Acanosema, Kieffer, 1908

Chemyreva, V. G. & Kolyada, V. A., 2021, Review of the subtribe Psilommina (Hymenoptera: Diapriidae, Belythinae) from Russian fauna, Far Eastern Entomologist 436, pp. 1-34 : 11

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.

Figures

Figs 49–56. Acanosema rufum, ♀ (49–53, 56) and ♂ (54, 55): 49 – head and mesosoma,

Figs 1–4. Mesosoma, lateral view: 1 – Acanopsilus heterocerus; 2 – Acanosema nervosum;

Figs 57–63. Acanosema tenuicorne, ♀ (57–62) and ♂ (63): 57 – mesosoma and base of

Figs 64–69. Acanosema setigerum sp. n., ♀ (holotype): 64 – habitus, lateral view; 65 –