptera: Pompilidae), pp. 301-316 in Austral Entomology 60 (2) on pages 2-3, DOI: 10.1111/aen.12530, http://zenodo.org/record/4627871

{"references": ["Evans HE. 1972. The tribe Ctenoceratini in Australia (Hymenoptera: Pompilidae). Journal of the Australian Entomological Society 11, 244 - 252."]}