Siobla villosa Malaise, 1931

Niu, Gengyun & Wei, Meicai, 2021, Review of some Siobla (Hymenoptera: Tenthredinidae) species, Zoological Systematics 46 (3), pp. 208-224 : 212-215

Siobla villosa Malaise, 1931 ( Figs 7–9 )

Siobla villosa Malaise, 1931: 122 .

Siobla rufoscapa Wei, 2002: 119–120 . Type locality: Henan, China. syn. nov.

Diagnosis. Body robust; malar space of female as long as the diameter of middle ocellus; punctures on temple without interspaces; marginal carina of postocellar area slightly higher than lateral occipital carina; interspace between punctures on the middle of venter of mesepimeron polished, without microsculptures; apical serrulae blunt and annular sutures strongly oblique; sheath as long as middle tibia, lateral breadth of sheath narrower than apical breadth of hind tibia; apical sheath 1.5 times as long as basal sheath; male malar space 0.2 times diameter of ocellus and pterostigma brown.

Distribution. China (Gansu (Baishuijiang), Shaanxi (Foping, Meixian), Henan (Songxian), Hubei (Xingshan)).

Primary type examined. 1♂, holotype of Siobla villosa (NRHS) : “Pei-Lung-Kiang, 750–850 m, 14/6, 30. Hummel ”; “ Kina, S. Kansu ”; “ Sven Hedins, Exp. Ctr. Asien, Dr Hummel ”; “ Typus ”; “ Siobla villosa n. sp. Malaise det. 1936”. 1♀, holotype of Siobla rufoscapa (CSCS) : “ Mt. Baiyun , Henan, 2001-V-2, 1800 m, Zhong Yihai”; “ Holotype ”; “MorphBank 836764”; “ Siobla rufoscapa Wei, 2002 , Det. Wei M. 2002”; “ Siobla villosa Malaisei, 1931 , Det. Niu G, 2016” .

Other material examined. Henan: 1♂, Mt. Baiyun , Songxian , Henan, 2001-VI-2, 1800 m, Zhong Yihai . Hubei: 1♂, Longmenhe, Mt. Xing , Hubei, 1300 m, 1994-V-8, Yao Jian; 37267 Inst Zool Acad. Sin . Shaanxi: 1♀, Kaitianguan, Mt. Taibai , Meixian , Shaanxi, E.107º51.477′, N.34º0.572′, 1852 m, 2014.VI.7, Wei Meicai; 1♂, Qinvfeng, Mt. Taibai , Meixian , Shaanxi, E.107º49.617′, N.34º0.783′, 2297 m, 2014.VI.8, Qi Liwei, Kang Weinan; 1♀, Kaitianguan, Mt. Taibai , Meixian , Shaanxi, E.107º51.477′, N.34º0.572′, 1852 m, 2014.VI.9, Wei Meicai; 1♀, Tingchechan, Qingfengxia, Taibaixian , Shaanxi, E.107º26.167′, N.34º0.713′, 1792 m, 2014.VI.10, Liu Mengmeng, Liu Ting ; 1♀, Tingchechan, Qingfengxia, Taibaixian , Shaanxi, E.107º26.167′, N.34º0.713′, 1792 m, 2014.VI.10, Wei Meicai; 1♀ 1♂, Liangfengya, Foping , Shaanxi, E.107º51.250′, N.34º41.117′, 2128 m, 2014.VI.17, Wei Meicai; 2♀, Liangfengya, Foping , Shaanxi, E.107º51.250′, N.34º41.117′, 2128 m, 2014.VI.17, Qi Liwei, Kang Weinan ; 1♀, Liangfengya, Foping , Shaanxi, E.107º51.250′, N.34º41.117′, 2128 m, 2014.VI.18, Liu Mengmeng, Liu Ting ; 1♀, Liangfengya, Foping , Shaanxi, E.107º51.250′, N.34º41.117′, 2128 m, 2014.VI.18, Wei Meicai ;

2♀, Liangfengya, Foping , Shaanxi, E.107º51.250′, N.34º41.117′, 2128 m, 2014.VI.18, Qi Liwei, Kang Weinan . 1♀, [ China: Shaanxi], Kaitianguan 2000 m, 34.00N, 107.51 E, Mt. Taibaishan, Qinling Mts. 31.V.–2.VI.2004, A. Shinohara; Exchange NSMT ; 1♂, [ China: Shaanxi], Kaitianguan 2000 m, 34.00N, 107.51 E, Mt. Taibaishan, Qinling Mts. 27.V.2005, A. Shinohara; Exchange NSMT ; 1♂, [ China: Shaanxi], Kaitianguan 2000 m, 34.00N, 107.51 E, Mt. Taibaishan, Qinling Mts. 5.VI.2007, A. Shinohara; Exchange NSMT .

Remarks. Malaise (1931) described " S. villosa n. sp. ” in a key and mentioned that the male type was collected from Sze Tschuan (Sichuan). Malaise (1934) redescribed S. villosa and pointed out that the male type was collected from Pei-lungkiang, a location between Szechuan (Sichuan) and Kansu (Gansu). Malaise (1945) keyed out S. villosa Malaise, 1931 again, and pointed out that the holotype was a male collected from a valley of Peishuio (Baishui River, Wen County, Gansu Province). However, the authors only found one male specimen in the NRHS labeled “Typus” under the name Siobla villosa . Therefore, we believe that this specimen is the name-bearing type, and that Malaise referred the type locality to Sze Tschuan in 1931 should be a lapsus calami. In conclusion, this male specimen is the holotype fixed by the original designation.

The trapezoidal postocellar area, long hairs on head and thorax, microsculptures on mesepimeron, punctures on scutum and mesoscutellum in types of S. rufoscapa Wei, 2002 (only female known) and S. villosa Malaise, 1931 (only male known) show that they are two sexes of a single species. Moreover, more specimens, which collected together in both sexes among 2001 to 2014, confirmed the conclusion. So S. rufoscapa Wei, 2002 is treated as a new synonym of S. villosa Malaise, 1931 here.

Figures

Figure 7. Siobla villosa Malaise, 1931. a–d. Holotype of S. villosa Malaise, 1931, ♂. a. Dorsal view; b–c. Lateral view; d. Labels. e–g. Holotype of S. rufoscapa Wei, 2002, ♀. e. Dorsal view; f. Lateral view; g. Labels. Scale bars =1mm.

Figure 8. Siobla villosa Malaise, 1931. a–b. Head in dorsal view. c–d. Head in lateral view. e–f. Hind tarsi. a, c, e. Holotype of S. rufoscapa Wei, 2002, ♀. b, d, f. Nontype, ♂. Scale bars=1 mm.

Figure 9. Siobla villosa Malaise, 1931. a–b. Thorax in lateral view. c–d. Thorax in dorsal view. a, c. Holotype of S. rufoscapa Wei, 2002, ♀. b, d. Nontype, ♂. Scale bars=1mm.