Oxycoryphe scutellatus Narendran, 1989

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 : 123-124

Taxon classification Animalia Hymenoptera Chalcididae

Oxycoryphe scutellatus Narendran, 1989 Figs 178-179, 180-181, 182

Oxycoryphe scutellatus Narendran, 1989: 131 (♀, holotype, E. Malaysia, SW. Sabah) (RMNH, examined)).

Material.

2 ♀ (RMNH, IEBR), "S. Vietnam: Dóng Nai, Cát Tiên N. P., Bird trail, Mal. traps 30-35, c. 100 m, 15-20.v.2007, C. v. Achterberg & R. de Vries, RMNH’07”.

Diagnosis.

This species comes near Oxycoryphe thresiae Narendran, 1989, in the key to species by Narendran (1989), but differs from it in having: 1) scrobe cross reticulate (in Oxycoryphe thresiae scrobe striate); 2) apex of scutellum projecting 0.17-0.24 × length of remaining part of scutellum (in Oxycoryphe thresiae apex of scutellum projecting less than 0.17 × length of remaining part of scutellum); 3) PMV longer than MV (in Oxycoryphe thresiae PMV equal to MV); 4) T1 with 2 basal carinae (in Oxycoryphe thresiae T1 without a pair of basal carinae, but with a subrectangular pit), and 5) POL 3 × OOL (in Oxycoryphe thresiae POL much more than 3 × OOL).

Description

(specimen from Cát Tiên N. P.). ♀, length of body 7.5 mm.

Colour. Black; eyes grayish yellow; ocelli pale reflecting yellow; bases and apices of fore and mid femora and tibiae slightly yellowish brown; fore and mid tarsi pale brownish yellow; hind leg completely black; wings hyaline with slight yellowish brown infuscation with a weak brownish yellow arch connecting parastigma and STV.

Head. Width of head 1.1 × its height (excluding mandibles) in anterior view; width in dorsal view twice its length, a little wider than mesosoma (20:17); height of eye in profile 2.6 × height of malar space, length of eye in profile 1.7 × height of malar space; scrobe almost reaching anterior ocellus, separated from it by a sharp cross ridge; surface of scrobe cross reticulate; pre-orbital carinae horse-shoe-like, ventrally touching malar ridge; pre-orbital carina running upwards towards temple; auricular carina almost reaching malar ridge, not clearly touching it; geno-temporal furrow very narrow, narrower than diameter of adjacent pit, 0.3 × length of fore femur. POL 3.5 × OOL; AOL 1.8 × OOL; face and vertex with deep, close, umbilicate, setigerous pits; interstices carinate and rugose; antenna with scape not reaching anterior ocellus; relative L:W of antennal segments:scape = 28:4; pedicel = 3:4; F1 to F7 equal length and width (= 6:5); clava = 10:5.

Mesosoma. Pronotum anteriorly with wavy carinae joining at middle to form a median carina running to posterior margin; middle lobe of mesoscutum with close umbilicate pits, interstices as broad as or half as broad as diameter of a pit in most areas, distinctly rugulose; scutellum with slightly larger and deeper pits than those of middle lobe of mesoscutum, scutellum slightly longer than mesoscutum (26:24) (including projecting apex), 1.2 × as long as wide; apex of scutellum projected posteriorly, bi-lobed, projected apex 0.2 × as long as remaining part of scutellum (4:22). Propodeum declining 60° to the vertical axis of scutellum; submedian and sublateral carinae well developed; post spiracular tooth on each side distinct.

Wings. Fore wing 3 × as long as broad; relative length of CC = 25; SMV = 22; parastigma = 3; MV = 5; PMV = 6; STV = 2.

Legs. Hind coxa with a distinct dorso-basal tooth; hind femur without an inner basal tooth.

Metasoma. Metasoma 1.5 × as long as mesosoma; T1 with basal carinae as long as space between them, smooth and shiny; T1 0.3 × as long as metasoma, its posterior margin a little concave medially; T2 to T5 micro-sculptured, moderately pubescent laterally; posterior margins of T2 to T5 a little concave; T6 with 9-10 cross rows of shallow pits, interstices weakly micro-sculptured without a distinct smooth basal marginal strip; T6 twice as long as T5, 0.4 × as long as epipygium; visible part of ovipositor sheath 0.3 × length of epipygium.

Male. See Narendran (1989) for description.

Host.

Unknown.

Distribution.

Vietnam (new record), Malaysia, Indonesia (Sumatra), Philippines ( Narendran 1989).

Variation.

Length body of ♀ 5.3-7.8 mm. Hind coxa with basal admarginal area pale brownish, yellow in one specimen; metasoma 1.5-1.6 × as long as mesosoma; epipygium 2-4 × as long as T6; projected apex of scutellum 0.17-0.24 × as long as remaining length of scutellum; postspiracular tooth weak to strong. In some specimens hind tarsi black, while in one specimen first 3 hind tarsal segments are dark brown.