Genus Stenancistrocerus de Saussure, 1863

Stenancistrocerus de Saussure 1863: 216 (division of subgenus Ancistrocerus Wesmael, 1836 of genus Odynerus Latreille, 1802). Type species: Odynerus atropos Lepeletier de Saint-Fargeau, 1841, by subsequent designation of Bequaert 1925: 63; van der Vecht & Fischer 1972: 57–58; Kurzenko 1977: 551; 1981: 108; Gusenleitner 1988: 112; 2000: 61–62; 2013a: 76–77; 2015: 1327–1382; Castro & Dvořák 2009: 299; Oehlke 2012: 599; Antropov & Fateryga 2017: 189.

Atropancistrocerus Blüthgen 1938: 444, 461. Type species: Odynerus (Ancistrocerus) hispanicus Dusmet y Alonso, 1903, by original designation; synonymized by Giordani Soika 1939: 77–78.

Diagnosis. Wasps of the genus Stenancistrocerus differ from other genera of the tribe Odynerini (sensu Hermes et al. 2014) by combination of the following characters: anterior face of pronotum with foveae; tegula protruding posteriorly, finely punctate; postscutellum sharply edged posteriorly; propodeal valvula bilamellate; tergum 1 not petiolate, with transverse carina; distal part of vertical face of tergum 1 smooth, without distinct punctures; both terga 1 and 2 without apical lamella; sternum 2 flat or evenly concave, not angulated at the base (Kurzenko 1981; Gusenleitner 2013a; Tan et al. 2018a, 2018b). Representatives of the genus are small and slender wasps.

Subgenera included. The genus includes two subgenera: Paratropancistrocerus Blüthgen, 1938 [type species: Odynerus (Ancistrocerus) transcaspicus Kostylev, 1935, by original designation] has clypeus in both sexes with rather shallow emargination with very small tooth in its center or without it; Stenancistrocerus s. str. has clypeus in both sexes with deep emargination with distinct tooth in its center (Gusenleitner 2013a).

Species included. Stenancistrocerus (Paratropancistrocerus) biblicus (Giordani Soika, 1952) (Jordan, Israel), S. (P.) excoriatus (Morawitz, 1895) (Turkmenistan), S. (P.) obstrictus (Morawitz, 1895) (Russia, Transcaucasia), S. (P.) punjabensis (Nurse, 1903) (India), S. (P.) transcaspicus (Kostylev, 1935) (Iran, Turkmenistan, Uzbekistan, Kyrgyzstan, Kazakhstan, China), S. (Stenancistrocerus) alluaudi (Dusmet y Alonso, 1925) (Morocco, Algeria), S. (S.) atropos (Lepeletier de Saint-Fargeau, 1841) (Morocco, Algeria, Tunisia, Libya), S. (S.) hispanicus (Dusmet y Alonso, 1903) (Spain), S. (S.) leonhardi Gusenleitner, 2015 (Oman) .