Trigastrotheca luzonensis, Quicke, Donald L. J., Butcher, Buntika A., Ranjith, A. P. & Belokobylskij, Sergey A., 2017

Quicke, Donald L. J., Butcher, Buntika A., Ranjith, A. P. & Belokobylskij, Sergey A., 2017, Revision of the non-Afrotropical species of Trigastrotheca Cameron (Hymenoptera: Braconidae: Braconinae) with descriptions of four new species, Zootaxa 4242 (1), pp. 95-110 : 98-100

Trigastrotheca luzonensis sp. nov.

( Figs 1 , 2 )

Material examined. Holotype, female, “ Manila, P.I. [ Philippines] II.28.1963 Townes family” ( EMUS).

Length of body 4.1 mm, fore wing 3.8 mm, and antenna 5.1 mm.

Head. Antenna with 42 flagellomeres. Terminal flagellomere acuminate. Median flagellomeres 1.15 x longer than wide. First flagellomere 1.0 and 1.1 x longer than 2nd and 3rd respectively. Width of head: width of face: height of eye = 2.85: 1.55: 1.0. Face coriaceous. Inter-tentorial distance: tentorio-ocular distance = 1.5: 1.0. Malar suture broad, shallow, weakly defined. Frons deeply impressed postero-medial to antennal sockets, with strong midlongitudinal carina. Shortest distance between posterior ocelli: transverse diameter of posterior ocellus: shortest distance between posterior ocellus and eye = 2.3: 1.0: 4.3. Occiput near eyes with distinct transverse corrugation.

Mesosoma. Mesosoma 1.3 x longer than high. Mesoscutum with weak but distinct midlongitudinal carina on anterior half. Mesopleuron with dense setiferous punctation, shiny dorsally. Median area of metanotum with complete midlongitudinal carina. Midlongitudinal propodeal carina lamelliform, strongly raised posteriorly.

Wings. Fore wing. Lengths of veins r-rs: 3 RSa: 3RSb = 1.0: 1.15: 4.5. Lengths of veins 2RS: 3 RSa: rs-m = 1.1: 1.0: 1.1. Base of hind wing without glabrous area next to vein cu-a.

Legs. Claws with an angular basal lobe. Lengths of fore femur: fore tibia: fore tarsus = 1.2: 1.0: 1.2. Lengths of hind femur: hind tibia: hind tarsus = 1.0: 1.2: 1.1.

Metasoma. Metasomal tergites 2–5 with coarse reticulate sculpture superimposed on coriaceous background. Tergite 2 with sublateral grooves weak, curved, diverging posteriorly. Second metasomal suture weakly curved, deep; median length of 3rd tergite 1.2 x 2nd tergite. Fifth tergite the submedial emarginations separated by a rather acute medial prominence, and the base of the emarginations more or less straight.

Colour. Head pale yellow, mesosoma largely ochreous yellow, metasomal tergites ochreous brown without white markings, metasomal tergites 2 and 3 somewhat darker sublaterally, and metasomal tergite 4 with an illdefined brown sublateral spot. Legs ochreous yellow. Wings smokey with brown to dark brown venation; pterostigma black.

Male. Unknown.

Host. Unknown.

Distribution. Manila ( Philippines).

Etymology. Named after the island of Luzon ( Philippines) where the holotype and only known specimen was collected.

Figures

FIGURE 1. Trigastrotheca luzonensis Quicke & Butcher sp. nov., holotype, female, (♀). A, habitus lateral view; B, head and mesosoma, lateral view; C, head, dorsal view; D, fore wing; E, head, front view.

FIGURE 2. Trigastrotheca luzonensis Quicke & Butcher sp. nov., holotype, female, (♀). A, metasomal tergites 2 – 5, posterodorsal view; B, metasomal tergite 5, lateral view.