Siobla jiangi Niu & Wei, sp. nov.
Creators: name: Niu, Gengyun
name: Wei, Meicai
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Tenthredinidae
Siobla
Siobla jiangi

description: Siobla jiangi Niu & Wei, sp. nov.
(Figs 2 a, 2b, 4i, 4j, 8g –i, 8m, 9m, 9z, 10k, 10l)
Description. Holotype: ♀. Length, 13.5 mm (Figs 2 a, 4i). Black, palpi, middle of labrum, spot on dorsum of 1st antennomere, anterior margin of 2nd antennomere, posterior margin of pronotum (greatest width 0.9 × length of lateral ocellus), spot on anterior of tegula, and spot on middle of mesepimeron pale brown, 2nd and 3rd abdominal tergites entirely, and anterior half of 4th tergite, 2nd to 4th sternites entirely yellowish brown, middle of lateral edges of 8th tergite, most of 10th tergite, cerci, and posterior margin of sheath pale brown; legs yellowish brown with following black: fore and middle coxae entirely, most of hind coxa, most of fore and of middle trochanters, venter of basal half of fore and of middle femurs, and apical half of hind femur; hairs on dorsum of body pale brown, hairs on pleuron silver; wings uniformly infuscated, pterostigma, vein C, anterior side of vein Sc+R, vein R1 entirely and base of vein A pale brown, other veins black brown.
Head densely punctured, middle of temple and of postocellar area with visible interspaces, narrower than diameter of punctures, microsculptured; clypeus punctured with narrow interspaces, labrum sparsely punctured; prescutum and scutum densely punctured, interspaces narrow, microsculptured; anterior slop of mesoscutellum densely punctured, posterior slope densely and coarsely punctured, without interspaces; posttergite shiny; parapsides with large and sparse punctures and dense microsculpture; metascutellum with anterior slope shiny and posterior slop densely punctured; metapostnotum shiny with margins slightly microsculptured; middle and upper of mesepisternum densely and coarsely punctured, venter with large and shiny interspaces between small and sparse punctures; ventral anterior corner of mesepisternum with a distinct shiny patch; anepimeron coarsely punctured, katepimeron microsculptured, posterior shiny; upper metepisternum densely punctured, mat, and venter sparsely punctured, shiny; basin of metepimeron shiny, margin of basin microsculptured, dorsum of metepimeron with large punctures and posterior corner shiny. First abdominal tergite shiny without microsculpture, lateral edges hardly punctured; 2nd tergite weakly microsculptured, other tergites microsculptured, 4th to 8th tergites punctured.
Hairs on dorsum of head straight, as long as diameter of lateral ocelli. Clypeus flat, anterior margin truncate; malar space as long as transverse diameter of median ocellus; shortest distance between eyes below antennal sockets in front view nearly as long as eye height; middle fovea broad and deep; interocellar furrow deep, postocellar furrow broad and shallow; postocellar area 1.8 × as broad as long, weakly elevated with an obtuse carina; lateral furrows deep, curved, divergent posteriorly; head behind eyes 0.8 × length of eye in dorsal view; curved laterally and then convergent posteriorly; genal carina sharp, complete (Fig. 8 g). Antenna as long as head, thorax and 1st abdominal tergite together, slightly shorter than vein C, 2nd antennomere 1.3 × as long as broad, relative length of 3rd to 4th antennomeres as 1.5, 5th to 8th antennomeres weakly compressed, inner and outer sides of 5th to 8th antennomeres with weak furrows, 7th antennomere 2 × as long as broad. Middle furrow of prescutum shallow (Fig. 8 m); mesoscutellum elevated, hardly higher than scutum. Metabasitarsus 5.3 × as long as broad, about 1.2 × length of following 3 tarsomeres combined, hind inner tibial spur 0.5 × length of metabasitarsus. Pulvilli of hind tarsus weakly developed, 1st pulvillus 0.5 × basal breadth and 0.3 × apical breadth of metabasitarsus, distance between basal two pulvilli 2 × length of 2nd pulvillus. Ovipositor sheath as long as hind femur, and 1.1 × length of middle tibia in lateral view, exposed part of apical sheath about 1.4 × as long as broad, apical sheath 1.5 × as long as basal sheath. Lancet with 22 serrulae, (Fig. 9 m), middle serrulae each with 6–8 distal fine teeth (Fig. 9 z).
