Apsilocera maculata Mitroiu

Mitroiu, Mircea-Dan & Achterberg, Cornelis Van, 2013, Revision of the Oriental species of Apsilocera Bouček (Hymenoptera, Pteromalidae), with description of twelve new species, Zootaxa 3717 (4), pp. 448-468 : 464-465

Apsilocera maculata Mitroiu & van Achterberg, sp. n.

( Figs 9 , 15, 18 , 27 )

Type material. Holotype, ♀ (RMNH), “ INDONESIA: SW SULAWESI, Gn. Bulusaraung, nr Camba, Mallawa, Mal. trap 3, c 800 m, 21.ii–25.iii.1997, C. v. Achterberg & R. de Vries, RMNH’97”. Paratypes (3 ♀ and 3 ♂, RMNH, IEBR): 1 ♀, “N. SUMATRA, Ketambe, c 400 m, near N.P. Gn. Leuser, Mal. trap, x.1994, Y. v. Nierop & C. v. Achterberg, RMNH’95”; 1 ♂, “ 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”; 1 ♀ “S. VIETNAM: Dak Lak, Chu Yang Sin N.P., nr dam, c. 500 m, 3–9.vi.2007, Mal. traps, C. v. Achterberg & R. de Vries, RMNH’07”; 1 ♀ “N. VIETNAM: Ninh Binh, Cuc Phuong N.P., nr entrance, c 225 m, 15 v –27 v 2000 (1), Mai Phu Quy, RMNH’00”; 1 ♂ “N. VIETNAM: Ninh Binh, Cuc Phuong N.P., nr centre, c 225 m, 1.xi–20.xii.1999 (I), Mai Phu Quy, RMNH’00”; 1 ♂ “N. VIETNAM: Hoa Binh, Hang Kia Pà Cò N.R., 1046 m, N20°44’37’’ E104°56’20’’, 23.x.2009, Mal. tr. 5, RMNH’09, C. v. Achterberg & R. de Vries”.

Diagnosis. Head transverse in anterior view, without ornamentation; clypeal margin with a small median tooth; each funicular segment with one row of sensilla; clava brown; mandible formula 3:4, distal tooth sharp ( Fig. 27 ). Mesosoma slightly arched; fore coxa mainly dark, mid and hind coxae pale yellow, the latter with a small dark spot basally; fore wing hyaline ( Fig. 9 ). Metasoma with large dorsal pale spot. Male with F1 distinctly shorter than F2, each F having one verticil of long setae in basal part ( Fig. 18 ).

Description. Holotype female, body length: 1.75 mm. Colour ( Fig. 9 ): head black, with very slight bluish reflections more visible on face; eyes reddish, ocelli whitish; antennae uniformly brownish-yellow, slightly darker dorsally; mandibles rather uniformly reddish-brown. Mesosoma as head, but with slight coppery reflections on pronotum, anterior part of mesoscutum, scutellum, axillae and axillulae; wings hyaline; tegula and venation brown; fore coxa mainly dark, mid and hind coxae pale yellow, the latter with a small dark spot basally; trochanters, femora and tibiae pale yellow, their extremities slightly darker; tarsi yellow, tips brownish. Metasoma dorsally brown, with well defined triangular dorsal pale spot; hind margin of distal tergites slightly darker; lateral and ventral sides of metasoma extensively pale yellow basally; ovipositor sheaths brown.

Head transverse in anterior view, without ornamentation; clypeal margin with a small median tooth; gena strongly receding towards mouth, hollowed at mouth corner ( Fig. 27 ); temple very short; occiput slightly emarginate; each funicular segment with one row of sensilla; mandible formula 3:?4, distal tooth sharp ( Fig. 27 ). Relative measurements—length: 21; width: 47; height: 35; POL: 10; OOL: 7; eye height: 24; eye length: 17; malar space: 10; mouth width: 19; distance between clypeal margin and toruli: 18; scape length: 20; pedicel length: 5; pedicel width: 3; pedicel plus flagellum: 50; F1 length: 4; F1 width: 3.5; F6 length: 5; F6 width: 4; clava length: 13; clava width: 4.

