Chorebus (Stiphrocera) minuitus, Papp, 2013

Papp, J., 2013, Dacnusines From Korea: New And Known Species (Hymenoptera: Braconidae: Alysiinae: Dacnusini), Acta Zoologica Academiae Scientiarum Hungaricae 59 (3), pp. 229-265 : 250-252

Chorebus (Stiphrocera) minuitus sp. n.

(Figs 69–80)

Type material (2 f) – Female holotype: Korea, Chungbuk, Checheon Pongyang Pa- kdaljae, 23 May 1993, leg. D.-S. Ku. 1 f paratype : Korea, Kyongi Suwon, Mt. Yogi , 11 May 1994, leg. D.-S. Ku. – Holotype and paratype are in good condition: (1) glued on card points by their right mesopleuron, (2) hind tergites somewhat shivelled (holotype). Holotype and paratype are deposited in the Hungarian Natural History Museum , Budapest, Hym. Typ. No. 12132 (holotype) and 12133 (paratype) .

Etymology – The new species received the name ”minuitus” (subtle) owing to the minute differences from its most morphologically similar species.

Description of the female holotype – Body length 2.7 mm. Antenna about one-fourth longer than body and with 31 antennomeres. First flagellomere four times and penultimate flagellomere twice as long as broad. – Head in dorsal view less transverse (Fig. 69), 1.7 times as broad as long, eye 1.5 times as long as temple, temple clearly rounded, occiput weakly excavated. Ocelli small, elliptic, forming an equilateral triangle; OOL twice as long as POL. Eye in lateral view 1.6 times as high as wide, temple beyond eye as wide as eye (Fig. 70, see arrows). Inner margin of eyes converging ventrally, face almost twice as wide as high (Fig. 71, see arrows). Mandible: first (or upper) and second teeth spiky, third and fourth denticules blunt (Fig. 72). Head polished.

Mesosoma in lateral view 1.6 times as long as high, polished. Pronope present. Notaulix weakly distinct, median lobe of mesoscutum (i.e. between pair of weak notaulices) hair-punctured and hairy, otherwise polished; mesoscutal midpit linearform, fairly deep and long (cf. Fig. 42). Precoxal sulcus linearform, bent and smooth (Fig. 73). Propodeum and metapleuron densely rugulose and pubescent. – Hind femur 4.1 times as long as distally (Fig. 74). Hind basitarsus as long as tarsomeres 2–4 combined.

Fore wing longer than body. Pterostigma (Fig. 78) eight times as long as wide, issuing r ”oblique” and long: 1.6 times as long as width of pterostigma; 3–SR + SR1 approaching tip of wing, pterostigma somewhat longer than 1– R 1 (50:45). First subdiscal cell closed distally (cf. Fig. 44).

First tergite (Fig. 79) slightly narrowing posteriorly, twice as long as broad behind, pair of spiracles faintly protruding and distinctly before middle of tergite, tergite broadest between spiracles: 1.6 times as long as broad here; pair of keels meeting anteriorly; tergite striated with anastomoses, interstriation uneven (Fig. 79). Tergites 2–3 as long as first tergite, second tergite somewhat longer than third tergite, together with further tergites polished. Hypopygium less pointed, ovipositor sheath short: as long as hind tarsomeres 3–4 combined (Fig. 75).

Scape, pedicel and first flagellomere brownish yellow, flagellum brown. Head, mesosoma and first tergite black (head with very faint dark brown tint). Metasoma brown. Oral organs (palpi etc.) straw yellow. Tegula brown, parategula (distally from tegula) light brown. Legs light brownish yellow, hind tarsus feebly fumous. Wings hyaline, pterostigma and veins opaque light brown.

Description of the female paratype – Similar to the female holotype. Body length 2 mm. Antenna with 32 antennomeres. Head in dorsal view somewhat more transverse, 1.8 times as broad as long. Notaulix very weak (i.e. hardly distinct). Precoxal suture less linearform and less long, subrugulose (Fig. 76). Hind femur 3.8 times as long as broad (Fig. 77). Figs 76–86. Chorebus (Stiphrocera) species. 76–80: Ch. (S.) minuitus sp. n., 76–77 and 80: female paratype, 78–79: female holotype: 76 = mesopleuron, 77 = hind femur, 78 = distal part of right fore wing, 79 = tergites 1–3, 80 = first tergite. 81–85: Ch. (S.) panilus sp. n., female holotype: 81 = head in dorsal view, 82 = head in lateral view, 83 = head in frontal view, 84 = mandible, 85 = mesopleuron. 86: Ch. (S.) albimarginis Griffiths , female: head in frontal view.

Fore wing: r 1.7 times as long as width of pterostigma. First tergite somewhat broader, 1.6 times as long as broad behind, pair of spiracles less protruding (Fig. 80).

Male and host unknown.

Distribution: Korea.

Taxonomic position – The new species, Chorebus (Stiphrocera) minuitus , is nearest to Ch. (S.) albimarginis Griffiths ( Griffiths 1967: 860) based on their bare first tergite, less hairy mesoscutum, loose tuft hairs of hind coxa (Fig. 35) and yellow leg; the two species are distinguished as follows:

1 (2) Head in dorsal view transverse, 1.9 times as broad as long, eye as long as temple (Fig. 27). Inner margin of eyes parallel (Fig. 86). First tergite par- allel-sided, 2.7–2.8 times as long as broad posteriorly, pair of spiracles not protruding and near to middle of tergite, striated (Fig. 36). Hind femur 5–5.5 times as long as broad (Fig. 34). Tergites 2(–3) yellow to brownish yellow, remaining tergites dark brown to blackish. f: 1.9–2.1 mm. – Germany, Hungary Chorebus (Stiphrocera) albimarginis Griffiths, 1967

2 (1) Head in dorsal view slightly less transverse, 1.7 times as broad as long,

eye 1.5 times as long as temple (Fig. 69). Inner margin of eyes converging ventrally (Fig. 71). First tergite broadening up to pair of spiracles,

beyond then just narrowing, 1.6–2.0 times as long as broad posteriorly,

pair of spiracles faintly protruding and before middle of tergite, finely striated (Figs 79, 80). Hind femur 3.8–4.1 times as long as broad (Figs

74, 77). Metasoma beyond first tergite brown. f: 2–2.7 mm. – Korea

Chorebus (Stiphrocera) minuitus sp. n.