Uncobracon belokobylskii, Samartsev, 2018

Samartsev, Konstantin G., 2018, New species of the subfamily Braconinae (Hymenoptera: Braconidae) from the Russian Far East, Zootaxa 4388 (2), pp. 238-254 : 249-254

Uncobracon belokobylskii sp. nov.

( Figs 65–77 )

Type material. Holotype: female, Russia, Primorsky kray, 10 km SE Partizansk, Novitskoe , forest, glades, 3– 4.VIII.2013, S.A. Belokobylskij ( ZISP).

Etymology. The specific name is given in honor of S.A. Belokobylskij, a leading taxonomist of the family Braconidae and a noted collector.

Description. Female. Body length 2.9 mm; fore wing length 3.0 mm.

Head. Width of head (dorsal view) 2.0× its median length. Head rounded behind eyes (dorsal view). Transverse diameter of eye (dorsal view) 1.8× longer than temple. Eyes with dense short setae. OOL 2.3× Od; POL 1.0× Od; OOL 2.3× POL. Frons with very weak medio-longitudinal impression. Longitudinal diameter of eye in lateral view 1.5× larger than its transverse diameter. Transverse diameter of eye (lateral view) 2.0× longer than minimum width of temple; hind margins of eye and temple weakly broadened dorsally. Face width 1.8× combined height with face and clypeus, 2.1× larger than width of hypoclypeal depression. Longitudinal diameter of eye 2.7× longer than malar space (front view); malar space 0.85× as long as base of mandible. Malar suture deep. Width of hypoclypeal depression 1.4× larger than distance from depression to eye. Clypeus prominent, with strongly protruding ventral rim, height of clypeus 0.3× width of hypoclypeal depression.

Antenna. First flagellomere 1.7× longer than its apical width, as long as second flagellomere. Middle flagellomeres 1.5× longer than their width.

Mesosoma 1.3× longer than its maximum height. Transverse oblique pronotal sulcus deep and carinate. Mesoscutum 1.2× as wide as its median length (dorsal view). Notauli deep anteriorly, weakly impressed posteriorly, united just before scutellar sulcus. Median lobe of mesoscutum glabrous. Scutellar sulcus crenulate, 0.2× as long as scutellum. Mesepimeral sulcus weakly crenulate. Middle area of metanotum (dorsal view) medially elevated, with incomplete longitudinal carina. Propodeum with short branching median carina posteriorly. Metapleural sulcus crenulate.

Wings. Fore wing as long as body, 2.5× longer than its maximum width. Pterostigma 2.5× longer than broad. Vein r arising just before its middle. Vein 1-R1 1.6× longer than pterostigma. Marginal cell 7.3× longer than distance from its apex to apex of wing. Vein 3-SR 2.9× longer than vein r, 0.55× as long as vein SR1, 1.3× longer than vein 2-SR. Vein 1-M 0.8× as long as vein 1-SR+M, 1.8× longer than vein m-cu and 2.0× longer than vein cua. Vein 2-SR+M 0.2× as long as vein 2-SR, 0.4× as long as vein m-cu. Vein 1-CU1 (posterior margin of discal cell) 2.3× longer than vein cu-a. Vein cu-a almost interstitial. Vein 2-1A of hind wing absent; vein r-m weakly antefurcal.

Legs. Hind femur 3.5× longer than wide. Hind tibia 1.35× longer than hind femur, its inner spur 0.4× as long as hind basitarsus. Hind tarsus 0.9× as long as hind tibia. Fifth segment (without pretarsus) of hind tarsus 0.5× as long as hind basitarsus and as long as second segment. Claws strongly curved, with large, protruding and blunt basal lobes.

Metasoma 1.16× as long as mesosoma. Median length of first tergite (measured from petiolar tubercle) 0.8× as large as its apical width. Median area of first tergite separated by crenulate furrow, 0.6× as wide as apical width of tergite. Dorsolateral arcuate carinae incomplete, strongly curved toward apex. Second tergite without mediobasal area, with deep parallel crenulated sublateral impressions, 0.9× as long as third tergite medially. Basal width of second tergite 2.1× median length. Suture between second and third tergites deep, weakly sinuate and crenulated. Apical margins of third to sixth tergites smooth, without transverse subapical grooves. Ovipositor sheath 0.4× as long as fore wing. Apex of ovipositor with dorsal nodus and ventral serration.

