A review of Crassignatha (Araneae, Symphytognathidae) Author Li, Ya Key Laboratory of Bio-resources and Eco-environment (Ministry of Education), College of Life Sciences, Sichuan University, Chengdu, Sichuan 610064, China & The Sichuan Key Laboratory for Conservation Biology of Endangered Wildlife, Sichuan University, Chengdu, Sichuan 610064, China https://orcid.org/0000-0002-9558-4154 Author Lin, Yucheng Key Laboratory of Bio-resources and Eco-environment (Ministry of Education), College of Life Sciences, Sichuan University, Chengdu, Sichuan 610064, China & The Sichuan Key Laboratory for Conservation Biology of Endangered Wildlife, Sichuan University, Chengdu, Sichuan 610064, China linyucheng@scu.edu.cn Author Li, Shuqiang Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China https://orcid.org/0000-0002-3290-5416 lisq@ioz.ac.cn text ZooKeys 2020 988 63 128 http://dx.doi.org/10.3897/zookeys.988.56188 journal article http://dx.doi.org/10.3897/zookeys.988.56188 1313-2970-988-63 6E64D69BDD734A7EAE2B3CD21247A5E3 D5BC323AA5F05894AE8FBB10A3F0960D Crassignatha thamphra Y. Lin & S. Li sp. nov. Figs 32 , 38 Type material. Holotype ♀ (IZCAS-Ar 41035), Thailand : Khon Kaen Province, Phu Pha Man District, Phu Pha Man Subdistrict, Tham Phra Cave ( 16.66603°N , 101.89623°E ; 262 m), 10.XI.2016, H. Zhao, Y. Li and Z. Chen leg.; 1♀ (NHMSU-HA089) used for sequencing, GenBank: MT992003, same data as for preceding. Diagnosis. This species differs other Crassignatha species, except C. yinzhi , by the copulatory ducts diagonally connected to the copulatory opening and not fused before reaching copulatory opening. It can be easily distinguished from C. yinzhi by the larger spermathecae separated by less than their diameter and the tighter turns of the copulatory ducts at center of the vulva (Fig. 32G vs. Fig. 37G ). Figure 32. Crassignatha thamphra sp. nov. A female habitus, dorsal B female habitus, ventral C female habitus, lateral D epigyne, ventral E epigyne, lateral F vulva, ventral G vulva, dorsal. Scale bars: 0.50 mm ( A-C ); 0.10 mm ( D-G ). Description. Female (holotype). Total length 0.64. Carapace 0.32 long, 0.32 wide, 0.28 high. Clypeus 0.10 high. Sternum 0.20 long, 0.20 wide. Abdomen 0.44 long, 0.48 wide, 0.48 high. Length of legs: I 0.92 (0.28, 0.12, 0.20, 0.16, 0.16); II 0.74 (0.22, 0.10, 0.14, 0.12, 0.16); III 0.64 (0.16, 0.10, 0.12, 0.12, 0.14); IV 0.84 (0.24, 0.12, 0.18, 0.12, 0.18). Somatic characters (Fig. 32A-C ). Coloration : prosoma yellowish brown. Legs dark brownish. Abdomen black with faint, sclerotized dots. Prosoma : carapace nearly pear shaped, surface indistinctly textured. Cephalic area elevated. ALE slightly protruded. PER straight. Chelicerae bears sparse, short setae anteriorly. Labium tongue shaped. Sternum heart shaped, slightly plump, surface smooth, truncated posteriorly. Legs : covered with setae and bristles. Abdomen : abdominal shape irregular and surface rugose (caused by alcohol immersion). Spinnerets weakly sclerotized. Epigyne (Fig. 32D-G ): epigynal area slightly sclerotized, bears a few long setae. Scape protruded, longer slightly than wide. Internal structures faintly visible via translucent tegument. Spermathecae separated by ~ 1/2 their diameter. Fertilization ducts thin, slender, originating from posteromedial margin of spermathecae, forming a U-shape. Copulatory ducts long, connected to the posterior surface of spermathecae, curving twice below spermathecae, linked diagonally, and fused to copulatory opening. Male. Unknown. Etymology. The specific name is derived from the type locality; noun in apposition. Distribution. Thailand (Fig. 38 ).