Closterocerus scapiatus Singh & Khan, 1996

Jamali, Mohd Majid & Zeya, Shahid Bin, 2021, Review of Indian Closterocerus (Hymenoptera: Chalcidoidea: Eulophidae), with description of two new species, Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 61 (1), pp. 231-241 : 236-237

Closterocerus scapiatus Singh & Khan, 1996

( Figs 5–6 )

Closterocerus scapiatus Singh & Khan, 1996: 158 , female. Holotype: ♀, India, Uttarakhand, Pantnagar, University Campus (ZSIC), not examined.

Closterocerus scapiatus: KIJ ൺඇ et al. (2005): 97 (record).

Material examined. INDIA: UඍඍൺඋൺκΗൺඇൽ: Dehradun, FRI Campus, 1 ♀ (on slide under four coverslips, slide No. EUL.149), 22.iii.2016, Coll. M.M.Jamali. Uඍඍൺඋ PඋൺൽൾඌΗ: Hathras, 2 ♀♀ (on slide under four coverslips, slide Nos. EUL.60, EUL.68), 6.iii.2013, Coll. S.K. Ahmed & M. T. Khan. ( ZDAMU).

Redescription. Female. Length, 1.10–1.23 mm. Head dark brown, vertex with bluish reflection. Antenna dark brown. Mesosoma with pronotum, middle lobe of mesoscutum and scutellum bluish; side lobes of mesoscutum and propodeum dark brown ( Fig. 5A ). Fore wing subhyaline, with three transverse dark brown infuscate bands as in Fig. 5B . Fore leg: coxa and femur dark brown; trochanter pale yellow; tibia in basal third brown, rest pale brown; tarsus pale white; middle leg: coxa brown; femur dark brown; tibia in basal third brown, rest pale brown; tarsal segments 1–3 brown, last tarsal segment pale yellow; hind leg: coxa, femur, tibia dark brown; first tarsal segment dark brown, 2–4 pale white. Petiole and gaster dark brown.

Head ( Fig. 6A ), in frontal view, 1.42–1.57× as broad as high; eye height 4.70–5.10× as long as malar space; antennal toruli situated much above lower eye margin. Antenna ( Fig. 6B ) with scape 2.35–2.46× as long as broad, 2.85–3.08× as long as pedicel; pedicel 0.85–0.96× as long as broad; flagellum with single anellus; F1 subequal to F2; clava 1.73–1.79× as long as broad.

Mesosoma ( Fig. 6C ) 1.20–1.34× as long as broad; pronotum 0.09–0.10× mesoscutum; notauli incomplete, faint posteriorly; middle lobe of mesoscutum ( Fig. 6D ) with 3 pairs of setae; scutellum as long as mesoscutum with 1 pair of setae; pronotum, mesoscutum, scutellum and axillae with polygonal reticulate sculpture; metanotum with dorsellum smooth, 3.25–4.60× as broad as long; sides of metanotum with longitudinal striations; propodeum smooth, without any carina. Fore wing ( Fig. 5B ) 1.89–1.92× as long as broad; marginal vein + parastigma 2.10–2.44× as long as submarginal vein, 6.40–7.30× as long as stigmal vein; postmarginal vein 0.6–0.83× stigmal vein; longest marginal seta 0.10–0.12× maximum wing width. Hind wing ( Fig. 5C ) 4.60–5.06× as long as broad; longest marginal seta 0.41–0.53× maximum wing width.

Metasoma ( Fig. 6E ). Petiole 2.28–2.66× as broad as long; gaster longer than mesosoma; ovipositor occupying more than two-thirds of gaster length, hardly exserted beyond apex of gaster; ovipositor 1.77–2.28× as long as hind tibia.

Relative measurements (n = 3; slides, at 100×). Head height: width, 28–33: 44–47; eye height, 23.00–23.50; malar space, 4.50–5.00. Antennal segments length: width – scape, 18.50–20.00: 7.50–8.50; pedicel, 6–7: 7.00–7.50; F1, 3–4: 7.50–8.00; F2, 4.50–5.00: 7–8; C1, 4.25–4.50: 6.50–7.50; C2, 3.50–4.00: 5.25–5.50; C3, 4.00: 2.50–2.75; spicula, 2.50–3.00. Mesosoma length: width, 50–56: 38–44. Fore wing length: width, 88–104: 46–54; longest marginal seta, 5.25–6.50; submarginal vein length, 18–21; parastigma length, 5.00–7.50; marginal vein length, 38–42; postmarginal vein length, 3–5; stigmal vein length, 6.00–7.50. Hind wing length: width, 81–94: 16–19; longest marginal seta, 7.50–9.00. Hind tibia length, 24–31. Metasoma. Petiole length: width, 2.50–3.00: 7–8; gaster length, 55–61; ovipositor length, 52–56.

Male. Unknown.

Differential diagnosis. Closterocerus scapiatus resembles C. phytomyzae . However, it differs from the latter mainly in the following characters: antennal scape distinctly shorter than pedicel + flagellum combined; scutellum subequal to mesoscutum; fore wing with speculum closed; submarginal vein 0.47× marginal vein. In C. phytomyzae : antennal scape subequal to pedicel + flagellum combined; scutellum shorter than mesoscutum; fore wing with speculum opened; submarginal vein 0.66× marginal vein.

Host. Sisam leaf miner (SංඇǤIJ & KIJൺඇ 1996).

Distribution in India. Uttar Pradesh, Uttarkhand (Nඈඒൾඌ 2021).

Figures

Fig.5. Closterocerus scapiatus Singh & Khan, 1996, female:A – habitus; B – fore wing; C – hind wing.

Fig. 6. Closterocerus scapiatus Singh & Khan, 1996, female: A – head, frontal view; B – antenna; C – mesosoma; D – mesoscutum, with 6 setae on mid lobe; E – metasoma.