Trigastrotheca sublobata Quicke, 2024

Quicke, Donald L. J., Van Noort, Simon, Ranjith, Avunjikkattu Parambil, Friedman, Ariel L. L., Mejlon, Hans & Butcher, Buntika A., 2024, Revision of Trigastrotheca Cameron (Hymenoptera, Braconidae, Braconinae) with descriptions of 13 new species, ZooKeys 1205, pp. 115-167 : 115-167

Trigastrotheca sublobata Quicke sp. nov.

Fig. 27

Type material.

Holotype ♀, Thailand: Nan Province, Phasing , 2018–2019, light trap, coll. Chansri, K. ( CUMZ).

Diagnosis.

May be distinguished from the other Oriental species with three black patches on the mesoscutum and medial black patches on most of the metasomal tergites by its only weakly produced and very wide middle lobe of T 5 (Fig. 27 E ).

Description.

Holotype female. Length of body 3.1 mm, fore wing 2.7 mm. Head. Antenna with 28 flagellomeres. Terminal flagellomere, short, sub-triangular, acuminate. First flagellomere 1.0 × longer than 2 nd and 3 rd, the latter 1.7 × longer than wide. Width of head: width of face: height of eye = 2.5: 1.3: 1.0. Face with fine transverse striations radiating towards middle from eye margin; with weak mid-longitudinal ridge. Inter-tentorial distance 1.1 × longer than tentorio-ocular distance. Malar suture impressed. Malar space 1.6 × as long as basal width of mandible. Antennal sockets strongly produced. Frons hardly impressed behind antennal socket with shallow mid-longitudinal groove. Shortest distance between posterior ocelli: transverse diameter of posterior ocellus: shortest distance between posterior ocellus and eye = 1.5: 1.0: 2.8. Mesosoma 1.5 × longer than high. Mesoscutum granulate; notauli not impressed except very short anterior part with few weak crenulations. Scutellar sulcus shallow, narrow, finely crenulate. Scutellum finely granulate without small pit medially behind sulcus. Median area of metanotum with complete mid-longitudinal carina. Propodeum granulate; mid-longitudinal carina complete, not lamelliform, not bordered narrowly by fine crenulations; posteriorly propodeum with short longitudinal carinae associated with few longitudinal wrinkles. Wings. Fore wing. Lengths of fore wing veins r-rs: 3 RSa: 3 RSb = 1.0: 1.0: 4.1. Lengths of vein 2 RS: 3 RSa: rs-m = 1.3: 1.2: 1.0. Base of hind wing distinctly setose. Legs. Lengths of fore femur: fore tibia: fore tarsus = 1.0: 1.0: 1.2. Lengths of hind femur: hind tibia: hind tarsus = 1.0: 1.3: 1.2. Claws with small acutely pointed basal lobe. Metasoma. T 1 1.6 × wider than long. T 2 1.1 × as long as T 3. T 1 coriaceous. TT 1–5 with coarse reticulate sculpture. Second metasomal suture and basal grooves of TT 4 and 5 deep, strigose. T 5 with postero-lateral margin of convex, unevenly denticulate; medial protuberance broadly rounded posteriorly. Coloration. Body yellow except mandible apically, stemmaticum, occiput ventrally, middle lobe of mesoscutum anterior 1 / 2, lateral lobe of mesoscutum, tegula, propleuron posteriorly, mesopleuron ventrally, propodeum anterior 1 / 2, hind tibia apical 1 / 2, hind tarsus, T 1 postero-medially, T 2 except laterally, TT 3–5 except laterally and posteriorly, ovipositor sheath brown.

Male. Unknown.

Distribution.

Oriental ( Thailand).

Host.

Unknown.

Etymology.

Name refers to the relatively short medial and lateral lobes of the T 5.

Figures

Figure 27. Trigastrotheca sublobata sp. nov. ♀ holotype A habitus, lateral view B head, anterior view C head and mesosoma, dorsal view D head and mesosoma, lateral view E TT 4 and 5, dorsal view.