Polynema (Polynema) breviscapus Wang & Aishan sp. nov.

Fig. 1

Type material.

Holotype: • ♀ (ICXU) on slide (Fig. 1 H): China, Xinjiang, Xinhe, 41°32'33"N, 82°36'12"E, 15.VII.2001, Wei Wu, sweeping . Paratypes (all in ICXU): China, Xinjiang: • 1 ♀, Jinghe, 44°36'03"N, 82°53'22"E, 15.VII.2001, Hongying Hu et al., sweeping ; • 4 ♀♀, Xinhe, 41°32'38"N, 82°36'16"E, 1.VI.2001, Wei Wu, sweeping .

Diagnosis.

Antenna (Fig. 1 B) with scape smooth, almost as long as pedicel; F 2 as long as F 6; clava longer than combined length of three preceding flagellomeres and longer than combined length of F 1 – F 3, with eight mps. Mesosoma smooth; pronotum (Fig. 1 C) with four setae on each side along anterior margin; scutellum (Fig. 1 C) with a frenal row of foveae, they are distinctly wider and apparently shallower; propodeum (Fig. 1 C) with a complete median carina shaped posteriorly as an inverted narrow Y-shape. Ovipositor (Fig. 1 G) slightly exserted beyond gastral apex.

Description.

Female (holotype and paratypes). Body length 426–438 μm (n = 6). Head (Fig. 1 A) in frontal view 0.6 × (0.6–0.8 ×) as high as wide. Antenna (Fig. 1 B) with scape smooth, 1.8 × (1.8–1.9 ×) as long as wide (including short radicle), almost as long as pedicel; pedicel 2.1 × (1.5–2.1 ×) as long as wide, 2.3 × (1.9–2.4 ×) as long as F 1; F 1 the shortest funicular; F 2 as long as F 6 and both the longest funiculars; F 4 and F 5 subequal in length; F 6 with one mps; clava 3.3 × (2.9–3.7 ×) as long as wide, longer than combined length of three preceding flagellomeres and longer than combined length of F 1 – F 3, with eight mps.

Mesosoma smooth, 1.2 × (1.1–1.3 ×) as long as wide; pronotum (Fig. 1 C) divided mediolongitudinally, with four setae on each side along the anterior margin; mesoscutum (Fig. 1 C) 0.5 × (0.5–0.6 ×) as long as wide, longer than scutellum; scutellum (Fig. 1 C) 0.6 × (0.5–0.6 ×) as long as wide, with a frenal row of foveae, they are distinctly wider and apparently shallower; propodeum (Fig. 1 C) with a complete median carina shaped posteriorly as an inverted narrow Y-shape. Forewing (Fig. 1 D) 4.1 × (4.1–4.4 ×) as long as wide; disc hyaline, densely setose beyond venation, with discal setae originating behind stigmal vein (Fig. 1 E), many of them 5.3–7.2 μm long; longest marginal seta 1.0 × (0.6–1.0 ×) greatest width of forewing; Hind wing (Fig. 1 F) 28.9 × (27.2–31.4 ×) as long as wide; disc hyaline, with two rows of setae; longest marginal seta 5.8 × (5.6–6.4 ×) greatest width of hind wing.

Metacoxa (Fig. 1 C) smooth, in lateral view a little longer than petiole. Petiole (Fig. 1 C) 1.3 × (1.3–1.5 ×) as long as wide, in dorsal view with inconspicuous vertical striations and expanded basally. Ovipositor (Fig. 1 G) 1.0 × (1.0–1.1 ×) as long as gaster, slightly exserted by ~ 0.1 × its own total length beyond gastral apex; ovipositor 1.7 × (1.5–1.8 ×) length of mesotibia and 1.5 × (1.3–1.5 ×) length of metatibia.

Measurements of the holotype (μm). Head height: width: 60: 101; mesosoma (in dorsal view) length: width: 115: 95; mesoscutum length: width: 41: 77; scutellum length: width: 30: 53; median carina length: 29; petiole length: width: 28: 22; gaster length: width: 130: 90; ovipositor length: 136; exserted part of ovipositor: 13; antennal segments length: width: scape: 26: 15; pedicel: 25: 12; F 1: 11: 5; F 2: 18: 6; F 3: 11: 6; F 4: 13: 7; F 5: 12: 7; F 6: 18: 8; clava: 56: 17; forewing length: width: 274: 66; longest marginal seta length: 65; discal setae length: 5–7; hind wing length: width: 231: 8; longest marginal seta length: 46; mesotibia length: 79; metatibia length: 89.

Male. Unknown.

Hosts.

Unknown.

Etymology.

The new species is a noun in apposition meaning “ a short scape ” in Latin.

Distribution.

China (Xinjiang).

Comments.

In this new species, the scape is approximately as long as the pedicel, thus distinguishing it from most species within the subgenus in which the scape is usually longer than pedicel. The unique combination of the posterior margin of the scutellum with a frenal row of foveae that are distinctly wider and apparently shallower and the median carina being complete, forming an inverted Y-shape, separates it from all the other described species in the subgenus.