Aclista hirsuta, Feng & Xu, 2016

Feng, Jun & Xu, Zaifu, 2016, The genus Aclista Förster, 1856 (Hymenoptera: Diapriidae) firstly recorded from China, with descriptions of three new species, Zoological Systematics 41 (3), pp. 273-279 : 277-278

Aclista hirsuta sp. nov. ( Figs 7–9 )

Material examined. Holotype ♀, China, Guangdong, Nanling National Nature Reserve , 4–6.VIII.2004, coll. Jingxian Liu & Liqiong Weng ( SCAU).

Description. Holotype. Female. Body length 2.5 mm. Fore wing length 2.1 mm.

Color. Body blackish-brown. Antennae brown. Legs and mandibles brownish-yellow.

Head. Head in dorsal view 2.00× as wide as long, as wide as mesosoma; in frontal view subtriangular, with prominent antennal sockets. Toruli separated from each other, without shallow cleft between them. Mandibles sickle-shaped and overlapping. Clypeus convex, smooth and lustrous. Face lustrous, with pubescence, without facial furrow. Antenna 15-segmented, with dense pubescence. Scape slender, cylindrical, and bowed slightly. Relative ratio of length to width of antennal segments as follows: 3.8: 0.8, 1.0: 0.7, 3.0: 0.5, 2.0: 0.5, 1.5: 0.5, 1.3: 0.7, 1.2: 0.8, 1.2: 0.8, 1.2: 0.8, 1.2: 0.8, 1.0: 0.8, 1.0: 0.8, 1.0: 0.8, 1.0: 0.8, 1.5: 0.7. Ocelli large. OOL: POL=1.2: 1.0. Eye oval, with sparse pubescence, 1.30× as long as wide. Occipital carina complete.

Mesosoma. Mesosoma with sparse pubescence. Pronotal collar indistinct in dorsal view. Mesoscutum convex. Notauli complete. Parapsidal line slender and long. Anterior scutellar pit large and trapezoidal. Axillar pits large and rounded, with tuft of pubescence inside. Scutellar disc flat. Dorsellum flat. Propodeum lustrous. Median keel of propodeum simple. Inner plicae converging and not projecting posteriorly. Outer plicae turned outwards posteriorly, ending in a sharp tooth. Fore wing with parastigma 1.88× as long as marginal vein (1.5: 0.8); radial cell closed, 3.38× as long as marginal vein (2.7: 0.8).

Metesoma. Petiole subcylindrical, with indistinct and irregular longitudinal rugosity; 1.33× as long as middle width (2.0: 1.5). Gaster fusiform, tapering at a sharp point. T 2 smooth and lustrous, widest portion almost in middle. T 2 with median furrow extending to 0.3 of its length. Base of T 2 with two lateral striations on either side of median furrow; apex of all striation with ring of pubescence. T 2 1.49× as long as wide (10: 6.7). Pygidium shorter than prepygium (1.5: 2.5).

Male. Unknown.

Distribution. China (Guangdong).

Biology. Unknown.

Etymology. The specific name of the new species is referred to the ring of pubescence on T 2.

Remarks. This new species is closely related to A. leana Rajmohana & Narendran, 2006 , but can be distinguished from the latter by following characteristics: A3 6.00× as long as wide, and 0.79× scape length (4.00× and 0.60× respectively in A. leana ); A15 0.50× A3 length (0.66 in A. leana ); pronotal collar indistinct in dorsal view (distinct in A. leana ); fore wing with radial cell 3.38× as long as marginal vein (2.00× in A. leana ); and petiole 1.33× as long as middle width (more than 2.00× in A. leana ).

Funding This study was supported by the National Natural Science Foundation of China (31272351, U0936601).

Figures

Figures 7–9. Aclista hirsuta, sp. nov., holotype. 7. Antenna. 8. Head, mesosoma and metasoma, dorsal view. 9. Fore wing.