Sculpture. Body mainly smooth. Propodeum medially with tree-like rugosity in posterior half. Median area of the first metasomal tergite longitudinally rugose in aterior half. Second metasomal tergite longitudinally rugose with weak granulosity, third to sixth tergites weakly coriaceous.

Colour. Body mainly black. Palpi, tegulae and most part of legs brownish-yellow. Hind tibia basally pale yellow, its apical half and hind tarsus dark brown. Wing membrane weakly darkened, pterostigma and veins brown. Male unknown.

Distribution. Russia: Primorsky kray.

Comparative diagnosis. Uncobracon belokobylskii sp. nov. is distinctly separated from other members of the genus, which differ among each other mainly by their coloration pattern. The key to the species of the genus Uncobracon is given below.

1 Second metasomal tergite longitudinally rugose, without areolate or foveate sculpture ( Fig. 77 ). Hind tibia pale yellow in basal half ( Fig. 65 ). Face width 1.8× combined height with face and clypeus ( Fig. 68 ). Metapleural sulcus crenulate ( Fig. 73 ).............................................................................. Uncobracon belokobylskii sp. nov.

- Second metasomal tergite with coarse areolate-rugose or foveate sculpture ( Figs 81, 84, 87, 88 ). Hind tibia evenly black ( Figs 78, 85 ), sometimes with small reddish-brown patch basally ( Fig. 82 ). Face width 1.2–1.6× combined height with face and clypeus (79, 83, 86). Metapleural sulcus smooth............................................................. 2

2 Hind femur rusty ( Fig. 78 ). Both mesosoma and metasoma mainly reddish-yellow (only propodeum sometimes with brownish patch). Face width 1.2–1.3× combined height with face and clypeus ( Fig. 79 )................. Uncobracon pappi (Tobias)

- Hind femur black ( Figs 82, 85 ). Mesosoma and/or metasoma mainly black. Face width 1.35–1.55× combined height with face and clypeus ( Figs 83, 86 )............................................................................... 3

3 Mesosoma black, metasoma reddish-brown with brown pattern ( Fig. 82 ). Face width 1.35–1.45× combined height with face and clypeus ( Fig. 83 )......................................................... Uncobracon apoderi (Watanabe)

- Prothorax and mesothorax rusty, metathorax, propodeum and metasoma completely black ( Fig. 85 ). Face width 1.55× combined height with face and clypeus ( Fig. 86 )...................................... Uncobracon tricoloratus (Tobias)

Figures

FIGURES 65–72. Uncobracon belokobylskii sp. nov. (holotype, ZISP), female. 65. Habitus, dorsal view. 66. Habitus, lateral view.67. Head, dorsal view. 68. Head, front view. 69. Head, lateral view. 70. Head, ventrolateral view. 71. Propodeum, dorsal view.72. Apex of ovipositor.

FIGURES 73–77. Uncobracon belokobylskii sp. nov. (holotype, ZISP), female. 73. Mesosoma, lateral view. 74. First metasomal tergite, dorsal view. 75. Hind tarsus, front view.76. Mesosoma,dorsal view.77. Metasoma, dorsal view.

FIGURES 78–88. Uncobracon pappi (Tobias) (78, 79—holotype, 80, 81—paratype; ZISP), U. apoderi (Watanabe) (82, 84— holotype of Bracon dahuricus var. maculatus Shestakov, jun. syn.; 83—paralectotype of Bracon dahuricus Telenga, jun. syn.; NHRS) and U. tricoloratus (Tobias) (85, 86—holotype; 87, 88—paratype; ZISP), female. 78, 82, 85. Habitus, lateral view. 79, 83, 86. Head,front view.80.First metasomaltergite, dorsal view.81,88.Metasoma,dorsal view.84, 87. First,second and third metasomal tergites, dorsolateral view.