Male. Length, 11.5 mm (Figs 2 b, 4j). Similar to female in structure and color, but entire 3rd abdominal tergite, most of 4th tergite, and most of 6th sternite yellowish brown, 7th to 9th sternites entirely black, pale posterior margin of pronotum nearly absent, antenna and tegula entirely black, mesepimeron without pale spot, apical 0.2 of hind tibia black; malar space line linear, 0.2 × transverse diameter of median ocellus (Fig. 8 i); head in front view with lower interocular distance 0.8 × eye height; head behind eyes 0.5 × eyes in length in dorsal view, narrowing posteriorly; hairs on dorsum of head 1.2 × lateral ocelli (Fig. 8 h); genitalia as in Figs 10 k, 10l.
Variation. The inner side of the apex of hind tibia is sometimes with a black spot.
Etymology. This species is named after the surname of Dr. Jiang Jigang. He collected many valuable sawfly specimens from Mt. Shennongjia, Hubei, China.
Specimens examined. 8♀, 27♂. Hubei: Holotype: 1♀, Qianjiaping, Shennongjia, E.110º24.023´, N.31º24.356´, 1789m, 2009-VII-4, Zhao Fu leg CSCSHT 0 0 810021 (CSCS); Paratypes: 1♀ 2♂, Yaolangou, Shennongjia, E.110º22.878´, N.31º29.104´, 1430m, 2009-VII-13, Zhao Fu leg.; 3♂, Yinyuhe, Shennongjia, E.110º18.799´, N.31º29.821´, 2046m, 2008-VII-29, Zhao Fu leg.; 4♀ 11♂, Qianjiaping, Shennongjia, E.110º24.023´, N.31º24.356´, 1789m, 2009-VII-3–7, Zhao Fu and Jiao Zhao leg.; 10♂, Zhangbaohe, Shennongjia, E.110º24.570´, N.31º26.765´, 1156m, 2009-VI-12–13, Zhao Fu leg.; 1♀, Shennongjia, 1985-VI-24, Mao Xiaoyuan leg.; 1♂, Yaozikou, Shennongjia, Yichang, E.110º20.986′, N.31º30.104′, 1920m, 2011. VII.21, Wei Meicai & Niu Gengyun leg.; CSCS-Hym-M00680; 1♀ 1♂, Qianjiaping, Shennongjia, E.110º24.023´, N.31º24.356´, 1789m, 2009-VII-4–6, Zhao Fu and Jiao Zhao leg. (USNM).
Distribution. China (Hubei).
Remarks. This new species is similar to S. zuoae, but differs from it in the forewings distinctly infuscate; tegula and the base of fore and middle femora black; the abdominal tergite 4 largely yellow brown; the metepimeron with a central pale brown spot; the interspaces between punctures on mesonotum distinctly narrower than diameter of a puncture; the ovipositor sheath as long as hind femur; lancet very long and slender with 21 serrulae, the middle serrulae each with 5–6 distal teeth; the valviceps of penis valve broad and elliptical. The lancet of this new species is distinctly longer than other species in this group (Fig 9 l).
description: Published as part of Niu, Gengyun & Wei, Meicai, 2013, Revision of the Siobla formosana group (Hymenoptera: Tenthredinidae), pp. 41-68 in Zootaxa 3746 (1) on pages 48-49, DOI: 10.11646/zootaxa.3746.1.2, http://zenodo.org/record/285307