Chorebus (Stiphrocera) detorqus, Papp, 2005

Papp, J., 2005, Braconidae (Hymenoptera) From Mongolia, Xvi. Subfamilies Gnamptodontinae, Brachistinae, Euphorinae, Alysiinae, Acta Zoologica Academiae Scientiarum Hungaricae 51 (3), pp. 221-251 : 234-236

Chorebus (Stiphrocera) detorqus sp. n. f

( Figs 27–35 , 39 )

Material examined (2 ff). – Female holotype + 1 female paratype: Mongolia, Chovd aimak, 3 km N von Somon Uenč, im Tal Uenč gol, 1450 m, 2–3 Juli 1966, leg. Z. KASZAB (loc. no. 614) .

Holotype and paratype are deposited in the Hungarian Natural History Museum ( Department of Zoology ), Budapest, Hym. Typ. Nos 10722 (holotype) and 10723 (paratype) .

Holotype is in good condition: right antenna apically damaged (with 26 antennomeres), left hind wing medially somewhat creased. Paratype in fairly good condition: both antennae proximally damaged (with six antennomeres).

Etymology. – The species name “detorqus ” indicates its close relationship to Ch. geminus (detorqus = descendant).

Description of the female holotype. – Body 2.8 mm long. Left antenna as long as body and with 31 antennomeres. First flagellomere twice, middle ones 1.8 times and penultimate flagellomere twice as long as broad. – Head in dorsal view ( Fig. 27 ) transverse, 1.76 times as broad as long, eye slightly longer than temple, temple rounded; head between temples indistinctly broader than between eyes. Ocelli small, elliptic, far from each other, OOL twice as long as POL. Head 1.5 times as broad as mesoscutum between tegulae. Eye in lateral view 1.75 times as high as wide, temple beyond eye just less wide than eye ( Fig. 28 , see arrows). Inner margin of eye parallel, face 1.5 times as wide as high ( Fig. 29 ). Mandible as long as broad between upper and lower teeth, first tooth large, second tooth less spiky ( Fig. 30 ). Tentorial pit not reaching eye. Occiput almost bare: only with a few hairs, temple with more hairs. Head polished.

Mesosoma in lateral view 1.4 times as long as high, polished. Pronotum with disperse hairs, its fore margin with a row of hairs, pronope present. Precoxal suture wide, sinuate and crenulated ( Fig. 31 ). Mesoscutum medially less densely hairy. Propodeum hairless, rugulose; metapleuron fairly pubescent with less distinct rosette. – Hind femur 3.6 times as long as broad distally ( Fig. 32 ). Hind tibia and tarsus equal in length.

Fore wing as long as body. Pterostigma ( Fig. 33 ) cuneiform, eight times as long as wide, issuing r near from its base, r almost twice as long as width of pterostigma; 1–R1 0.85 times as long as pterostigma; 3–SR + SR1 bent, SR1 ending near to tip of wing. Subdiscal cell open distally, i.e. distal half of 2–1A effaced ( Fig. 34 ).

First tergite ( Fig. 35 ) evenly broadening posteriorly, 1.3 times as long as broad behind, pair of spiracles very small and at middle of tergite, rugo-rugulose, bald. Further tergites polished. Tergites 2 and 3 of equal length, border between them indistinct. Ovipositor sheath very short, concealed.

Head, mesosoma and first tergite black, metasoma black with faint dark brown tint. Scape, pedicel and flagellomeres 1–2 brown, rest of flagellum blackish. Mandible dark rusty, palpi pale yellow. Tegula blackish, parategula brown. Legs brownish yellow. Hind tibia distally faintly infuscate; hind and middle tarsi infuscate. Wings hyaline, pterostigma brown, veins light brown.

Description of the female paratype. – Similar to the female holotype. Body 2.6 mm long. Head in dorsal view 1.8 times as broad as long, temple slightly more swollen ( Fig. 39 ). Pterostigma 6.6 times as long as wide, 1–R1 0.75 times as long as pterostigma. Tergites 2–3 dark brown.

