Spilomicrus bicarinatus Chemyreva, 2018

Chemyreva, V. G., 2018, The Eastern Palaearctic parasitic wasps of the genus Spilomicrus Westwood, 1832 (Hymenoptera: Diapriidae), Far Eastern Entomologist 357, pp. 1-20 : 6-9

Spilomicrus bicarinatus Chemyreva , sp. n.

Figs 10‒15

TYPE MATERIAL. Holotype – ♀, Russia: Primorskiy Terr., 15 km E from

Chernigovka, 20.VII 1991, S. Belokobylskij ( ZISP). Paratypes. Russia: Primorskiy

Terr.: 20 km E from Ussuriysk, 7.IX 1983, 1♀, Budris ( ZISP); vicinity station of

Khasan, 29.VIII 1988, 1♀, SB ( ZISP); Kamenushka, 31.VIII 1988, 1♀, 1♂, SB

( ZISP); 20 km SW Krounovka. 4–5.VIII 1991, 3♂, SB ( ZISP) ; vicinity of SpasskDalniy , 10–27.VII 1991, 6♀, 4♂, SB ( ZISP) ; same locality, 9.VII–7.VIII 1993 and

24–25.VIII 1981, 3♀, 7♂, SB ( ZISP); vicinity of Anisimovka, 10.VIII 1991, 4♂,

SB ( ZISP); 15 km E from Chernigovka, 20.VII 1991, 4♀, 9♂, SB ( ZISP, BMNH) ;

15 km E from Dmitrievka, 21.VII 1991, 1♀, 1♂, SB ( ZISP); Ussuriyskiy District ,

Gornotayozhnoye, 43ᵒ66′N, 132ᵒ25′E, 7‒8.VIII 1999, 1♀, M. Michailovskaya

( CNCI); Ussuriysk Nature Reserve , 31.VII–5.VIII 1991, 6♀, 14♂, SB ( ZISP,

BMNH); same locality, 28–29.VIII 1982, 1♀ , V. Tobias ( ZISP); same locality ,

3.VIII 1961, 1♀, Shuvakhina ( ZISP); 15 km SSE from Nezhino, 16–18.VII 1993,

2♀, 2♂, SB ( ZISP); 30 km SE from Ussuriysk, 17–19.VII 2001 , 1♀, 13♂, SB

( ZISP); Lazo Nature Reserve , 22–24.VII 1993, 5♂, SB ( ZISP); same locality, VII

2007, 11♀, 1♂, K. Makarov ( ZISP); same locality, 26.VII–8.VIII 1972 , 1♀, 1♂, M.

Kozlov ( ZISP); vicinity of Vladivostok, 30.VII 2001, 1♀, SB ( ZISP). Sakhalin

Prov.: Kunashir Island, promontory Alekhino, 19–21.VIII 2009, 1♀, 1♂, I. Melnik

( ZISP). Japan: Hokkaido Island: Hidaka Mts., above Pyo Tan , Riv. Satsunai, 400 m ,

12‒14.VIII 1996, 7♀, 6♂, L. Masner ( CNCI); Sapporo, Jozankei, 350 m , VIII 1989,

1♀, K. Maeto & M. Sharkey ( CNCI). Honshu Island: Tokyo, Inagishi , 28.VII 1980 ,

3♀, 1♂, C. Yoshimoto ( CNCI); Tochigi Pref., Hikinuma, Shiobara , 21.VIII, 2.IX ,

20.IX and 21.IX 1985, 1♀, 4♂, K. Takahashi & T. Truck ( CNCI); Aichi Pref. ,

Narai, Toyota, 15–22.VII, 30.VII–7.VIII, 8–17.VIII, 30.VIII–5.IX, 13–19.IX and

6–12.IX 1990, 18♀, 1♂, K. Yamagishi ( CNCI); Aichi Pref., Douzuki, Obara , 15 –

22.VII, 23–29.VII and 6–12.IX 1990, 9♀, K. Yamagishi ( CNCI); Ibaraki Pref.,

Tsukuba, NIAES, 8‒15.VII, 26. VI –10.VII, 14–25.VII, X 1989 and Tsukuba, 800

m, 25–31.VII, 18.IX–2.X 1989 and Tsukuba, Expo Site, 5–11.IX 1989, 14♀, M.

