Spilomicrus lubomasneri, Chemyreva, Vasilisa G., 2015

Chemyreva, Vasilisa G., 2015, Three new species of the parasitic wasps genus Spilomicrus Westwood (Hymenoptera: Diapriidae) from the East Palaearctic Region, Zootaxa 4059 (1), pp. 191-200 : 197-200

Spilomicrus lubomasneri sp. nov.

( Figs 17–25 )

Diagnosis. Spilomicrus lubomasneri sp. nov. easy differs from the all known Palaearctic species by having the well impressed and full notauli, broad occipital flange, lateral pronotal area divided ventrally by broad groove ( Fig. 17 ) and frons above toruli with two deep pits divided by a keel ( Fig. 24 ). This species is similar to S. notaulus sp. nov., but it differs from it by characters indicated in the key (see couplet 2) and three additional following features: notauli not connected with transscutal line by groove ( Fig. 6 ) (connected in S. notaulus ), acetabular carina weakly shifted posteriorly in its median part ( Fig. 25 ) (strongly shifted in S. notaulus ( Fig. 26 )) and pronotal cervical area not separated by ridge from lateral area (separated by ridge in S. notaulus ( Figs 1, 4 ))

Description. Holotype. Female ( Figs 17–20, 22–25 ). Body length 3.6 mm; fore wing length 2.6 mm; antenna length 2.2 mm.

Colour. Body mainly black; tegula, legs, distal part of A1 and antennal segments A2–A7 reddish brown; A8– A13 dark brown; mandible black; palpi pale brown.

Head. Head in dorsal view distinctly transverse (30:22), narrower than width of mesosoma (30:33), with antennal shelf prominent ( Figs 17, 24 ); in lateral view shorter than high (22:27). Frons, genae and vertex with sparse delicate punctures, face without punctation. Tentorial pit absent. Malar sulcus complete and deep. Clypeus transverse (4:5), semicircular, weakly convex. Epistomal sulcus distinct. Ratio of pleurostomal distance to width of head 16:29. Mandible long, bidentate, teeth subequal. Eye height shorter than half head height (13:30) and longer than malar space (13:9); eye large, with long sparse setae, not surrounded by grooves. Ocelli large ( Fig. 24 ); LOL 1.5 times diameter of anterior ocellus; POL longer than OOL (8:5). Occipital flange broad, smooth, without long setae. Postgenal cushion not dense ( Figs 17–18 ).

Antenna. A1 cylindrical, covered with dense pale setae, with two projecting lamellae apically overlapping base of A2. A2 compressed, in lateral view rectangular (7:9); in dorsal view basally attenuate and broadened apically. Antenna with non-abrupt clava, A8–A13 with MGS brush and flattened on ventral side. In lateral view, connection between A8–A13 situated dorsally. A13 distinctly narrower than A12 and with ventral tip. In dorsal view, antennal segment length/width: A1 38:8; A2 9:6.5; A3 11:6; A4 10:6; A5 9:6; A6 8:6; A7 8:7; A8 9:8; A9 9:9; A10 9:10; A11 9:10; A12 9:10; A13 10:8.

Mesosoma. Mesosoma in lateral view longer than high (50:27); in dorsal view, longer than wide (50:33). Neck bare, with deep longitudinal grooves. Pronotum with shoulders prominent and rounded, with median area perpendicular to mesoscutum, not separated by ridge from lateral area. Lateral pronotal area divided ventrally by broad groove. Pronotal cushion dense. Anterior incision of mesopleuron large ( Fig. 17 ). Propleuron with short silvery pubescent, without reticulation. Mesopleuron smooth and bare laterally and pubescent ventrally, with horizontal depression above sternaulus; the sternaulus present as sharp keel extending from anterior incision of mesopleuron to posterior margin of mesopleuron. Acetabular carina prominent, sharp and shifted posteriorly in its median part ( Fig. 25 ). Postacetabular sulcus absent. Mesopleural epicoxal carina present only laterally; mesopleural epicoxal sulcus and carina on ventral side absent. Mesonotum wider than long (40:32). Notauli complete, broad, deep posteriorly and shallow anteriorly. Humeral sulcus distinct, broad and long. Scutellum flattened and with two large circular anterior scutellar pits ( Fig. 18 ). Axilla with large broad grooves along posterior margin. Axillar depression pubescent. Lateral scutellar pit strongly enlarged, broad and long. Posterior scutellar pits large and deep ( Fig. 18 ). Metascutellum coarsely rugose, sparsely pubescent, with projecting median and one lateral keel. Propodeum in dorsal view with posterior margin arcuate, entirely coarsely rugose, without dense pilosity; median propodeal keel projecting as long spine directed upward. Legs long and slender. All legs with trochantellus.

