Taxonomic notes on Stemmops O. Pickard-Cambridge, 1894 (Araneae, Theridiidae) of China Author Li, Fengyuan https://orcid.org/0000-0001-9437-5732 State Key Laboratory of Protein and Plant Gene Research, School of Life Sciences, Peking University, Beijing 100871, China Author Lin, Yejie https://orcid.org/0000-0002-6789-2731 Hebei Key Laboratory of Animal Diversity, College of Life Science, Langfang Normal University, Langfang 065000, China linyejie15@gmail.com Author Gao, Fan https://orcid.org/0000-0001-8105-1261 Nanjing University, Nanjing 210023, China Author Yao, Yanbin Jinshan College of Fujian Agriculture and Forestry University, Fuzhou 350002, China Author Li, Shuqiang https://orcid.org/0000-0002-3290-5416 Institute of Zoology, Chinese Academy of sciences, Beijing 100101, China text Biodiversity Data Journal 2023 2023-06-26 11 106208 106208 http://dx.doi.org/10.3897/BDJ.11.e106208 journal article http://dx.doi.org/10.3897/BDJ.11.e106208 1314-2828-11-e106208 94CC9039AF0C40F3AE7848E73524F4FE 5C08C069B8715823B7638B8B6141339A Stemmops atratus Lin & S. Li sp. nov. Materials Type status: Holotype . Occurrence : catalogNumber: IZCAS-Ar44589 ; recordedBy: Fan Gao ; individualCount: 1 ; sex: female ; lifeStage: adult ; occurrenceID: 6D0CB4BA-4B57-5C31-B87A-75A9CEE400FB ; Taxon : scientificName: Stemmops atratus; Location : country: China ; stateProvince: Jiangsu ; locality: Nanjing City , Xuanwu District , Zhongshan ; verbatimElevation: 74 m ; decimalLatitude: 32.078 ; decimalLongitude: 118.837 ; Identification: identifiedBy: Yejie Lin ; dateIdentified: 2023; Event: year: 2019; month: 6; day: 18 Type status: Paratype . Occurrence : catalogNumber: IZCAS-Ar44590 ; recordedBy: Fan Gao ; individualCount: 1 ; sex: female ; lifeStage: adult ; occurrenceID: CF399303-716E-594B-B4B7-89A38315A649 ; Taxon : scientificName: Stemmops atratus; Location : country: China ; stateProvince: Jiangsu ; locality: Nanjing City , Xuanwu District , Zhongshan ; verbatimElevation: 74 m ; decimalLatitude: 32.078 ; decimalLongitude: 118.837 ; Identification: identifiedBy: Yejie Lin ; dateIdentified: 2023; Event: year: 2019; month: 6; day: 18 Description Female. Total length 2.85; carapace 0.94 long, 0.77 wide, opisthosoma 1.93 long, 1.45 wide. Eye sizes and interdistances: AME 0.05, ALE 0.06, PME 0.06, PLE 0.05, AME-AME 0.02, AME-ALE 0, PME-PME 0.02, PME-PLE 0.02, AME-PME 0.05, ALE-PLE 0.01. Endites almost as long as wide. Leg measurements: I 3.69 (1.05, 1.27, 0.80, 0.57), II 2.77 (0.79, 0.91, 0.55, 0.52), III 2.59 (0.74, 0.78, 0.51, 0.56), IV 3.93 (1.09, 1.26, 0.89, 0.69). Colouration (Fig. 1 a , Fig. 10 a ). Carapace dark-brown, covered with long sparse brown setae, eyes with black rings. Endites and labium green-brown. Sternum green-brown. Legs orange-brown, covered with sparse setae, more distinct on metatarsi and tarsi. Opisthosoma with two large white spots anteriorly and posteriorly, three pairs of small white symmetrical spots along the mid-line and a pair of white spots laterally, slightly larger than the small white spot in the middle. Spinnerets black. Epigyne (Fig. 2 A and B). Epigynal plate almost as long as wide, with hood anteriorly, hood almost six times wider than long. Copulatory openings located on posterior portion of epigyne. First half of copulatory ducts slightly curved and second half coils around the middle of the spermathecae for four turns. Spermathecae kidney-shaped. Fertilisation ducts kidney-shaped. Male. Unknown. Diagnosis The female of this new species is similar to that of S. nipponicus Yaginuma, 1969 by the split atrium (Fig. 2 A). However, it can be distinguished by the presence of hood (Fig. 2 A) (vs. absent) and the copulatory ducts coiled four times around the spermathecae (Fig. 2 B) (vs. once in S. nipponicus ). Furthermore, it differs by its habitus: S. atratus sp. n. lacks obscure yellow spots on the lateral view of opisthosoma (Fig. 1 a , Fig. 10 a Right) [vs. present in S. nipponicus , Yaginuma (1969) (Fig. 1 d )]. Etymology The specific epithet is derived from the Latin word atratus , meaning darkened, referring to the colour of the new species. Distribution China (Jiangsu, Zhejiang) (Fig. 11 ). Biology All specimens were collected under stones. Notes The dark venter of opisthosoma and epigynal hood indicate that the illustrated female of S. nipponicus in Jin (2018) is misidentified. Herein, we determine this species as S. atratus sp. n. Compared species and material examined. Stemmops nipponicus , 10♂10♀, CHINA: Beijing : Chaoyang District, Olympic Forest Park, 40.0108°N , 101.2820°E , elevation 40 m, 7.VI.2022, Yejie Lin & Yunxiao Shen leg.