Sharkey ( CNCI); Ibaraki Pref., Tsuchiura, 24–31.VII, 1–8.VIII, 29.VIII–6.IX, 11–

19.IX, 19.IX–2.X, 27.IX–3.X, 2–16.X, 16–27.X 1989, 70♀, 7♂, M. Sharkey ( CNCI);

Aomori Pref., Towadako, Yakeyama nr. Tsuta riv. 250 m, 40ᵒ35′N, 140ᵒ59′E , 22–

23.VIII 1996, 3♀, 1♂, L. Masner ( CNCI); Iwate Pref., Iwaizumi, Hitsurori , 770 m ,

11–17.VIII 1991, 2♀, A. Smetana ( CNCI). Shikoku Island, Ehime Pref., Ishizuchi

Mt. National Park, 11–17.VIII 1980, 1♀, S. & J. Pek ( CNCI). Kyushu Island:

Fukuoka Pref., Kitakyushu , 12–20.V 1984, 1♂, V . Sugonjaev ( ZISP) ; Fukuoka

Pref., Mt. Tachibana, 15–21.VII 1979, 22–28.VII 1979, 11–17.VIII 1991, 17.VIII

Figs 10–16. Spilomicrus spp. 10‒15 ‒ S. bicarinatus sp. n.; 16 ‒ S. nottoni ; 10‒12, 15 ‒

female; 14, 16 – male; 10, 13 – mesosoma, dorsal view; 11 – habitus, lateral view; 12 ‒ head,

dorsal view; 15 ‒ face. Scale bar: 11 ‒ 1.0 mm; 14, 16 – 500 μm; 10, 12, 13, 15 – 200 μm.

1992, 19♀, K. Yamagishi ( CNCI). South Korea: Mt. Sudo , 600 m, 24.VIII 1990, and

Mt. Sudo-San, 400 m, 23.VIII 1990, 2♂, K. Yamagishi ( CNCI); Jirisan, Hamyang-

gun, Macheon-myon, Samjeon-li, 700 m, 35ᵒ20.55′N, 127ᵒ38.21′E, 15.IX– 13.X 2002

and 24.VIII–15.IX 2003, 3♂, P. Tripotin ( CNCI); Chungbuk Yeongdong-gun,

Sangchon-myon, Mulhan valley, Gojadong, 4.VIII–24.IX 2002, 3♀, P. Tripotin

( CNCI).

DESCRIPTION. Female (holotype). Body length 2.5 mm. Fore wing length 2.0

mm. Antenna length 2.5 mm. Body mainly black; palpi yellow; tegulae, legs and

A1–A7 yellowish brown; mandibles, A8–A13 dark brown.

Head in dorsal view as wide as long, narrower than width of mesosoma (26:28),

in lateral view higher than long (25:21). Face, frons, genae and vertex with scattered setigerous punctures and long setae. Face and frons above base toruli smooth. Tentorial pits distinct, very small. Malar sulcus absent. Clypeus circular, as high as wide, weakly convex. Mandibles long, overlapping, bidentate, upper tooth shorter than lower. Pleurostoma distance 1.6 times shorter than width of head. Eye oval

(12:10), their height 3 times shorter than height of head, with a few long setae.

Malar space as long as height of eye. Ocelli oval, triangle, LOL 1.5 times longer than diameter of anterior ocellus (Fig. 12). POL shorter than OOL (10:14). Occipital flange narrow and smooth. Postgena cushion dense.

Antannae. A1 cylindrical, slightly curved, covered with fine coriaceous sculptured and numerous long setae; its apical rim with two projected lamellae overlapping base of A2. A2 compressed, in lateral view elongate (9: 6), subrectangular in dorsal view tapering at base. Antenna with abrupt 6-segmented clava. A8–A13 with MGS

brush and flattened on ventral side. In lateral view, connection between A7–A13

located dorsally (Fig. 11). A13 without ventral pit. Ratios of length to width of A1–

A 13 in dorsal view: A1 28:6; A2 7:5; A3 7:4.5; A4 5:4.5; A5 4:4.5; A6 5:5; A7

5:5.5; A8 6:7.5; A9 6:8.5; A10 6:8.5; A11 6:8.5; A12 6:7.5; A13 8:6.5.