Wings. Fore wing clear, longer than wide (51:21). Marginal vein 2.0 times as long as wide. Stigmal vein shorter than width of marginal vein. Costal and submarginal veins tubular; costal vein not pigmented. Submarginal vein sclerotized. Basal vein nebulous.

Metasoma. Petiole cylindrical, elongate (22:8), with deep longitudinal grooves and long erect setae on lateral and ventral sides; on dorsal side, longitudinal grooves and erect setae present on anterior 3/4 of petiole length, posterior part of petiole with short recumbent pilosity. Petiole length/mesosoma length 12:25. T2 with short sparse setae and micropunctures posteromedially. T3–T5 with dense punctation and one row of long setae, the setae denser on lateral areas of tergites. T5 expanded laterally and with numerous setae at sides. T6 small, T7 pointed. S2 smooth, with dense cushion at anterior margin and with scattered setae posteriorly. S3–S5 with dense punctation and one row of long setae. Apical sternite entire with coarse and dense punctation, and with short setae apically.

Male ( Fig. 21 ). Body length 2.9–3.2 mm. Similar to female, but differs by features of antennal structures and petiole. Antenna not longer than body, filiform; A3–A13 reddish, reddish brown or dark brown, A2 and apical part of A1 red, basal part of A1 black. A1 with small lamellae. A2 truncate in lateral view. A4 weakly excavated, and with keel extending little beyond middle of segment. Antennal segment length/width: A1 17:4.5; A2 4:4; A3 12:5; A4 13:5; A5 11,5:4.5; A6 11:4.5; A7 10:4.5; A8 9:4; A9 9:4; A10 9:4; A11 9:4; A12 8:3; A13 11:3. Petiole length/ mesosoma length 5:2.

Host. Unknown

Etymology. Named in honor of Dr Lubomir Masner, a well-known Canadian hymenopterist, and expert on Proctotrupoidea and Platygastroidea.

Type material. Holotype: ♀ ( ZISP), labelled “ Russia, Primorskiy Terr., near Ussuriysk 1.VIII.1993, S. Belokobylskij leg.”, “ Holotype. Spilomicrus lubomasneri Chemyreva det. 2014”.

Paratypes. RUSSIA. Primorskiy Terr., same label as in holotype (1♀ ZISP); Ussuriysk District, 20–23. VII.1972, M. Kozlov, (1♂, ZISP); Ussuriysk District, Gornotayozhnoye, 43 ᵒ 66 ′ N, 132 ᵒ 25 ′ E, 11–12.IX.1999, M. Michailovskaya (2♀, CNCI); Laso Nature Reserve, 11–17. VII.1993, A. Khalaim (1♂, ZISP); same locality, 22– 24. VII.1993 and 25–26. VIII.2006, S. Belokobylskij (3♀, 5♂, ZISP, CNCI, BMNH); same locality, 5–25. VII.2005, K. Makarov, (2♂, ZISP); near Nezhino, 16–18. VII.1993, S. Belokobylskij (2♂, ZISP).

Figures

FIGURES 17 – 25. Spilomicrus lubomasneri sp. nov., female (17 – 20, 22 – 25) and male (21). 17, head, lateral view; mesosoma, dorsal view (18) and ventral view (25); 19, petiole, dorsal view; 20, whole insect, lateral view; 21, 22, whole antenna; 23, face; 24, head, frontal view.

FIGURES 1 – 9. Spilomicrus notaulus sp. nov., female (1 – 2, 6 – 9) and male (3 – 5). 1, 4, head, dorsal view; 2, 5, whole insect, lateral view; 3, face; 6, mesosoma, dorsal view; 7, whole antenna; 8, petiole, dorsal view; 9, antenna (A 2 – A 4); DP, pleurostomal distance; WH, width of head.

FIGURES 26 – 28. Spilomicrus stigmaticalis Westwood, female (28) and male (26 – 27). 26, mesosoma, ventral view; 27 antennae (A 2 – A 5); 28, head, dorsal view.