Paramesius primorus Chemyreva et Kolyada, 2018

Chemyreva, Vasilisa G. & Kolyada, Victor A., 2018, Review of the genus Paramesius Westwood, 1832 (Hymenoptera: Diapriidae, Spilomicrini) from Russia, with description of four new species, Zootaxa 4524 (4), pp. 453-472 : 464-466

Paramesius primorus Chemyreva et Kolyada , sp. nov.

( Figs 11 , 14–17, 34, 36, 47, 52)

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Diagnosis. Paramesius primorus sp. nov. is closed to P. rufipes and P. crassicornis but differs from it by following features: notauli full (shallow anteriorly in P. rufipes ; full in P. crassicornis ); mesoscutal suprahumeral sulcus deep laterally and shallow near notauli (shallow laterally to absent in P. rufipes and P. crassicornis ); male occipital flange foveolate ( Fig. 11 ) (smooth ( Fig. 9 ) in P. rufipes and P. crassicornis ).

Description. Holotype. Female. Body length 3.0 mm; fore wing length 2.4 mm; antenna length 1.8 mm.

Colour. Body black; leg, including coxae, palpi, A1–A9 pale brown; A10, mandibles and tegula brown; A11–A13 dark brown.

Head in dorsal view as wide as long, with scattered long setae. Occipital flange narrow, distinctly foveolate. Postgenal cushion small, with dense and thin pilosity. Head in lateral view higher than long (20:18), subglobular. Eye height twice longer than malar space. Antennal shelf with distinct pressure between toruli. Face smooth and pubescent. Malar sulcus absent. Clypeus convex, semicircular, wider than high (5:4). Epistomal sulcus shallow. Tentorial pits small. Mandibles bidentate, teeth equal.

Antenna with slender, non-abrupt clava. In lateral view, A10–A13 separated by deep gaps and connection between A10–A13 situated dorsally ( Fig. 34 ). Ratios of length to width of antennomeres in dorsal view: A1 21.0:3.5; A2 5.5:2.5; A3 4.5:2.0; A4 4.5:2.0; A5 4.0:2.0; A6 4.0:2.0; A7 4.0:2.5; A8 4.0:3.0; A9 4.0:3.0; A10 4.0:3.2; A11 3.5:3.5; A12 4.0:3.5; A13 9.5:3.5.

Mesosoma in dorsal view longer than wide (30:19); in lateral view distinctly longer than high (30:20). Neck with subtle pubescence and deep longitudinal grooves. Pronotal cervical area with long and short setae around neck and setigerous punctures above, bare lateraly. Pronotal cushion dense. Side of pronotum with row of foveae along posterior margin and with row of setae behind the foveae throughout. Mesoscutum slightly convex, with a few scattered semi-decumbent setae. Notauli complete throughout and well impressed, posteriorly weakly convergent; smallest distance between notauli shorter than between notauli and humeral sulcus (3:4). Humeral sulcus deep; mesoscutal suprahumeral sulcus deep laterally and shallow near notaulus. Anterior scutellar pit deep and large, with two septum. Two lateral scutellar pits well impressed. Posterior scutellar pits numerous and deep; lateral rim sculptured. Mesopleuron with deep sulcus under tegula and with complete sternaulus. Area below sternaulus with longitudinal rugosity. Mesopleuron ventraly with irregular sculpture near coxa and smooth medialy. Metascutellum narrow, pubescent, with low medial keel and one low lateral keel. Propodeum distinctly transverse (13:9); lateral area pubescent, dorsal area bare. Median propodeal keel projecting into spine directed backward. Propodeal spiracle cap small, amber color.

Wing. Forewing without basal, medial and Rs veins. Ratio of length to width of marginal vein 6:1. Length of stigmal vein 3.0 times longer than width of marginal vein. Legs normal with tarsomeres elongated, claws curved.

Metasoma. Petiole in dorsal view cylindrical, elongate (16:9) and bare, with several longitudinal ridges. Petiole in lateral view straight with long dense light and straight pubescence ventrally. T2 notch extremely tiny (Figs 14, 16); T3–T4 narrow and bare; apex of female metasoma sharply conical, T5–T6 compressed laterally with numerous erect setae; T5 longer than T3–T4 together, as long as T6. S2 with numerous erect setae; S3–S5 narrow and bare; S6 large, 3.0 times longer than S3–S5 together, with long erect hair.

