Apsilocera bicristata Mitroiu
Creators: name: Mitroiu, Mircea-Dan
name: Achterberg, Cornelis Van
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Pteromalidae
Apsilocera
Apsilocera bicristata

description: Apsilocera bicristata Mitroiu & van Achterberg, sp. n.
(Figs 2, 13, 16, 20)
Type material. Holotype, ♀ (RMNH), “ INDONESIA: S Halmahera, 20 km S Payahe, Sagutora, Mal. trap 13, c 115 m, 18.ii–18.iii.1995, C. v. Achterberg, R. de Vries & Y. Yasir, RMNH’95”. Paratype (1 ♂, RMNH): same label data as holotype.
Diagnosis. Head slightly transverse in anterior view, with one discontinuous crest between anterior ocellus and posterior ones; clypeal margin rounded (Fig. 20); each funicular segment with one row of sensilla; clava with only last two segments yellowish (Fig. 2); distal tooth of mandible blunt (Fig. 20). Mesosoma dorsally arched; fore coxa mainly dark, mid and hind coxae pale yellow, the latter with a medium dark spot basally; fore wing hyaline (Fig. 2). Metasoma dorsally brown except small pale basal depression. Male antenna with one verticil of long setae on each funicular segment, F1 not shorter than F2 (Fig. 16); male metasoma dorsally with large pale yellow spot occupying most of its length (Fig. 13).
Description. Holotype, ♀, body length: 2.2 mm. Colour (Fig. 2): head black, with slight olive green metallic reflections; eyes reddish, ocelli whitish; scape reddish-yellow in distal half, pale yellow proximally; pedicel reddish-yellow, dorsally darker; flagellum brown except last two claval segments pale yellow; mandible reddishyellow, teeth reddish-brown. Mesosoma as head; wings hyaline; tegula and venation brown; fore coxa mainly dark, mid and hind coxae pale yellow, the latter with a medium dark spot basally; trochanters, proximal half of femora, and tibiae pale yellow; distal half of femora brown; tarsi yellow, tips brown. Metasoma dorsally brown; first tergite with a small yellowish depression at base; ventral and lateral sides of metasoma yellowish at base; ovipositor sheaths brown.
Head slightly transverse in anterior view, with one discontinuous crest between anterior ocellus and posterior ones; clypeal margin rounded; gena moderately receding towards mouth, not hollowed at mouth corner (Fig. 20); temple absent; occiput slightly emarginate; each funicular segment with one row of dense sensilla (Fig. 2); mandible formula 4:4, mandible large, distal tooth blunt (Fig. 20). Relative measurements—length: 25; width: 55; height: 46; POL: 11; OOL: 11; eye height: 24; eye length: 19; malar space: 12; mouth width: 25; distance between clypeal margin and toruli: 31; scape length: 26; pedicel length: 5.5; pedicel width: 3.5; pedicel plus flagellum: 62; F1 length: 7; F1 width: 4; F6 length: 6; F6 width: 4; clava length: 15; clava width: 4.
Mesosoma arched (Fig. 2); propodeum almost smooth, but with some longitudinal rugae; fore wing with basal cell bare, open below; basal vein with double row of hairs; ventral side of costal cell with one row of hairs, and a few additional hairs in distal part; speculum reaching proximal end of M; stigma elongated (Fig. 2). Relative measurements—length: 50; width: 40; height: 33; mesoscutum length: 19; scutellum length: 18; scutellum width: 20; propodeum length: 7; fore wing length: 113; fore wing width: 48; M: 27; S: 14; P: 28.
Metasoma short ovate (Fig. 2); basal tergite with small depression at base; ovipositor sheaths not visible in dorsal view. Relative measurements—length: 68; width: 39; length of first tergite: 23; distance from base of metasoma to tip of hypopygium: 50.
Male paratype, body length: 1.5 mm (Figs 13, 16). Similar to female, except antennae and metasoma.
Antenna longer and thinner, each F having one verticil of long setae in basal third, which is also darker than the distal part (Figs 13, 16). Head relative measurements—length: 18; width: 41; height: 34; POL: 8; OOL: 8; eye height: 17.5; eye length: 14; malar space: 8.5; mouth width: 19; distance between clypeal margin and toruli: 23; scape length: 20; pedicel length: 4.5; pedicel width: 2.5; pedicel plus flagellum: 56; F1 length: 6; F1 width: 2.5; F6 length: 5.5; F6 width: 2; clava length: 14; clava width: 2.5.
Mesosoma relative measurements—length: 39; width: 30; height: 26; mesoscutum length: 16; scutellum length: 15; scutellum width: 17; fore wing length: 85; fore wing width: 38; M: 19; S: 10; P: 20.
Metasoma shorter than mesosoma, oval; dorsal side with large pale yellow spot occupying most of metasoma length; lateral and ventral sides extensively pale yellow (Fig. 13). Relative measurements—length: 35; width: 28.
Distribution. Indonesia.
Hosts. Unknown.
Etymology. The name is derived from the Latin words “ bis ” (twice) and “ cristatus ” (crested), and refers to the two distinct crests present on the head.
Comments. Apsilocera bicristata belongs to a group of species having conspicuous crests on the vertex. It most closely resembles A. longicornis and A. obtusicristata. From both species it differs in having the last two claval segments pale yellow (Fig. 2). In addition, from A. longicornis it differs mainly in having all F with only one row of sensilla (Fig. 2), and from A. obtusicristata mainly in having the distal tooth of the mandible blunt (Fig. 20).
description: Published as part of Mitroiu, Mircea-Dan & Achterberg, Cornelis Van, 2013, Revision of the Oriental species of Apsilocera Bouček (Hymenoptera, Pteromalidae), with description of twelve new species, pp. 448-468 in Zootaxa 3717 (4) on pages 455-459, DOI: 10.11646/zootaxa.3717.4.2, http://zenodo.org/record/248095