Zaglyptus glaber Gupta, 1961

Pham, Nhi Thi, Broad, Gavin R. & Wägele, Wolfgang J., 2013, First record of the genus Zaglyptus Förster (Hymenoptera: Ichneumonidae: Pimplinae) from Vietnam, with description of one new species, Zootaxa 3702 (5), pp. 483-492 : 484-486

Zaglyptus glaber Gupta, 1961

( Fig. 1 )

Zaglyptus glaber Gupta, 1961 . Indian Jour. Entomol. 22 (1960): 252.

Zaglyptus glaber glaber Gupta, 1961 . Indian Jour. Entomol. 22 (1960): 253. Holotype: ♀, India: Namkum (GPTA). Zaglyptus glaber singaporensis Gupta, 1961 . Indian Jour. Entomol. 22 (1960): 254. Holotype: ♀, Singapore, Baker Coll. (USNM). New synonym.

Diagnosis. Face yellow, wider than high, with minute and shallow punctures; metasomal tergites 2–5 each with mshaped black mark basally; swellings on tergites punctate; ovipositor straight, about 1.5x hind tibia.

Description based on Vietnamese specimens ( Fig. 1 ). Female. Head. Antenna with 23 flagellomeres, first flagellomere 1.6x length of second; diameter of lateral ocellus equal to ocellar-ocular distance; frons polished, impunctate; inner margins of eyes weakly concave opposite antennal sockets, parallel or slightly convergent ventrally; face 0.8–0.9x as high as wide, pubescent, upper margin slightly concave between antennal sockets; clypeus about 0.5x as high as wide; malar space about 0.3x basal width of mandible; occipital carina meeting hypostomal carina at about basal mandible width from base of mandible.

Mesosoma . Epomia 0.5–0.7x as long as basal mandible width; pronotum impunctate and polished; mesoscutum 1.3x as long as wide at anterior level of tegulae, almost hairless, notauli impressed, convergent at posterior 0.4 of mesoscutum in shallow hollow; scutellum strongly convex, pubescent, lateral carina present at base; mesopleuron pubescent, epicnemial carina present on lower 0.7 of mesopleuron, lateral section of postpectal carina present as short stub in front of mid coxa; metapleuron polished, anterior 0.35 of submetapleural carina present; propodeum short, pubescent, without carinae, with mediobasal hollow; propodeal spiracle round, touching pleural carina. Fore femur 5.0–5.5x as long as wide; hind leg with femur 4.3–4.5x as long as wide, length 0.75x tibia, tibia 8.0x as long as apical width; basitarsus 0.42x length of tibia, 0.45x tarsus, 2.7x second tarsomere, fifth tarsomere 2.0x third, hind tibia slightly swollen subbasally. Fore wing with vein Rs & M opposite cu-a, 2 rs-m about 0.5x distance between 2 rs-m and 2 m-cu, vein cu-a inclivous, vein Cu 1 a separated from 1 m-cu by 0.8–0.9x length of vein Cu 1 b; hind wing with vein M+Cu moderately bowed posteriorly, first abscissa of vein Cu 1 about 1.0–1.15x length of vein cu-a; distal abscissa of vein Cu 1 present.

Metasoma. Tergites coarsely punctate, except apical transverse smooth bands; first tergite 0.8–0.9x as long as apical width, dorsolateral carina present from base to spiracle, median longitudinal carina basally present; second tergite 0.8–0.9x length of first tergite, 0.55–0.65x as long as apical width, basal and apical oblique grooves moderately deep; third tergite as long as or slightly shorter than second tergite; tergites 2–5 each with a pair of lateral punctate swellings; ovipositor straight, cylindrical, 1.5x as long as hind tibia.

Colour. Yellow. Antenna yellow to light brown; frons and hind side of head black medially, occipital area black; face yellow, except one female from Phu Tho Province with black spot medially in upper half; pronotum with black transverse band medially; mesoscutum with a stripe on median lobe, two long stripes on lateral lobes and a spot in front of scutellum black; mesopleuron with black transverse stripe below subalar prominence, metapleuron yellow; propodeum with basal and apical black marks; legs with subbasal and apical bands of tibia and apical band of basitarsus black; wing hyaline, pterostigma and veins light brown, except coxa yellow; first tergite with anchor-like black mark extending from base to apical transverse grooves or sometimes only median black mark present apically, tergites 2–5 with m-shaped black marks basally; tergites 6–7 with broadly triangular black marks; ovipositor reddish brown.

Male. Similar to female except flagellum with 22–24 flagellomeres, first flagellomere 1.5x second; hind basitarsus 2.0x second tarsomere; fifth tarsomere 1.5x third; first tergite 1.2–1.4x as long as apical width; two specimens from Vinh Phuc Provinces have black transverse band on pronotum, other specimens have only black mark on mesopleuron dorsally; basal 0.5 of tergites 2–5 black; black marks on tergites 6–7 broader.

Distribution. Previously recorded from China, India and Singapore ( Yu et al. 2012). This is the first record of Z. glaber from Vietnam ( Fig. 4 ).

Remarks. Two subspecies have been recognised: Z. glaber glaber from China and India and Z. glaber singaporensis from Singapore. They differ from each other by the length of the submetapleural carina and by the black pattern on the mesopleuron and metapleuron. Except for one female specimen from Phu Tho Province, all other Vietnamese specimens lack the central black spot on the mesopleuron and their metapleura are entirely yellow, resembling the nominate subspecies, but the submetapleural carinae are shorter (present on anterior 0.35), resembling subspecies from Singapore. As the differences between two subspecies have not proved to be stable we here synonymise the two names.

Material examined. Vinh Phuc, Vinh Yen, Ngoc Thanh: 1♀ 2♂ ( IEBR), 11–25.x.2000; 2♂ ( IEBR), 16.xi– 05.xii.2000, Malaise trap, L. D. Khuat leg.; 1♀ ( ZFMK), 28.iii.2001, hand net, N. T. Pham leg., Thai Nguyen, Dai Tu, Cat Ne: 1♂ ( IEBR), 15–20.v.2007, Malaise trap, L. D. Khuat leg.; Ninh Thuan, Nui Chua NP: 1♀ ( RMNH), 22–29.v.2007, Malaise trap, C. v. Achterberg & R. de Vries leg.; Phu Tho, Xuan Son NP: 1♀ ( IEBR), 20– 30.iii.2009; 1♂ ( IEBR), 06–10.vii.2009, Malaise trap, L. D. Khuat leg.

Figures

FIGURE 1. Zaglyptus glaber: a. dorsal view; b. wings; c. ovipositor; d. face; e. dorsal view of scutellum and propodeum; f. metapleuron.

FIGURE 4. Distribution map of Zaglyptus in Vietnam: (▲) Z. glaber, (●) Z. guptai sp. nov. and Z. nigrolineatus.