Variation. Body length 1.7–3.0 mm. Notauli sculptured at bottom to smooth. Wings 0.66–0.85 times as long as body. A1–A7 yellow to brown. Occipital flange deeply foveolate throughout to weakly sculptured dorsomedially. Petiole 0.29–0.36 times as long as T2. Anterior scutellar pit with 1–4 carinae.

Male. Body length 1.8–3.1 mm. Similar to female, but differs mainly in features of antennal structure and petiole. Antenna long, thin, distinctly longer than entire body (92:60); A3–A13 with relatively dense, semidecumbent setae, as long as or shorter than maximal width of antennomeres; A1–A13 yellow to brown; A2–A4 same color with A1 or A1 paler. A4 with sharp keel which extending to 0.36–0.48 of A4 length. Length to width of antennal segments: A1 16.0:3.0; A2 5.5:3.0; A3 5.0:2.0; A4 16.0:3.0; A5 16.5:2.0; A6 16.5:2.0; A7 17.0:2.0; A8 17.0:2.0; A9 17.0:2.0; A10 16.0:1.8; A11 15.0:1.5; A12 14.0:1.5; A13 14.0:2.0. Length of A1 equal to A4 (rare A1 weakly longer than A4) to A1 distinctly shorter than A4. Notauli sculptured at bottom to smooth. Suprahumeral sulcus full and deep to partly shallow medially near notauli. Anterior scutellar pit with 1–4 carinae. Petiole 0.37–0.50 times as long as T2.

Type material. Holotype: ♀ ( ZISP) labelled ” Russia, Primorsky Terr., Khasan Distr., 15 km S from Slavyanka , Ryazanovka , 2–3.IX.1987, S. Belokobylskij ”, ” Paramesius primorus Chem. & Kolyada, 2018 ” . Paratypes. RUSSIA: Primorsky Terr., vicinity of Novokachalinsk, Khanka Lake , 21–23.VII.1995, 8– 10.VIII.2001 and 4–7. VII.2 0 0 6, SB, 1♀, 7♂ ( ZISP) ; vicinity of Spassk-Dal’niy, 18.IX.1987, 9. VII.1 995 and 16– 24.VII.2006, SB, 1♀, 10♂ ( ZISP) ; same locality as holotype, 2–3.IX.1987, SB, 10♀, 1♂ ( ZISP) ; Khasan Distr., 25 km SW from Slavyanka , 15.VIII.2006, SB, 1♂ ( ZISP) ; Khasan Distr., Kedrovaya Pad’ Nature Reserve , 18– 15.VIII.2014, VC, 1♀, 3♂ ( ZISP) ; vicinity of Khasan , 27–30.VIII.1988, SB, 12♀ ( ZISP, NHMUK) ; peninsula Gamova, Gorshkova Bay , 16–18.VIII.1999, V. Krivokhatskiy & O. Ovchinikova, 1♂ ( ZISP) . Ussuriysk Distr., 20 km SW from Krounovka , 5.VIII.1993, SB, 1♂ ( ZISP) ; Gornotayozhnoe , 11–16.VII.2003, M. Michaylovskaya, 1♂ ( NHMUK) .

Host. Unknown.

Distribution, Russia (Primorsky Territory).

Etymology. This species is named after the type-locality, Primorskiy Territory.

Figures

FIGURES 8–13. P. dolosus, lectotype, ♀ (8), P. crassicornis (9–10, 12–13) and P. primorus sp. nov. (11). 9, 11, head of male, dorsal view; 10, mesosoma and petiole of female, dorsal view; 12, 13, mesosoma of female, lateral view. Scale bar: 200 µm (9–12); 500 µm (13); 1.0 mm (8).

FIGURES 32–42. 32, Apexes of female antennae in lateral (32–35, 38–41) and dorsal (36, 37, 42) views. 32, P. brachypterus; 33, P. ocampus sp. nov.; 34, 36, P. primorus sp. nov.; 35, P. belytoides; 37, 39, P. crassicornis; 38, P. rufipes; 40, 42, P. janmaceki sp. nov.; 41, P. spiracularis sp. nov. Scale bar 100 µm.