Bracon (Glabrobracon) dersimensis Beyarslan

Beyarslan, Ahmet & Erdoğan, Özlem Çetin, 2012, The Braconinae (Hymenoptera: Braconidae) of Turkey, with new locality records and descriptions of two new species of Bracon Fabricius, 1804, Zootaxa 3343, pp. 45-56 : 47-50

Bracon (Glabrobracon) dersimensis Beyarslan sp. n. ( Figs 9–16)

Description. Female (holotype) ( Fig. 9). Length of body 3.5 mm, antennae 3.0 mm, fore wing 3.5 mm, hind wing 2.9 mm, hind leg 3.8 mm, mesosoma 1.2 mm, metasoma 2.0 mm, ovipositor 4.0 mm.

Head. Transverse, ratios of width: length: height of head = 10: 5: 11 ( Fig. 10 ). Antenna with 27 segments. First flagellomere 1.8 times as long as its width and as long as second flagellomere, all flagellomeres longer than its width and penultimate flagellomere 2 times as long as its width ( Fig. 11 ). Width of the hypoclypeal depression 0.44 times of longitudinal diameter of eye, almost as long as lengthof malar space and 1.7 times as long as basal width of mandible; longitudinal diameter of eye 1.4 times longer than its transverse diameter; ratios of height of clypeus: inter-tentorial distance: tenterio-ocular distance = 3: 6: 10; length of maxillary palp 0.7 times the height of head; width of face 1.5 times its height, face smooth and glabrous; ratios of longitudinal diameter of eye: width of face: width of head= 25: 26: 50; vertex and frons smooth and glabrous with some white setae; transverse diameter of eye almost as long as temple in dorsal view; ratios of OOL: OD:POL = 11: 3: 6; mandible and temple smooth, shiny; length of malar space 1.4 times as long as basal width of mandible and 0.45 times longitudinal diameter of eye.

Mesosoma ( Fig. 12 ). Mesosoma approximately 1.4 times longer than height; pronotum and propleuron smooth and glabrous; mesoscutum smooth, glabrous; notauli distinct and with sparse white setae; scutellar sulcus and scutellum smooth glabrous; flange of metapleuron almost indistinct; metanotum smooth, shiny; surface of propodeum smooth and glabrous.

Fore wing ( Fig.13 ). Pterostigma triangular, length of pterostigma 3.3 times its maximal width; vein 1-SR+M slightly curved; vein cu-a interstitial; ratio of r: 3-SR: SR1 = 13: 30: 51; CUlb short, 3-CU1 0.8 times as long as m-cu and 2 times as long as CU1b; ratios of 2- SR: 3-SR: r-m: 2-M: 2-SR+M= 20: 29: 11: 46: 4.

Hind wing( Fig.14 ). Ratios of cu-a: 1-M: 1r-m: 2-SC+R: SC+R1: M+CU= 10: 53: 8: 5: 20: 20; apex of C+SC+R with 3 especially thickened bristle.

Legs ( Fig. 15 ). Hind coxa smooth and shiny; femur weakly compressed; ratios of femur: tibia: basitarsus: tarsus of hind leg = 50: 68: 27: 68; length of femur, tibia and basitarsus of hind leg 3.8, 7.5 and 5.4 times their maximum width, respectively; outer and inner hind tibial spurs 0.37 and 0.25 times hind basitarsus, respectively. Tibia and tarsus densely setose.

Metasoma ( Fig. 16 ). Length of first tergite 0.7 times its apical width and smooth, spiracles on first metasomal tergite projecting; suture between 2nd and 3rd metasomal tergites deep and sinuate; medial length of second tergite 0.4 times as long as its apical width and 1.4 times as long as medial length of third tergite; all tergites smooth and glabrous.

Colour. Black. Metasomal sternite yellow-brown. Wing membrane dark, pterostigma and and veins black.

Male: Unknown.

Host: Unknown.

Material examined. Holotype: Female—Tunceli, Pülümür, Hiver, in an area with Salix sp., Populus sp., Astragalus sp. and herbaceous plants (39° 31' 20 N, 39° 51' 59 E) 1830 m a.s.l., 27.08.2008, leg. A. Beyarslan.

Diagnosis. The new species is distinguished from the congeneric Bracon (Glabrobracon) pineti Thomson,1892 , by the synopsis of the following characters:

1(2) Second metasomal tergite longer than third metasomal tergite (10: 7). Marginal cell not reduced, access apex of fore wing. Length of first tergite as long as its apical width; length of ovipositor sheath almost as long as metasoma........................................................................... Bracon (Glabrobracon) dersimensis Beyarslan sp. n.

2(1) Second metasomal tergite as long as third metasomal tergite. Marginal cell reduced, not reaching to the apex of fore wing. Length of first tergite 0.5 times its apical width; length of ovipositor sheath 0.4 times metasoma..................................................................................................... B. (G.) pineti Thomson, 1892

Etymology. The specific name is from the type locality Tunceli (former name Dersim), Turkish eastern Anatolia region.

Figures

FIGURES 10 – 16. (female): 10 — head in frontal view; 11 — antenna; 12 — mesosoma in lateral view; 13 — forewing; 14 — Hindwing, 15 — hind leg; 16 — metasoma. Scale: 0.5 mm (Fig 10), 1.3 mm (Fig 11), 0.37 mm (Fig 12), 0.9 mm (Fig 13, 14), 0.57 mm (Fig 15), 1.3 mm (Fig 16).