Sthulapada vietnamensis, Narendran, T. C. & van Achterberg, Cornelis, 2016

Narendran, T. C. & van Achterberg, Cornelis, 2016, Revision of the family Chalcididae (Hymenoptera, Chalcidoidea) from Vietnam, with the description of 13 new species, ZooKeys 576, pp. 1-202 : 134-136

Taxon classification Animalia Hymenoptera Chalcididae

Sthulapada vietnamensis sp. n. Figs 192, 193-194

Type material.

Holotype, ♀ (RMNH), "Vietnam: Dak Lak, Chu Yang Sin N. P., Krong K’Mar, Mal. traps 12-13, 590 m, 22-26.x.2005, C. v. Achterberg & R. de Vries, RMNH’05”.

Diagnosis.

This new species differs from Sthulapada padata Narendran in having: 1) antenna mostly black with scape and pedicel pale brownish yellow and pale brown, respectively (in Sthulapada padata antenna is immaculate yellow); 2) legs mostly black (in Sthulapada padata legs yellow, but hind coxa slightly dark brown basally); 3) metasoma black with epipygium reddish brown (in Sthulapada padata metasoma pale brownish yellow basally and latero-ventrally); 4) apex of scutellum distinctly bi-lobed (in Sthulapada padata apex of scutellum not bi-lobed), and 5) propodeum without a median carina (in Sthulapada padata propodeum with a short median carina).

Description.

Holotype, ♀, length of body 6.6 mm.

Colour. Black except the following: scape pale brownish yellow; pedicel pale brown; apex of clava pale pink; eyes and ocelli pale reflecting yellow; tegula pale brownish yellow; apex of fore femur, fore tibia and tarsi pale brownish yellow; base and apex of mid femur pale brownish yellow; base and apex of hind tibia pale brown; hind tarsi pale brown; epipygium and caudal tooth reddish brown. Wings hyaline with veins dark brown with a patch of infuscation behind STV.

Head. Head closely pitted, interstices narrower than diameter of a pit; width of head in anterior view 1.1x its height; width in dorsal view 2.1 × its length; occiput concave; POL 5.2 × OOL; AOL 2.4 × OOL; distance between eyes in dorsal view 2.2 × POL; pre-orbital carina starting from malar ridge running upwards towards vertex and meeting each other behind anterior ocellus; geno-temporal furrow distinct but not deep; scrobe cross reticulate, not reaching anterior ocellus, margins ecarinate; height of malar space 0.5 × eye height in profile; eye length in profile 0.7 × eye height; eyes bare; antennae inserted well below level of ventral margin of eyes; scape not at all reaching anterior ocellus; relative L:W of antennal segments:scape = 25:4; pedicel = 5:4; F1-F7 = 5:6; clava = 10:6.

Mesosoma. Mesosoma closely pitted on pronotum, mesoscutum and scutellum; interstices narrower than half diameter of a pit, posterior margin concave medially; apex of scutellum bi-lobed; propodeum horizontal, with distinct submedian and sublateral carinae; area between plical carina and submedian carina coarsely sculptured with a median micro-reticulate part; area between plical carina and sublateral carina transversely carinate; lateral prespiracular part with a tooth on either side of propodeum; spiracle somewhat bean-shaped.

Wings. Fore wing 2. 7x as long as wide; relative length of CC = 53; SMV = 51; MV = 7; PMV = 3; STV = 4; MV separated from SMV by a distinct break; distal end of SMV not clavate as Sthulapada padata .

Legs. Hind coxa without a dorsal tooth; hind femur greatly swollen, 0.6 × as broad as its length, its ventral margin weakly bi-lobed with a row of teeth; inner basal part of hind femur with a tooth; hind tibia with an extra external carina; hind tarsal segments relatively larger, much wider than long; fifth tarsal segment of hind leg unusually larger than other tarsal segments; each claw unidentate.

Metasoma. Metasoma 1.4 × as long as mesosoma; T1 with 3 basal carinae; length of lateral carina 0.3 × length of T1 in dorsal view; length of median carina 0.2 × length of T1; length of T1 in dorsal view a little less than half length of metasoma; T1 smooth and shiny, posterior margin a little convex; T2 smooth and shiny with 2 rows of setigerous pits; T3 weakly shagreened with 1-2 transverse rows of minute setigerous pits; T3 to T5 more distinctly shagreened with 1-2 rows of setigerous pits; posterior margin of T2 to T5 slightly to distinctly concave progressively; T6 distinctly pitted and pubescent; epipygium carinate at middle, its median length subequal to median length of T6; epipygium with a distinct posteriorly directed ventral tooth just below ovipositor sheath and closely attached to it.

Male. Unknown.

Host.

Unknown.

Distribution.

Vietnam.