Acanopsilus comadensis Chemyreva et Kolyada, 2021

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 : 4-7

Acanopsilus comadensis Chemyreva et Kolyada , sp. n.

http://zoobank.org/NomenclaturalActs/ 9CEE159A-DE72-4377-B4BF-6F7826AAB7F8

Figs 3 , 5–11

TYPE MATERIAL. Holotype – ♀, Russia: Primorsky krai, 20 km SE of Ussuriysk, Gornotayozhnoe , 31.VII–5.VIII 1991, S. Belokobylskij ( ZISP) . Paratypes –

Russia: same label as holotype, 1 ♂ ; Primorsky krai, Novonezhinskiy Distr.,

Kangauz [Anisimovka], 18.VIII 1972, 2 ♀, V. Kuslitzky; Vladivostok City, 19 –

21.VIII 1972, 1 ♀, V . Kuslitzky (all in ZISP).

3 – Acanopsilus comadensis sp. n.; 4 – Acanopsilus minimus sp. n.; red arrow – subalar bridge; green arrow – epicnemial bridge; blue arrow – epicnemial pit. Scale bar 0.2 mm.

DESCRIPTION. Female. Body length 2.5 mm; fore wing length 2.1 mm; antennae length 1.6 mm.

Color. Head and mesosoma dark brown, metasoma reddish brown, A13–A14,

mesosoma and petiole dark brown; palpi, legs, tegulae, proximal half of antennae and venation pale brown; distal half of antennae and mandibles brown.

Head in dorsal view nasiform, 1.1 times as long as wide, wider than mesosoma

(23:20), smooth and densely pubescent (Fig. 9). Temples gradually receding behind eye. Occipital flange very narrow and densely pubescent. Head in lateral view as long as high. Eyes bare, its largest diameter shorter than malar space (7:8). Antennal shelf in front view with coriaceous sculpture below toruli. Face smooth. Head in front view with mouth conus (Fig. 6). Clypeus transverse, 0.8 times as high as wide.

Tentorial pits small. Labrum small, semicircular, weakly visible. Mandibles simple.

Antennae slender, weakly broadened apically. A1 0.86 times as long as width of head. Ratios of length to width of A1‒A14 shown on Fig. 10.

Mesosoma weakly compressed, slightly higher than wide (10:9). Neck and pronotal collar situated almost in same plane ( Fig. 3 ). Pronotal anterior corners sharped,

epomia strongly prominent and interrupt by pronotal pits. Pronotal collar, corners and pits pubescent; neck dorsally and sides of pronotum mainly bare. Mesoscutum

0.77 times as long as wide, convex, pubescent with semi-erect setae. Notauli deep and complete throughout. Anterior scutellar pit deep, large, bare and rounded.

Scutellum large, convex, widened posteriorly. Axillar depression without verriculate tubercles. Mesopleuron bare medially and pubescent elsewhere, with subalar bridge postero-dorsally and without epicnemial bridge antero-ventrally;

epicnemial pit deep and densely pubescent; mesopleural pit totally absent ( Fig. 3 ).

Metanotum narrow, with smooth and bare lateral sides and pubescent metascutellum; metascutellum with three short longitudinal keels, median keel the highest. Propodeum transverse, 0.64 times as long as wide, weakly pubescent,

median propodeal keel simple, plicae process complete (Fig. 7). Side of propodeum densely pubescent, with two longitudinal keels ( Fig. 3 ). Legs slender.

Wing venation. Fore wing with distinct costal and subcostal veins; radial cell open; basal vein distinct but paler than subcosta; distance from marginal vein to basal vein longer than marginal vein length (14:12); stigmal vein as long as wide of marginal vein (Fig. 8). Poststigmal, postmarginal and radial veins absent.

Metasoma. Petiole cylindrical, 1.25 times as long as wide, with longitudinal keels, bare dorsally and densely pubescent laterally and ventrally; posterior margin of petiole weakly arcuate (Fig. 7). T 2 anteriorly with short striation similar in length;

T 3‒ T 6 narrow, with few setae laterally and fine micropunctation medially; T 7 and

T 8 elongate, compressed laterally. S2 without protuberans anteriorly; with short grooves and dense pubescent at base and numerous setae posteriorly; S3‒S5 narrow,

with scattered long setae; S6 entirely pubescent, distinctly elongate and compressed.

Male. Body length 2.3 mm. Similar to female except following characters: antenna filiform, longer than body length; antennomeres cylindrical, covered by uniform semi-erect pubescence; A1 slender, 0.63 times as long as width of head; A3 with shallow emargination, with keel extending almost half of A3 length; ratios of length to width of A1‒A14 shown on Fig. 11; petiole more elongate 0.4 times as wide as long; metasoma not compressed at top; T 7 transverse; T 8 and S8 subtriangular,

rounded apically; S2–S7 with numerous semi-recumbent scattered setae; S8 finely pubescent.

Figs 5–11. Acanopsilus comadensis sp. n., ♀ (5–7, 9, 10) and ♂ (8, 11): 5 – habitus,

lateral view; 6 – face; 7 – mesosoma and base of metasoma, dorsal view; 8 – body and forewing venation, dorsal view; 9 – head and mesosoma, dorsal view; 10, 11 – antennae.

Scale bar: 5 – 1 mm; 8, 10, 11 – 0.5 mm; 6, 7, 9 – 0.2 mm.

VARIATION. Female. Body length 2.5–3.0. Significant variation is not detected.

DIAGNOSIS. This species distinctly differs from all other Acanopsilus species by the combination of the following characters: medium size, brunneous species;

head and mesosoma densely pubescent (occipital flange medially, mesopleuron above epicnemial pit and base of Т 2 pubescent); eyes bare; marginal vein distinctly shorter than distance from it to basal vein; S2 without protuberans anteriorly.

DISTRIBUTION. Russia (Far East).

ETYMOLOGY. The name is derived from the Latin noun coma (hear) and an adjective densa (dense) and refers to the dense pubescence of head and mesosoma that is typical for this new species.

Figures

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