Psilomma calaris 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 : 27-29

Psilomma calaris Chemyreva et Kolyada , sp. n.

http://zoobank.org/NomenclaturalActs/ C2829679-37E0-4D63-B5AD-7F59B6B823A1

Figs 79–85

TYPE MATERIAL. Holotype – ♀, Russia: Primorsky krai: 20 km SW of Krou-

novka, 2–5.VIII 1993, S. Belokobylskij ( ZISP). Paratypes (all in ZISP if not stated otherwise) – Russia: Primorsky krai: Ussuriysk Nature Reserve , 26–30 VII.1972 , 1

♂, M. Kozlov; Lazovskiy Nature Reserve, Tachingouza Bay, 7–8.VIII 1972, 1 ♂,

M. Kozlov; Lazovskiy Nature Reserve, 9–17.VII 2008, 1 ♂, A. Khalaim; vicinity of

Anisimovka, Krinichnaya Mt., 14–15.VIII 2006, 2 ♂, S. Belokobylskij; Sakhalinskaya oblast: Kuril Islands, Urup, Kama River, 7.VIII 2000, 1 ♂, A. Lelej; Japan:

Honshu, Yamanashi Pref., Koshushi, Hikawa Valley, Flight intercept trap, 20–27. V

2017, 1 ♀, 3 ♂, J. Imura ( KPMNH) .

DESCRIPTION. Female. Body length 2.5 mm; fore wing length 2.6 mm;

antennae length 2.1 mm.

Colour. Head, mesosoma black; metasoma and distal part of antennae dark brown; mandibles, venation, tegulae, palpi and legs yellowish brown.

Head in dorsal view weakly nasiform ( Fig. 82 ), wider than long (11:10), wider than mesosoma (11:10), smooth, covered with recumbent pubescence, more short and dense on face and genae. Temples sharply receding behind eye. Occipital flange very narrow, smooth. Head in lateral view higher than length (23:20). Malar space shorter than largest diameter of eye (15:17). Eyes coved with short pubescence.

Antennal shelf in front view with fine coriaceous sculpture below toruli. Head in front view with weak mouth conus ( Fig. 80 ). Clypeus 0.82 times as high as wide.

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

Antennae slender, weakly broadened apically. Ratios of length to width of

A1‒A 12 in dorsal view shown on Fig. 83 .

Mesosoma weakly compressed, slightly higher than wide (24:21), in dorsal view longer than wide (24:33). Neck bare, with median carina and lateral deep depression

( Fig. 82 ). Sides of pronotum bare; pronotal collar pubescent. Epomia sharp, strongly prominent, interrupted by pronotal pit; pronotal pit finely pubescent. Mesoscutum

0.75 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 mainly pubescent but bare medially and postero-medially,

view; 80 – face; 81 – mesosoma and base of metasoma, dorsal view; 82 – head and mesosoma,

dorsal view; 83, 85 – antennae; 84 – antenna, proximal part. Scale bar: 79 – 1 mm; 83, 85 –

0.5 mm; 80–82 – 0.2 mm.

with subalar bridge postero-dorsally and epicnemial bridge antero-ventrally; epicnemial pit not deep, pubescent; mesopleural pit totally absent. Metanotum narrow,

with smooth and bare lateral sides and pubescent metascutellum; metascutellum with three short longitudinal keels, median keel the highest. Propodeum 0.54 times as long as wide, almost bare medially and densely pubescent laterally, median propodeal keel simple; posterior margin of propodeum without any projections

( Fig. 81 ). Side of propodeum entirely pubescent, with several longitudinal keels.

Legs slender.

Wing venation. Fore wing with distinct costal, subcostal and basal veins; radial cell open; distance from marginal vein to basal vein equal to marginal vein length;

stigma vein as long as radial vein and slightly longer than postmarginal vein. Poststigmal and cubital veins nebulous.

Metasoma. Petiole weakly broadened posteriorly, as long as wide, with shallow striation, bare dorsally and pubescent ventrally. T2 anteriorly bare, with short striation, median groove the longest ( Fig. 81 ); posterior part of T2 covered with scattered long setae; T3‒T6 narrow, with few setae; T7 and T8 elongate, strongly compressed laterally, weakly setose. S2 with short grooves at base, entirely pubescent with semirecumbent setae anteriorly and recumbent setae posteriorly; S3‒S5 narrow,

entirely pubescent; S6 distinctly elongate and compressed, shortly pubescent.

Male. Body length 2.5–3.6 mm. Similar to female except following characters:

antenna filiform, longer than body length; antennomeres cylindrical, covered by uniform semi-erect pubescent; A1 more stout, about 0.5 times as long as head width;

A3 with shallow emargination and keel extending to 0.30–0.37 of A3 length ( Fig.

84); ratios of length to width of antennomeres shown on Fig. 85 ; petiole elongate

0.7–0.8 times as wide as long; T7 transverse, not compressed; S6–S7 narrow, transverse; T8 and S8 subtriangular, rounded apically.

VARIATION. Female. Body length 2.5–3.8. Forewings as long as body length to distinctly shorter.

DIAGNOSIS. This new species can be distinguished from all other Psilomma species by features given in the key (couples 1 and 2).

DISTRIBUTION. Russia (Far East), Japan (Honshu).

ETYMOLOGY. The name of this species is an arbitrary euphonious combination of letters, with no special meaning.

Figures

Figs 79–85. Psilomma calaris sp. n., ♀ (79–83) and ♂ (84, 85): 79 – habitus, lateral