Pediobius elongatus Cao & Zhu, sp. n.
Creators: name: Cao, Huan-Xi
name: Salle, John La
name: Zhu, Chao-Dong
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Eulophidae
Pediobius
Pediobius elongatus

description: 2. Pediobius elongatus Cao & Zhu, sp. n.
(Figs 2, 33 b)
Diagnosis. Scutellum with two deep sublateral grooves that join posteriorly to form a U-shaped groove (Figs 2 a, 2c); reticulate inside and striate outside the U-shaped groove. Petiole with one seta on each side. Gaster elongate, much longer than mesosoma, and longer than total length of mesosoma plus head; Gt6 and Gt7 distinctly elongate (Figs 2 a, 2c–d), Gt6 about 1.6× as broad as long and Gt7 1.4× as long as broad respectively, and Gt1 very short, occupying approximately 1/5 length of gaster. Fore wing with an infuscate area below STV (Fig. 2 f).
Female. Body length 2.8–3.1mm. Body large, elongate and strikingly slender.
Body metallic green with coppery reflections. Face with metallic green reflections. Scape and pedicel metallic green, funicle with metallic green reflections. Legs with coxae, femora and tibiae metallic green; first three tarsomeres usually white and apical tarsomere dark, though sometimes basal three tarsomeres infuscate (Figs 2 g–i); metatibial spur white.
Antenna with 3-segmented funicle and 2-segmented clava, and funicle clearly separated from clava (Fig. 2 e). Scape not reaching median ocellus. Pedicel longer than broad, shorter than F1 and nearly as broad as F1. Flagellum setose; funicular segments longer than broad, subequal in width and decreasing slightly in length; C1 much longer than broad, C2 much narrower than C1 and with a distinct terminal spine. Relative measurements of scape: pedicel: F1: F2: F3: C1: C2 = 2.2: 0.8: 1.2: 1.0: 0.8: 0.6: 0.4. Face reticulate above toruli, and weakly sculptured below toruli. Toruli inserted slightly above lower margin of eyes. Scrobal grooves extending separately to and nearly meeting at frontofacial sutures. Interscrobal space slightly raised. Frontofacial sutures diverging at an obtuse angle of about 110° (Fig. 33 b).
Head in dorsal view strongly transverse, more than 3× as broad as long (6.0: 1.6). Vertex with long setae, distinctly reticulate. Frons and occiput slightly emarginate, and median length of vertex short. Ocelli arranged in an obtuse-angle triangle. POL longer than OOL (1.0: 0.6). Occiput only weakly margined between the posterior ocelli, with a long seta on each side of occipital carina (Fig. 2 a).
Pronotal collar smooth, and with anterior carina. Mesoscutum finely reticulate; both pairs of setae very long and the posterior pair situated on MLM. Notauli distinct and in posterior two-thirds merging to groove-like inner margins of deep, broad and smooth notaular depressions. Posterior margin of MLM emarginate slightly, separated from base of scutellum by a distinct, narrow, semicircular hole. Axilla superficially reticulate. Scutellum distinctly longer than broad (3.4: 2.6), distinctly narrowed anteriorly; convex with two deep sublateral grooves joining posteriorly to form a U-shaped groove, distinctly reticulate inside and striate outside the U-shaped groove, but smooth near the posterior margin (Figs 2 a, 2c); setae on scutellum very long, as long as those on MLM. Dorsellum large, with two large, irregularly sculptured lateral foveae that resemble a pair of U-shaped carinae forming two depressed submedian areas that polished between two lateral foveae; distinctly protruding in an obtuse angle apically. Propodeum with submedian carinae fused in anterior third and distinctly raised to form a crest against dorsellum, but strongly diverging straight backward in posterior two-thirds; submedian area longer than broad (7: 5), polished, with depressions distinct along anterior margin, with postero-lateral corners protruding in slightly obtuse angle above hind coxa (Fig. 2 c); plicae subparallel; callus with 6 setae. Lateral panel of pronotum and prepectus reticulate; acropleuron, mesepisternum and mesepismeron polished; transepimeral sulcus, pleural suture and transepisternal sulcus distinct; transepimeral sulcus curved (Fig. 2 b).
Petiole transverse, with one seta on each side, and distinctly reticulate with strongly raised transverse ridges. Gaster strongly acute apically and elongate, much longer than total length of head plus mesosoma, more than 2× as long as broad (6.0: 2.5); Gt1 occupying about 1/5 length of gaster, smooth, with posterior margin protruding slightly apically and converging at sides (Fig. 2 a); Gt6 and Gt7 distinctly elongate, occupying about 1/5 and 1/4 length of gaster respectively, with Gt6 about 1.6× as broad as long, and Gt7 about 1.4× as long as broad (Figs 2 a, 2c).
Fore wing setose, with a large infuscate area below STV (Fig. 2 f); speculum small and closed below; PMV long, slightly longer than STV. Relative measurements of SMV: MV: PMV: STV = 2.8: 6.8: 1.2: 0.8. Metatibial spur straight, very short, almost as long as the width of tibia, not reaching apex of basal tarsomere (Fig. 2 i).
Male. Unknown.
Etymology. This species in named for its strikingly slender body, especially the elongate gaster, from Latin elongatus = elongate.
Material examined. Holotype ♀, CHINA, Yunnan, Lijiang, Yulong Snow Mountains, 23.V.2013, coll. Yan- Hui Zhao (IZCAS). Paratypes: 1♀, same data as the holotype; 2♀, CHINA, Guangxi, Guilin, Xing-An, Mao-Er Mountains, V.2013, coll. Kan Wang (IZCAS).
Biology. Unknown.
Distribution. CHINA, Guangxi, Yunnan.
Remarks. This species is characterized by its unusually elongate gaster, Gt 6–7 in particular. Besides, it differs from P. alcaeus by the following characters: scutellum with the area inside the U-shaped groove reticulate rather than smooth; fore wing with an infuscate area below STV; and petiole with one seta on each side (see also remarks under P. bisulcatus).
description: Published as part of Cao, Huan-Xi, Salle, John La & Zhu, Chao-Dong, 2017, Chinese species of Pediobius Walker (Hymenoptera: Eulophidae), pp. 1-71 in Zootaxa 4240 (1) on pages 13-15, DOI: 10.5281/zenodo.375759