Hyperimerus sichuanicus Yang & Xiao

Yang, Lan, Huang, Da-wei & Xiao, Hui, 2019, A new species of Hyperimerus Girault from China, with a key to species of the genus (Hymenoptera, Chalcidoidea, Pteromalidae), ZooKeys 817, pp. 105-112 : 105

Hyperimerus sichuanicus Yang & Xiao sp. n.

Diagnosis.

Antenna with Fu1 shorter than pedicel; Fu7 quadrate, clava as long as Fu5-Fu7 combined; marginal fringe of outer margin of fore wing longer than length uncus; postmarginal vein 1.65 × as long as stigmal vein; propodeum with irregularly and densely sculptured, most of them as big as propodeal spiracles; ovipositor sheaths protruded, not longer than 1/2 length of gaster.

Description.

Female (holotype). Body length 1.4 mm. Head and body dark green with bluish reflection. Mandibles brown, antennae dark brown. Coxae concolorous with body, remainder of legs brown except tibiae yellowish brown, colour gradation from yellowish brown to brown at tarsi.

Head in frontal view 1.26 × as wide as high (Fig. 1); eyes height 0.62 × head height; eyes separated by 1.24 × their height. Antennal scrobes deep and glabrous, not reaching anterior ocellus (Fig. 2), interantennal crest distinct. Clypeal suture obvious, clypeus and supraclypeal area slightly prominent, clypeal margin truncate. Antennal insertion on lower ocular line, close to clypeal margin, distance from upper margin of torulus to lower margin of anterior ocellus 7 × distance from lower margin of torulus to lower margin of clypeus. Gena smooth and convex; malar sulci distinct, malar space 0.67 × eyes height. Antenna (Fig. 4) clavate; scape 1.14 × eyes height, reaching anterior ocellus; length of pedicel and flagellum combined longer than head width (1.16 ×); pedicel conical, 2 × as long as broad in lateral view; anellus transverse; each funicular segment and clava segment with single row of sensilla; ratio of length and width from Fu1 to Fu7 as 3:3, 4:3.5, 4:4, 5:4, 5:4, 5:5, 5:5; clava equal to length of Fu5-Fu7 combined. Head in dorsal view, 1.95 × as wide as long (Fig. 3); vertex convex, POL 2.75 × OOL.

Head 1.27 × as broad as mesosoma. Mesosoma convex, 1.76 × as long as broad. Pronotum, mesoscutum and anterior area of scutellum with engraved reticulation. Pronotum 0.91 × as broad as mesoscutum. Mesoscutum 2 × as broad as long; notauli deep and complete. Scutellum weakly convex, frenal line obscured medially, frenum with longitudinal rugae (Fig. 5), frenum ca. 1/5 length of scutellum. Dorsellum glabrous, 4 × as broad as long, 0.17 × as long as propodeum. Propodeum (Fig. 5) 0.71 × as long as scutellum, median carina distinct; areolate sculptures on median area irregular and dense, most cells as big as propodeal spiracles; area otherwise glabrous; propodeal spiracles ovate, separated from metanotum by 1.5 × spiracular width; callus densely hairy laterally and posteriorly. Prepectus smooth and with sparse hairy. Upper mesepisternum setose and finely reticulate, area otherwise smooth. Fore wing (Fig. 6) 2.63 × as long as broad, speculum absent; marginal fringe of outer margin of fore wing longer than length of uncus; costal cell with sparse setae; ratio of submarginal vein: marginal vein: postmarginal vein: stigmal vein as 49:18:26:16; stigmal vein oblique, stigma slightly expand, uncus ca. 1/4 length of stigmal vein.

Gaster ovate, 1.88 × as long as broad, shorter than head and mesosoma combined. Petiole short, 0.5 × as long as broad, dorsum with longitudinal ridges. Each gastral tergite smooth; Gt1 with long hairy around petiole; Gt1 and Gt2 large and smooth, 0.47 × length of gaster. Ovipositor sheaths distinctly produced in dorsal view; gaster in lateral view, ovipositor sheaths 0.47 × length of gaster, 0.76 × length of hind tibia.

Male. Body slender, scape yellowish-brown, antenna segmented clearly, others similar to the female.

Remarks.

The new species is similar to H. corvus , but different by the antenna with Fu1 shorter than pedicel, ovipositor sheaths shortly protruded. It is also very close to H. pusillus in having the Fu1 shorter than pedicel, ovipositor sheaths shorter than 1/2 length of gaster, but can be recognized by the characters listed in the key.

Material examined.

Holotype. China, ♀, Sichuan: Kangding, 30.04°N, 101.57°E, 15.VI.2017, leg. Yanzhou Zhang (Hyp-2018-06, original number ZYZ-2017-28). Paratypes. 1♀1♂, Sichuan: Kangding, 29.VI.2017, leg. Yanzhou Zhang (Hyp-2018-01, Hyp-2018-02, original number ZYZ-2017-08); 1♀, Sichuan: Kangding, 2.VIII.2017, leg. Yanzhou Zhang (Hyp-2018-03, original number ZYZ-2017-20); 1♂, Sichuan: Kangding, 29.VI.2017, leg. Yanzhou Zhang (Hyp-2018-08, original number ZYZ-2017-029).

Etymology.

Named after the location of the type material.

Hosts.

Unknown.

Distribution.

China (Sichuan).