Simonia gen. nov., a new spider genus (Araneae, Theridiosomatidae) from Southeast Asia Author Zhang, Jianshuang https://orcid.org/0000-0003-4010-3082 School of Life Sciences, Guizhou Normal University, Guiyang, Guizhou 550025, China Author Yu, Hao https://orcid.org/0000-0002-9113-2425 School of Life Sciences, Guizhou Normal University, Guiyang, Guizhou 550025, China Author Lin, Yucheng https://orcid.org/0000-0002-5054-0633 Key Laboratory of Bio-resources and Eco-environment (Ministry of Education), College of Life Sciences, Sichuan University, Chengdu, Sichuan 610064, China linyucheng@scu.edu.cn text ZooKeys 2023 2023-11-30 1185 277 294 http://dx.doi.org/10.3897/zookeys.1185.104120 journal article http://dx.doi.org/10.3897/zookeys.1185.104120 1313-2970-1185-277 912F2D3B2DD24771A895FDD7B1443511 337CDF6D1F90587495D1E8C94581B3B5 Simonia sumatra Yu & Lin sp. nov. Figs 6 , 7 Type material. Holotype ♀ and paratype 1♀ (IZCAS), Indonesia : West Sumatra Prov., Kab Agam Co., Kecamatan Matur district, 0°15.739'S , 100°18.491'E , 01.XII.2013, H. Zhao leg. Paratypes 1♀ and 1juv. (NHMSU), West Sumatra Prov., Kab Agam Co., Simarasok Vill., Cua Luwuang, 0°14.902'S , 100°28.993'E , 710 m, 11.I.2014, H. Zhao leg. Etymology. The species name is derived from the type locality; noun in apposition. Diagnosis. The female of the new species resembles those of S. youyiensis in having similar habitus and general appearance of the epigyne (cf. Fig. 6 and Fig. 4C-G ), but can be easily distinguished by 1) anterior margin of epigynal plate concaved c. 120° (vs c. 140°) (cf. Fig. 6C, D and Fig. 4E, F ), 2) spermathecae shaped like the whole hind leg of a frog, consisting of head, stalk and base (vs comma-shaped, only with head and stalk) (cf. Fig. 6E and Fig. 4G ), and 3) bursae egg-shaped (vs spherical) (cf. Fig. 6E and Fig. 4G ). Description. Female (Fig. 6A, B ): Carapace brownish posteriorly, distinctly darker anteriorly and marginally, with distinct pattern on pars cephalica consisting of pair of dark lateral bands and Ψ-shaped markings behind posterior eyes, markings starting from behind PME and PLE almost reaching dark fovea. AER distinctly recurved, PER distinctly recurved in dorsal view. Sternum uniformly black. Mouthparts coloured as sternum. Legs uniformly yellowish white. Abdomen round, covered with sparse long setae; dorsum basically black, centrally with 2 pairs of muscular depressions, anteriorly with pair of large, nearly fan-shaped patches, posteriorly with pair of √-shaped band; venter slightly darker than dorsum, without distinct pattern. Measurements : Total length 2.28. Carapace 0.96 long, 0.88 wide. Clypeus 0.22 high. Sternum 0.48 long, 0.50 wide. Abdomen 1.56 long, 1.28 wide. Length of legs: I 2.71 (1.02, 0.33, 0.57, 0.51, 0.28); II 2.42 (0.83, 0.27, 0.52, 0.49, 0.31); III 1.74 (0.48, 0.21, 0.41, 0.41, 0.23); IV 2.29 (0.91, 0.27, 0.42, 0.41, 0.28). Epigyne (Fig. 6E-G ). Epigynal plate c. 1.2 x wider than long, anteriorly concaved by c. 120°. Scape (Sc) spoon-shaped, small, about 1/6 length of epigynal plate. Spermathecae (Sp) shaped like the whole hind leg of a frog, with bean-shaped head (SH), conical stalk (SS) and distinctly narrowed base (SB); anterior surface of spermathecae touching anterior margin of epigynal plate; spermathecal stalks and bases extending obliquely, widely separated by c. 1/2 width of epigynal plate. Bursae (CB) egg-shaped. Distribution. Known only from the type locality, West Sumatra, Indonesia (Fig. 7 ).