Mesosoma slightly arched ( Fig. 9 ); propodeum almost smooth; fore wing with basal cell bare, open below; basal vein bare except one hair near submarginal vein; ventral side of costal cell with only a few hairs in distal half; speculum becoming narrow along marginal vein, effaced on ventral side of wing by two irregular rows of hairs; stigma not long, lower edge not emarginate ( Fig. 9 ). Relative measurements—length: 45; width: 35; height: 27; mesoscutum length: 15; scutellum length: 15; scutellum width: 15; fore wing length: 95; fore wing width: 44; M: 23; S: 9; P: 20.

Metasoma short ovate ( Fig. 9 ); ovipositor sheaths barely visible in dorsal view. Relative measurementslength: 54; width: 34; length of first tergite: 11; distance from base of metasoma to tip of hypopygium: 32.

Male paratype ( Indonesia, S. Halmahera), body length: 1.25 mm ( Figs 15, 18 ). Similar to female, except antennae and metasoma.

Antenna longer and thinner, each F having a verticil of long setae in basal quarter, which is also darker than the rest of the pale yellow segment; F1 distinctly shorter than F2 ( Fig. 18 ). Head relative measurements—length: 14; width: 30.5; height: 20; POL: 8; OOL: 5; eye height: 12; eye length: 10; malar space: 9.5; mouth width: 12.5; distance between clypeal margin and toruli: 14; scape length: 12; pedicel length: 3; pedicel width: 2; pedicel plus flagellum: 37; F1 length: 2; F1 width: 2; F6 length: 4; F6 width: 2; clava length: 11; clava width: 2.5.

Mesosoma relative measurements—length: 29; width: 21; height: 17; mesoscutum length: 10.5; scutellum length: 10.5; scutellum width: 10.5; fore wing length: 58; fore wing width: 30; M: 13; S: 5; P: 11.

Metasoma short, oval, dorsally with large pale yellow spot covering almost half of metasoma length ( Fig. 15 ). Relative measurements—length: 33; width: 17; length of first tergite: 7.

Variability. The smallest specimen is a female from Vietnam (body length: 1.25 mm), which differs slightly in various respects (e.g. the gena less conspicuously hollowed at mouth corner; metasomal dorsal yellow spot more effaced; two hairs on basal vein). We considered all the differences to fall within the intraspecific variability, as in the case of the male paratype.

Distribution. Vietnam, Indonesia.

Hosts. Unknown.

Etymology. From the Latin “ maculatus ” (spotted), which refers to the distinct dorsal pale spot at the base of metasoma.

Comments. Apsilocera maculata belongs to a group of species without ornamentation on the vertex. It most closely resembles A. dupla from which it differs in having the clypeus with one small tooth (bidentate in A. dupla ), mandible formula 3:?4 (4: 4 in A. dupla ) ( Fig. 27 ), and metasoma dorsally with a large pale spot at base (no spot in A. dupla ).

Figures

FIGURES 7 – 12. Apsilocera spp., female, holotype, lateral view. 7 A. fulvipennis; 8 A. longicornis; 9 A. maculata; 10 A. obtusicristata; 11 A. palliclava; 12 A. tuberculata.

FIGURES 13 – 18. Apsilocera spp., male, paratype, lateral view (13 – 15) and antennae (16 – 18). 13 A. bicristata; 14 A. cornuta; 15 A. maculata; 16 A. bicristata; 17 A. cornuta; 18 A. maculata.

FIGURES 25 – 30. Apsilocera spp., female, holotype, head in anterior view. 25 A. fulvipennis; 26 A. longicornis; 27 A. maculata; 28 A. obtusicristata; 29 A. palliclava; 30 A. tuberculata.