Mososoma in lateral view longer than high (37:23); in dorsal view, longer than wide (37:25). Neck bare, with deep longitudinal grooves. Pronotal cervical area pubescent, pronotal cushion dense (Figs 10, 12). Side of pronotum smooth. Anterior incision of mesopleuron without setae inside it, small and deep. Propleuron smooth,

with short silvery pilosity. Mesopleuron smooth, shining and bare, with one longitudinal keel under tegula; sternaulus absent. Ventral side of mesopleuron pubescent with short pale setae. Acetabular carina sharp, prominent, no shifted posteriorly or anteriorly in its medial part; postacetabular sulcus absent. Mesodiscriment present but unvisibl under pubescence. Mesopleural epicoxal carina present only laterally.

Mesopleural epicoxal sulcus and carina on ventral side not developed. Mesonotum wider than long (35:33), with a few long setae. Notauli and humeral sulcus absent.

Scutellum with two large circular anterior scutellar pits, broad and long lateral scutellar pits and numerous small posterior scutellar pits (Figs 10, 13). Axillar depression poorly pubescent and smooth. Metascutellum pubescent and coarsely sculptured, with weakly projecting median and one lateral keels, which connected by transverse keel. Propodeum entirely coarsely rugose, with pale pilosity, transverse

(28:13), with posterior margin in dorsal view arcuate (Fig. 13). Median propodeal keel projecting into not high spine directed upward. All legs with delimited trochantelli, slender.

Fore wings clear, longer than wide (14: 5). Marginal vein twice longer than wide. Stigmal vein shorter than width of marginal vein. Submarginal vein tubular,

sclerotized. Costa and basal veins weakly sclerotized.

Metasoma. Petiole cylindrical, elongate (15:11), completely with not deep longitudinal grooves, poorly pubescent dorsaly and more denselly ventrally. T2

with a few short sparse setae and fine micropunctures medially at distal margin.

T3‒T5 with fine punctuation and row long erect setae. T5 laterally weakly expanded without additional setae. T6 small, T7 pointed. S2 smooth with dense white cushion at anterior margin; its posterior surface and surface of S3‒S5 with scattered setae.

Apical sternite covered with fine punctuation and numerous setae.

VARIATION. Body length 2.0– 2.9 mm. Whole body black or abdomen and propodeum reddish brown. A3 equal to weakly longer than A2. Width of A9–A12

equal each other or A8–A11 subequal or A9–A11 such only. A4–A6 elongated to weakly transverse. Petiole as long as wide to twice longer than wide.

MALE. Body length 1.3 – 2.7 mm. Similar to female, but differs mainly in antennal structures and petiole proportions. Eyeas high as half of head high. Antenna yellowish brown, scape and pedicel similar to female. A4 and A5 broadened apically, with straight keels extending from base to apex of segments. Ratios of length to width of A1–A 13 in dorsal view: A1 25:6; A2 8:5; A3 11:5.5; A4 9:6; A5

8:7; A6 7:6; A7 7:6; A8 7:6; A9 7:6; A10 7:6; A11 7:6; A12 6:6; A13 10:5.5.

A3‒A13 of many specimens more elongate. Length of A3=A4 to A3 distinctly longer; A4=A5 to A4 distinctly longer. Petiole elongated (11:5). Apical sternit covered with coarse punctuation.

DIAGNOSIS. This new species differs from the all Palaearctic species by the combination of these features: length of body 1.3–2.9 mm, notauli and maral sulcus absent, tentorial pits very small, antenna of female with abrupt 6-segmented clava,

male A4 and A5 with keels, posterior margin of propodeum deeply arcuate and petiple short. S. bicarinatus is most similar to S. integer Thomson, 1858 from which it can be distinguished by 6-segmented abrupt clava (5-segmented in S. integer); malar sulcus or trace of it absent (present in S. integer); tentorial pits present (absent in S.

integer); male A4 and A5 with keels, subequal (Fig. 14) (only A4 with keel in S.

integer, A4 distinctly longer than A5).

DISTRIBUTION. Russia (Primorskiy Terr., Kunashir), Japan (Hokkaido, Honshu, Kyushu, Shikoku), South Korea.

ETYMOLOGY. The name refers to the well developed two keels on male A4

and A5.