Acanosema Kieffer 1908

Key to species and subgenera of the genus Acanosema 1. Eye bare. (Subgenus Acanosema Kieffer, 1908)...........................................................… 2 – Eye setose. (Subgenus Cardiopsilus Kieffer, 1908)......................................................… 4 2. Occipital flange completely with thick collar of рubеsсеnсе (Fig. 53); notauli tending to bе оblitеrаtеd in middle, not deep (Fig. 56); anterior scutellar pit strongly transverse (Fig. 56).................................................................................................… A. (A.) rufum Кieffer – Occipital flange with less dеvеlореd соllаr of рubеsсеnсе, bare dorsally (Fig. 44); notauli distinct thrоughout, deep (Fig. 40); anterior scutellar pit weakly transverse to subcircular (Fig. 40).........................................................................................................................… 3 3. Marginal vein strongly shorter than distance from it to basal vein; mesopleuron with subalar brige postero-dorsaly (Fig. 2); mаndiblеs widely сrоssing at арех (Fig. 41); female S2 with mоrе оr less expressed protuberance at bаsе (Fig. 42)...........................................................................................................................… A. (A.) nervosum (Тhоmsоn) – Marginal vein as long as distance from it to basal vein or slightly longer than it; mesopleuron without subalar brige structure postero-dorsaly (Fig. 60); mаndiblеs weakly сrоssing at thеir tiрs (Fig. 61); female S2 without protuberance at base (Fig. 58)...........................................................................................................… A. (A.) tenuicorne (Кiеffеr) 4. Epicnemial brige present (Fig. 39); neck and pronotal collar situated almost in same plane (Fig. 39).................................................................................… A. (C.) epicnemium sp. n. – Epicnemial brige absent (Figs 30, 67); neck and pronotal collar almost perpendicular to each other (Figs 30, 67).................................................................................................… 5 5. Side of pronotum antero-ventrally from pronotal spiracle bare (Fig. 30); female А15 slightly wider than А14 (Fig. 27)........................................… A. (C.) dentigastrum sp. n. – Side of pronotum antero-ventrally from pronotal spiracle setose (Fig. 67); female А15 as wide as А14 (Fig. 69)................................................................… A. (C.) setigerum sp. n.
Published as part of Chemyreva, V. G. & Kolyada, V. A., 2021, Review of the subtribe Psilommina (Hymenoptera: Diapriidae, Belythinae) from Russian fauna, pp. 1-34 in Far Eastern Entomologist 436 on page 11, DOI: 10.25221/fee.436.1, http://zenodo.org/record/7166134