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 dongnai Y. Lin & S. Li sp. nov. Figs 6 , 38 Type material. Holotype ♀ (IZCAS-Ar 40997) and paratype 1♀ (IZCAS-Ar 40998), Vietnam : Dong Nai Province, Cat Tien National Park, Natural Forest ( 11.45008°N , 107.36438°E ; 173 m), 5.IX.2015, Q. Zhao, Y. Li and Z. Chen leg.; 1♀ (NHMSU-HA092) used for sequencing, GenBank: MT992004, same data as for preceding. Diagnosis. This species is similar to C. gucheng sp. nov. but can be distinguished by the copulatory ducts twisted once in the center of vulva vs. twisted twice in the latter (Fig. 6F, G ). Description. Female (holotype). Total length 1.28. Carapace 0.48 long, 0.40 wide, 0.40 high. Clypeus 0.14 high. Sternum 0.28 long, 0.28 wide. Abdomen 0.84 long, 0.76 wide, 0.80 high. Length of legs: I 1.60 (0.54, 0.18, 0.40, 0.24, 0.24); II 1.30 (0.40, 0.14, 0.32, 0.20, 0.24); III 1.00 (0.26, 0.14, 0.20, 0.16, 0.24); IV 1.20 (0.38, 0.14, 0.28, 0.18, 0.22). Somatic characters (Fig. 6A-C ). Coloration : carapace brown, marginally darker, mouthparts and sternum brown. Legs pale brown. Abdomen pale dorsally and ventrally, black laterally and posteriorly. Prosoma : carapace nearly pear shaped, granular with sulci, with two midline setae on cephalic area. Cephalic area elevated. PER recurved. Clypeus slightly concave. Labium tongue shaped, unfused to sternum. Sternum scutiform, flat, sculptured, truncated posteriorly. Legs : patellae with dorsal seta distally, tibia with two dorsal setae. Abdomen : anteriorly rounded, posteriorly subquadrate, with a pair of posterodorsal tubercles. Spinnerets slightly sclerotized. Figure 6. Female of Crassignatha dongnai sp. nov. A habitus, dorsal B habitus, ventral C 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 ). Epigyne (Fig. 6D-G ): epigynal area distinctly sclerotized, bears a few setae. Scape large, finger-like, extended beyond the epigastric furrow. Internal structures faintly visible via the translucent tegument. Spermathecae separated by their diameter. Copulatory ducts long, connected to the dorsal center of spermathecae, curving downwards and going up to the center of vulva, then turning back vertically downward, merged before copulatory opening. Copulatory opening located at scape end. Fertilization ducts starting at inside lower margin of spermathecae, then curved posteriorly and laterally. Male. Unknown. Etymology. The specific name is derived from the type locality; noun in apposition. Distribution. Vietnam (Fig. 38 ).