Closterocerus pakyongensis, Jamali & Zeya, 2021

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 : 237-239

Closterocerus pakyongensis sp. nov.

( Figs 7–8 )

Type material. Hඈඅඈඍඒඉൾ: ♀ (on slide under four coverslips, slide No. EUL.71), INDIA: Sංκκංආ: Pakyong, NRC campus, 2.xi.2014, ( MT), Coll. K. Veenakumari. ( ZDAMU). Pൺ*©ൺඍඒඉൾඌ: 1 J (on slide under four coverslips, slide No. EUL.70); 2 JJ (on cards), with same data as for holotype ( ZDAMU).

Description. Female. Holotype ( Fig. 7A ). Length, 0.91 mm. Head dark brown with bluish green reflection on vertex. Antenna dark brown. Mesosoma mostly dark brown, mesoscutum and scutellum with bluish green reflection. Fore wing subhyaline, with three brown infuscate bands ( Fig. 7B ). Fore leg: coxa and femur dark brown; tibia and tarsi pale yellow; middle leg: coxa pale yellow, femur dark brown, tibia yellow with dorsal margin brown, tarsi pale yellow; hind leg: coxa, femur and tibia dark brown, tarsi yellow except for brown first tarsal segment. Petiole and gaster dark brown except for bluish green T1.

Head ( Fig. 8A ), in frontal view, 1.18× as broad as high; eye height 6.16× as long as malar space; antennal toruli situated above lower eye margin; head with sculpture as in figure 133. Antenna ( Fig. 8B ) with scape 2.70× as long as broad, 3× as long as pedicel; pedicel broader than long, 0.90× as long as broad; flagellum with single anellus; F1 0.44× as long as broad, slightly shorter than F2; clava 3.60× as long as broad.

Mesosoma ( Fig. 8C ) 1.34× as long as broad; pronotum narrow and visible in dorsal view; mesoscutum subequal in length to scutellum; notauli incomplete, furrows appear faint posteriorly; middle lobe of mesoscutum with 1pair of setae; scutellum distinctly longer than broad with 1 pair of long setae; mesoscutum, scutellum and axillae with polygonal reticulate sculpture, more prominent on mesoscutum with relatively larger cells; metanotum with dorsellum smooth, 4.50× as broad as long; sides of metanotum with longitudinal striations; propodeum smooth medially, laterally with longitudinal reticulate sculpture. Fore wing ( Fig. 7B ) 2.18× as long as broad; marginal vein + parastigma 2.32× as long as submarginal vein, 8× as long as stigmal vein; postmarginal vein 1.25× as long as stigmal vein; longest marginal seta 0.28× maximum wing width. Hind wing ( Fig. 7C ) 6.80× as long as broad; longest marginal seta slightly longer than maximum wing width.

Metasoma ( Fig. 8D ). Petiole 1.28× as broad as long; gaster slightly longer than mesosoma; ovipositor occupying two-thirds of length of gaster, slightly exserted beyond apex of gaster; ovipositor 1.65× as long as hind tibia.

Relative measurements (holotype slide, at 100×). Head height: width, 22: 26; eye height, 18.50; malar space, 3. Antennal segments length: width– scape, 13.50: 5.00; pedicel, 4.50: 5.00; F1, 2.00: 4.50; F2, 3: 5; C1, 3.50: 4.75; C2, 3.75: 3.5; C3, 5.00: 2.25; spicula, 3. Mesosoma length: width, 35: 26. Fore wing length: width, 70: 32; longest marginal seta, 9; submarginal vein length, 14; parastigma length, 3.50; marginal vein length, 29; postmarginal vein length, 5; stigmal vein length, 4. Hind wing length: width, 62: 9; longest marginal seta, 9.50. Hind tibia length, 20. Metasoma. Petiole length: width, 3.50: 4.50; gaster length, 38; ovipositor length, 33.

Male. Paratype ( Fig. 7D ). Similar to female except for antenna and sexual characters. Head in frontal view, 1.29× as broad as high; eye height 4.25× as long as malar space. Antenna with scape 2.8× as long as broad, 2.5× as long as pedicel; pedicel subquadrate; flagellum with single anellus; F1 0.45× as long as broad, shorter than F2; clava 2.35× as long as broad. Phallobase ( Fig. 8E ) 0.45× as long as hind tibia.

Relative measurements (slide, at 100×). Head height: width, 24: 31; eye height, 17; malar space, 4. Antennal segments length: width – scape, 14: 5; pedicel, 5.50: 5.25; F1, 2.25: 5.00; F2, 4: 5; C1, 3.25: 5.00; C2, 3.50: 3.25; C3, 4.25: 2.25. Fore wing length: width, 72: 29; longest marginal seta, 9; submarginal vein length, 15; marginal vein length, 29; postmarginal vein length, 5; stigmal vein length, 5.50.

Differential diagnosis. Closterocerus pakyongensis sp. nov. looks similar to C. scapiatus , but differs from the latter in the following characters: clava 3.60× as long as broad; postmarginal vein longer than stigmal vein; middle lobe of mesoscutum with 1 pair of setae. In C. scapiatus : clava 1.73× as long as broad; postmarginal vein distinctly shorter than stigmal vein; middle lobe of mesoscutum with 3 pairs of setae.

Etymology. The species name is derived from the name of town locality Pakyong in Sikkim where the holotype was collected; adjective.

Host. Unknown.

Distribution in India. Sikkim.

Figures

Fig. 7. Closterocerus pakyongensis sp. nov. A–C – female (holotype): A – habitus; B – fore wing; C – hind wing. D – male (paratype), habitus.

Fig. 8. Closterocerus pakyongensis sp. nov., A–D – female (holotype): A – head, frontal view; B – antenna; C – mesosoma; D – metasoma. E – male (paratype), genitalia.