Lasioglossum (Sudila) semiruginosum Zhang et Zhu,

Zhang, Rui, Li, Qiang, Niu, Ze-Qing & Zhu, Chao-Dong, 2011, A newly recorded Subgenus Sudila from China with description of two new species (Hymenoptera: Halictidae: Lasioglossum), Zootaxa 2937, pp. 31-36: 34-36

publication ID

http://doi.org/ 10.5281/zenodo.203940

persistent identifier

http://treatment.plazi.org/id/285C87D3-FFB6-FFFF-EBC4-FCB3FC953D70

treatment provided by

Plazi

scientific name

Lasioglossum (Sudila) semiruginosum Zhang et Zhu
status

sp. nov.

Lasioglossum (Sudila) semiruginosum Zhang et Zhu  , sp. nov.

( Figs. 9–14View FIGURES 9 – 14)

Diagnosis. This species can be distinguished from all other Sudila species by the following combination of characters: body black; hairs very sparse; sculpture coarse, especially on mesoscutum; genal margin round, eye a trifle wider than genal; basal 1 / 2 of propodeal dorsum with longitudinal ridges.

Description. Female. BL= 6.5 mm. Body black without metallic tint; apical of mandible, wing vein dark brown; tegula, tarsus except basitarsus brown; tibial spur fawn; wing brown and transparent. Hairs whitish and sparse; apical of clypeus with a raw simple, pale yellow brown bristles; eye with glabrous hairs; tibia, basitarsus and apical of T 5 with yellowish brown hairs; scopa well developed.

Head nearly as long as wide. Labrum with basal tubercle. Clypeus anterior margin truncate; clypeal tooth mild, anterior with fastigiated punctures become longitudinal furrows; punctures on supraclypeal area coarse, IS= 1; sculptures on ocellocular area disɭΓibuɭed uneven, IS= 0.5–2; punctures on frons area coarse, IS= 0.25; frontal carina distinct, upward exceeding the anterior ocellus lower margin; inner upper margin of eyes concave, lower convergent; scape attaining the lateral ocellus. Frontal view of head as in Fig. 9View FIGURES 9 – 14. seen laterally, gena margin round ( Fig. 10View FIGURES 9 – 14), EW: GW= 9: 8, with longitudinally striate; HL: HW= 66: 67; IOD: OOD: Od: OCD= 11: 13: 7: 6; UOD: MOD: LOD= 49: 54: 37; scape L: pedicel L: F 1 L: F 2 L: F 3 L: F 4 L: F 5 L: F 6 L: F 7 L: F 8 L: F 9 L: F 10 L= 33: 6: 5: 2: 3: 4: 5: 5: 6: 6: 7: 9; F 2 L: F 2 W= 3: 7. Antenna as in Fig. 11View FIGURES 9 – 14.

Mesoscutum and scutellum with coarse punctures, IS= 1–2 ( Fig. 15View FIGURES 15 B); medianmesoscutal line and parapsidal line distinct; mesepisternum finely granular, upper area with transverse striation, lower area with a mild but characteristic tubercle ( Fig. 12View FIGURES 9 – 14); metepisternum, lateral surface of propodeum with transverse striation; propodeal dorsum truncate apically, basal 1 / 2 with longitudinal ridges as in Fig. 13View FIGURES 9 – 14 and Fig. 15View FIGURES 15 D; not separated with carina from lateral and posterior surface; MCL: MTL: PDL= 32: 13: 15.

WL= 5.5 mm. Fore wing with veins 1 r-m, 2 r-m, 2 m-Cu and M-b narrower than Rs-a and M-a; 2 m-Cu and M-b narrower than 1 r-m; hamuli arranged in 2 - 1-2.

Basitibial plate elongate oval, apically pointed; inner hind tibial spur with 5 distinct, fastigiated, pectinate teeth ( Fig. 14View FIGURES 9 – 14).

Metasoma elongate oval. Posterior areas of T 1 –T 5 straightforwards, the wrinkle not obvious. T 1 fine and sparsely punctures on anterior area nearly smooth, middle area IS= 2; T 2, T 3 and T 4 IS= 2–3, anterior area coarser than posterior areas; T 5 IS= 1; T 6 hidden in T 5 below, with U-shaped pygidial plate; sting L= 0.35 mm.

Male. Unknown.

Type material. Holotype, Ƥ, China, Hainan, Baisha County, Nankai Down, 19 ° 13 ʹN 109 ° 42 ʹE, 249m, 21 November 2008, Rui Zhang. Paratypes, 1 Ƥ, China, Hainan, Ledong County, Jianfeng Mountain, 18 ° 74 ʹN 108 ° 86 ʹE, 828m, 20 May 2009, Rui Zhang; 1 Ƥ, China, Hainan, Baisha County, Hongkan Damsite, 19 °08ʹN 109 ° 50 ʹE, 516m, 18 November 2008, Rui Zhang; 1 Ƥ, China, Hainan, Ledong County, Jianfeng Mountain, 18 ° 74 ʹN 108 ° 86 ʹE, 828m, 21 May 2009, Rui Zhang.

Type series were deposited in the Insect Collections of Institute of Zoology, Chinese Academy of Sciences, Beijing, China.

Distribution. China (Hainan)

Etymology. The name semiruginosum  is derived from the Latin semi- (= semi-) and Latin ruginosum (= ridges), basal 1 / 2 of propodeal dorsum with longitudinal ridges.

MOD

University of Modena and Reggio Emilia, Department of Biology