Pseudectroma indicum Hayat & Zeya

Hayat, Mohammad, Zeya, Shahid Bin & Veenakumari, K., 2013, On some brachypterous Encyrtidae (Hymenoptera: Chalcidoidea) from India, with description of four new species, Zootaxa 3716 (2), pp. 259-276: 265-267

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Pseudectroma indicum Hayat & Zeya

sp. nov.

Pseudectroma indicum Hayat & Zeya   , sp. nov.

( Figs 12–18 View FIGURES 12 – 18 )

Female. Holotype. Length, 0.82 mm (excluding exserted part of ovipositor, 0.08mm) (range 0.70–0.82 mm, n= 5). Body brown; head brown and malar space dark brown. Antenna with scape brownish yellow, margins brown; pedicel and flagellum brown, but apical (= second) segment of clava in apical half brownish yellow. Mesosoma brown; pronotum dark brown; mesoscutum pale brown, sides of propodeum dark brown. Fore wing lightly infuscate; hind wing hyaline. Legs brownish yellow. Metasoma brown, but on slide appearing brown alternating with narrow, white cross-bands due to stretching of tergites; apex of TVII white; ovipositor sheath in about distal half dark brown.

Head ( Fig. 12 View FIGURES 12 – 18 ). Subprognathous, occipital foramen situated in upper third of occiput; head in frontal view, 1.2 × as broad as high; frontovertex width 0.61 × head width; ocellar triangle with apical angle obtuse; posterior ocellus slightly less than four diameters of an ocellus to eye margin (4: 15); POL 1.66 × as long as OOL; malar space equal to eye height; head with fine, irregular reticulate sculpture, the cells transversely elongate; malar space with fine, lineolate reticulate sculpture; setae on head hyaline; eyes with setae hyaline, and each seta shorter than a facet. Mandible with 3 sharp teeth, middle tooth longest. Maxillary palp 2 -segmented, labial palp unsegmented. Antenna as in Fig. 14 View FIGURES 12 – 18 ; scape 3 × as long as broad, and slightly shorter than clava (30: 33.5); pedicel 1.63 × as long as broad; funicle segments transverse, F 1 and F 5 with ventral margins longer than dorsal margins; F 1 smallest, 1.62 × as broad as long, and 0.8 × F 2 width; F 5 2 × as broad as long, and 2.2 × as broad as F 1; clava 2 -segemented, 1.59 × as long as broad (slightly collapsed), longer than funicle (33.5: 21), and 1.44 × as broad as F 5. In antenna with an uncollapsed clava ( Fig. 15 View FIGURES 12 – 18 ), clava 1.31 × as broad as F 5, and 1.96 × as long as broad. Relative measurements (holotype, slide at 400 ×)—head frontal width, 90; head frontal height, 75; frontovertex width, 55; eye height, 34; malar space, 34; antennal scape length, 30; pedicel length, 18; F 1 length (width), 4 (6.5); F 5 length (width), 7 (14.5); funicle length, 21; clava length (width), 33.5: 21.

Mesosoma ( Fig. 16 View FIGURES 12 – 18 ). Flattened; pronotum with raised irregular sculpture, largely with cells transversely lengthened; mesoscutum with sculpture fine, the cells larger than on pronotum, and transversely lengthened; scutellum with fine, polygonal reticulate sculpture, the cells larger than on mesoscutum; setae appear hyaline; pronotum with a line of setae along collar, and several setae anteriorly; mesoscutum with 32 setae (paratypes, 24– 32); left axilla with 3 setae and right axilla with 4 (paratypes, 2–4 and 2–5); scutellum with 32 setae (paratypes, 28– 38); propodeum distal to spiracle with 3–4 short setae. Fore wing ( Fig. 17 View FIGURES 12 – 18 ) short, when laid back, reaching to anterior half of TI of gaster; left wing 2.35 × as long as broad; in most specimens the membranous apex is folded and thus the apex appears truncate, length varies from 2 × to 2.27 × width; hind wing ( Fig. 18 View FIGURES 12 – 18 ) 3.69 × as long as broad, and about 0.67 × fore wing length. Relative measurements (holotype, slide at 400 ×)—mesosoma length, 88; pronotum length (width), 15 (75); mesoscutum length (width), 30 (63); scutellum length (width), 35 (46); propodeum median length, 2; mid tibia length, 62; mid tibial spur length, 15; mid basitarsus length, 20.

Metasoma distinctly longer than mesosoma, on slide about 1.9 × as long as mesosoma; ovipositor exserted to slightly more than one-fifth length of gaster. Relative measurements (holotype, slide at 400 ×)—metasoma length, 170; TVII length, 60; ovipositor length, 148; third valvula length, 67.

Male. Unknown.

Material examined. Holotype (NBAII, Registration No. ICAR/NBAII/EN 12), female (on slide under coverslip nos. 1 and 2, slide No. EH. 1558) labelled “ INDIA: KARNATAKA: Bengaluru, Hebbal, 5.ix. 2012 (PFT), Coll. K. Veenakumari”.

Paratypes, 17 females: 1 female (on slide under coverslip no. 3, slide No. EH. 1558) with same data as holotype. INDIA: KARNATAKA: Bengaluru, Hebbal, 2 females (on slide under 3 coverslips, slide No. EH. 1555), 7.ix. 2012 (PFT), Coll. K. Veenakumari; Bengaluru, Hebbal, 2 females, one with gaster missing (on slide under 3 coverslips, slide No. EH. 1556), 16.viii. 2012 (PFT), Coll. K. Veenakumari; Bengaluru, Hebbal, 6 females (on slide under 6 coverslips, slide No. EH. 1557), 18.viii. 2012 (YPT), Coll. K. Veenakumari; Bengaluru, Attur, 6 females (on slide under 6 coverslips, slide No. EH. 1559), 18.ix. 2012 (PFT), Coll. K. Veenakumari. (12 females on slides, EH. 1557 and EH. 1559, in ZDAMU, Registration No. HYM. CH. 666; remaining paratypes in NBAII: slide No. EH. 1555, Registration No. ICAR/NBAII/EN 13; slide No. EH. 1556, Registration No. ICAR/NBAII/EN 14)

Distribution. India: Karnataka.

Etymology. The species name is derived from name of country of origin, India.

Comments. The genus Pseudectroma   contains 11 world species (Noyes 2012), of which one species, P. samarae Hayat (2010)   , was described from two brachypterous specimens. The holotype of this species has the fore wing venation reduced to a single vein, whereas in the paratype all the veins are present. Similar short winged forms with complete venation are known in Encyrtus coorgensis Hayat & Zeya   , sp. nov. described in this paper, in Prochiloneurus bolivari Mercet   (Japanese specimens and the Indian specimen recorded in this paper) and in the Palaearctic species of Pseudectroma   , P. europaeum (Mercet)   .

The new species is similar to P. samarae Hayat (2010)   , but differs in having the head 1.63 × as broad as frontovertex width; frontovertex width 1.83 × as broad as scape length; scape 3 × as long as broad; metasoma longer than head plus mesosoma (170: 163); ovipositor exserted to about one-fifth gaster length; third valvula 0.82 × second valvifer length; ovipositor 2.38 ×as long as mid tibia; body largely brown in colour. In P. samarae— head 1.78 × as broad as frontovertex width; frontovertex width 1.4 × as broad as scape length; scape about, 2.5 × as long as broad; metasoma shorter than head plus mesosoma (140: 168); ovipositor exserted to 0.34 × gaster length; third valvula 0.65 × second valvifer length; ovipositor 2.6 × as long as mid tibia; body largely yellow in colour.