JHR 95: 113-127 (2023) or JOURNAL OF A peer-reviewed open-access Journal doi: 10.3897 /hr.95.96903 RESEARCH ARTICLE () Hymenoptera The International Society of Hymenopterists RESEARCH https://jhr.pensoft.net Key to the species of the genus Subancistrocerus de Saussure, 1855 (Hymenoptera, Vespidae, Eumeninae) from China with description of a new species iang-Li Tan'?, Meng Wang!?, Honeli Xu'?, Yan Taneg!*, Ying Liu! g g 8 8 g g I Shaanxi Key Laboratory for Animal Conservation, Ministry of Education, College of Life Sciences, Northwest University, Xian, China 2 Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, Xian, China Corresponding author: Jiang-Li Tan (tanjl@nwu.edu.cn) Academic editor: Michael Ohl | Received 31 October 2022 | Accepted 16 January 2023 | Published 17 February 2023 https://z00bank.org/EC5 9F6B7-60A4-4D3E-B5 DA-COAEE2 174300 Citation: Tan J-L, Wang M, Xu H, Tang Y, Liu Y (2023) Key to the species of the genus Swbancistrocerus de Saussure, 1855 (Hymenoptera, Vespidae, Eumeninae) from China with description of a new species. Journal of Hymenoptera Research 95: 113-127. https://doi.org/10.3897/jhr.95.96903 Abstract A newly discovered species, Subancistrocerus clypeatus sp. nov., from China (Zhejiang) is described and illustrated. In addition, Subancistrocerus kankauensis (Schulthess-Rechberg) is redescribed and photo- graphed after studying the type series. A key to the genus Subancistrocerus de Saussure, 1855 from China is presented. The distribution of this genus is briefly discussed. Keywords China, key, new species, redescription Introduction The small genus Subancistrocerus de Saussure, 1855, belonging to the subfamily Eu- meninae (Hymenoptera: Vespidae), consists of 33 extant species and subspecies up to date, but mainly found in Oriental Region with 27 species and subspecies (Giordani Soika 1994; Gusenleitner 2000; Carpenter et al. 2010; Kumar 2013; Li and Chen 2014). Among them, most species are scattered in the Pacific Island countries such as Philippines, Indonesia, Malaysia, Palau etc. This genus can be easily recognized by the Copyright Jiang-LiTan et al. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. 114 Jiang-Li Tan et al. / Journal of Hymenoptera Research 95: 113-127 (2023) characteristics as follows: small sized body, a pair of indistinct cephalic fovea, anterior face of pronotum with two separated foveae medially, a pair of prescutellar longitudinal grooves, tegula broad, smooth and shiny, tergum 1 (T1) wider than long in dorsal view with two transverse carinae close each other at crest of declivity. Giordani Soika (1994) included a key to the species of Subancistrocerus from the Oriental region and the junc- ture area with the Australian region in his revision together with a few line-drawings. However, the taxonomic research on the genus is quite complicated because of lack- ing figures and the limited illustrated characters. Schulthess-Rechberg (1934) reported the first species of Subancistrocerus named S. kankauensis from China (Taiwan) in the key with a limited description mostly about color pattern and without any figures. Although few species were reported mainly separated on basis of comparation with S. kankauensis (Giordani Soika 1994; Gusenleitner 2000; Li and Chen 2014), the illus- tration on S. kankauensis is still poor up to date. Yeh and Lu (2007) recorded the second species also from China (Taiwan) with a color photo of the habitus of S. sichelii. Kumar (2013) provided few pictures when reporting three species from India. Subsequently, Li and Chen (2014) recorded five species in China, however, only with pictures and descriptions on the two new species. Herein, we redescribe S. Rankauensis (Schulthess- Rechberg, 1934) after checking the types preserved in SDEI (Miincheberg, Germany), and report a new species discovered from Zhejiang, China. A key to the species of this