(S.) geminus (TOBIAS) : 36 = tergites 1–3, 37 = distal part of right fore wing, 38 = mandible

Male and host unknown.

Distribution: Mongolia.

The new species, Chorebus (Stiphrocera) detorqus , is nearest to Ch. (S.) geminus (TOBIAS) considering their hairless propodeum and strongly broadening mandible; the two species are distinguished by the following features:

1 (2) First tergite parallel-sided beyond pair of spiracles, spiracles more or less projecting ( Fig. 36 ). Pterostigma parallel-sided ( Fig. 37 ). Upper tooth of mandible more pointed ( Fig. 38 ). Antenna with 32 (m) and 39 (f) antennomeres. Tergites 2–3 reddish brown. f: 2.3–2.6 mm, m: 2.3–2.4 mm. – Hungary, Ukraine, Russia (European part), Azerbaidjan Ch. (S.) geminus ( TOBIAS, 1962)

2 (1) First tergite evenly broadening posteriorly, pair of spiracles not projecting ( Fig. 35 ). Pterostigma cuneiform ( Fig. 33 ). Upper tooth of mandible less pointed ( Fig. 30 ). Antenna with 31 (f) and 32 (m) antennomeres. Tergites 2–3 dark rusty. f: 2.6–2.8 mm. – Mongolia Ch. (S.) detorqus sp. n.

The new species stands near to Ch. (S.) lissopleuris TOBIAS considering their expanded mandible, posteriorly broadening first tergite and less hairy mesoscutum; the two species are differing from each other by the features as follows:

1 (2) Inner margin of eyes converging ventrally, i.e. face one-third wider than high ( Fig. 40 ). Temple in dorsal view somewhat swollen ( Fig. 41 ). Antenna with 23–25 (f) antennomeres. First tergite somewhat more broadening posteriorly, i.e. 1.5 times as long as broad behind ( Fig. 42 ). Metasoma testaceous, first tergite blackish brown, last tergites darkening. f: 1.3–1.8 mm. – Asiatic Russia (Far East Maritime Territory), Mongolia

Ch. (S.) lissopleuris TOBIAS, 1998

2 (1) Inner margin of eyes parallel, i. e. face 1.5 times as wide as high ( Fig. 29 ). Temple in dorsal view not swollen ( Fig. 27 ). Antenna with 31 (f) and 32 (m) antennomeres. First tergite somewhat less broadening posteriorly, i.e. 1.25–1.3 times as long as broad behind ( Fig. 35 ). Metasoma blackish, tergites 2–3 dark rusty. f: 2.6–2.8 mm. – Mongolia Ch. (S.) detorqus sp. n.

Figures

Figs 27–38. 27–35.Chorebus (Stiphrocera) detorqus sp. n.: 27 = head of the holotype in dorsal view, 28 = head of the holotype in lateral view, 29 = head of the holotype in frontal view, 30 = mandible, 31 = mesopleuron with precoxal suture, 32 = hind femur, 33 = distal part of right fore wing, 34 = subdiscal cell of fore wing, 35 = tergites 1–3 with detail of the sculpture of first tergite. – 36–38. Ch.

Figs 39–52. 39. Chorebus (Stiphrocera) detorqus sp. n.: head in dorsal view. – 40–42. Ch. (S.) lissopleuris TOBIAS: 40 = head in frontal view, 41 = head in dorsal view, 42 = first tergite. – 43–49. Ch. (S.) monfreya sp. n.: 43 = head in dorsal view, 44 = head in latertal view, 45 = mandible, 46 = propodeum, 47 = distal part of right fore wing, 48 = subdiscal cell of fore wing, 49 = tergites 1–3 with detail of the sculpture of first tergite. – 50–52. Ch. (S.) freya (Nixon): 50 = first tergite with detail of