genus from China is provided. The distribution pattern of the genus is briefly discussed. Materials and methods Observations, descriptions and photographic images were made with an Opto-Edu A230903 stereomicroscope and a fluorescent lamp or with the Keyence VHX-5000 digital microscope and processed with Adobe Photoshop CS5, mostly to adjust the size and background. For the identification of the genus, Tan et al. (2018) and Giordani Soika (1994) were used. The research specimens are deposited in the collections of the College of Life Sciences, Northwest University, Xi'an, Shaanxi, China (NWUX) and the Senckenberg Deutsches Entomologisches Institut, Miincheberg (SDET). A key to the species of the genus Subancistrocerus de Saussure from China 1 Forewing without a brown cloudy patch along the costal margin; tergum 1 longer, at most 1.4x wider than long in dorsal view; black, with white or pale-yellow patches and bands. Male: Basal tarsomere of the mid-leg straight, cylindrical and long, almost 7x longer than wide. [widely spread in Oriental and present in Afrotropical region; China (Sichuan, Yunnan, Taiwan)]......... fee PR eter oh Ne VL ie. RI Merce PientD. Che 3 een eR S. sichelii (de Saussure) - Forewing with a brown cloudy patch along the costal margin; black with pre- dominantly brownish yellow patches and bands; tergum 1, about 1.5x wider Key to Chinese Subancistrocerus with a new species 115 than long. Male: Basal tarsomere of the mid-leg of relatively short, arched and depressed at most >.0xoncen thaty Wie iit aval eaty aladdin eee 2 Tergum 2 densely punctate with large and coarse punctations; at least basally and laterally punctures almost as wide as those of the pronotum or meso- scutum. Male: The large antennal concavity begins in antennal article A10 or Tergum 2 finely punctate with small and sparse punctures, much smaller than those on the pronotum or meso-scutum. Male: The large antennal concavity begins in A8. [distributed in Oriental region; China (Sichuan, Chongqing, MiMIUIN Ata) lec ceeat cae ansthetse Medan eae ate banter, mans, Sods S. camicrus (Cameron) Apical band of T3 as wide as T1. Clypeus of female entirely yellow except margin, without black spots; apical margin weakly emarginate (nearly trun- cate). Male: Apical margin of clypeus truncate; only antennal articles All and A12 largely and very deeply concave. [China (Jiangxi, Taiwan)]............. ee Bt Re POR er or LE ae arte Pen oS S. kankauensis (Schulthess-Rechberg) Apical yellow band of T3 much narrower than T1 or absent. Clypeus of fe- male with a black spot medially, apical margin emarginate. Male: Apical mar- gin of clypeus emarginated; antennal article begins in antennal article A10 or Female: Clypeus medially with wider and rounder longitudinal depression. Male: Antennal articles A10 to Al2 concave, Al3 gradually sharper apically, slightly curved finger shaped, about 2.1x as long as wide, with its apex reach- ing base of A10. Fore femur normal basally; basal tarsomere of midleg much shorter than following segments together, about 2.7x as long as wide. [China CVG a fi) | See See ee, enn, Cen ere, Se S. jinghongensis Li & Chen Female: Clypeus medially with narrower longitudinal depression. Male: An- tennal articles Al1— A12 deeply concave; Al3 roughly oval shaped, 1.7x as long as wide, with its apex reaching base of All. Fore femur depressed ba- sally; basal tarsomere of midleg about 5x as long as Wide ...... eee eeeeeeeeeee 5 Apical yellow band of T1 gradually narrowed towards lateral sides; apical yel- low band of T3 absent; pronotal spots relatively large, triangular and con- tiguous; clypeus of female wider than long, mainly yellow, with two roughly longitudinal carinae sub-medially, and with an irregular black spot medially; Male: Clypeus as wide as long; all tibiae black, at most with a whitish yellow ellipticspot«(Chinas@¥anitiai),| 6 .cto.