Two new genera and five new species of Corinnidae Karsch, 1880 (Arachnida, Araneae) from China and Vietnam Author Lu, Ying https://orcid.org/0000-0002-0316-3564 College of Life Science, Shenyang Normal University, Shenyang 110034, Liaoning, China Author Chu, Chang https://orcid.org/0000-0003-3520-5463 College of Life Science, Shenyang Normal University, Shenyang 110034, Liaoning, China Author Lin, Zixuan Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China Author Pham, Dinh-Sac https://orcid.org/0000-0001-8594-5270 Vietnam National Museum of Nature (VNMN), Vietnam Academy of Science and Technology (VAST), 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam Author Li, Shuqiang https://orcid.org/0000-0002-3290-5416 Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China lisq@ioz.ac.cn Author Yao, Zhiyuan https://orcid.org/0000-0002-1631-0949 College of Life Science, Shenyang Normal University, Shenyang 110034, Liaoning, China yaozy@synu.edu.cn text ZooKeys 2023 2023-05-30 1165 17 42 http://dx.doi.org/10.3897/zookeys.1165.102672 journal article http://dx.doi.org/10.3897/zookeys.1165.102672 1313-2970-1165-17 00A3E9D03E464F69B5D11B16DAC47910 BE74C4C54BD15A98A40FA76AC2777B38 Allomedmassa tamdao Lu & Li sp. nov. Figs 1 , 2 Type material. Holotype : 1♂ (IZCAS-Ar 44416), Vietnam , Vinh Phuc, Tam Dao National Park, 21°29.428′N , 105°37.008′E , 1077 m, Sieving in leaf litter, 21 August 2007, D.S. Pham leg. Etymology. The specific name refers to the type locality and is a noun in apposition. Diagnosis. The new species resembles A. bifurca Jin, Zhang & Zhang, 2019 (cf. Figs 1 , 2 and Jin et al. 2019 : 462, figs 3A-G, 4A-C) in that the males have a similar triangular prolateral tibial tubercle (Fig. 1A ). Males can be distinguished by the slightly curved and spine-shaped embolus, which is more slender (Fig. 1B ; vs. S-shaped embolus, strong, with fine dorsal branch near tip, originating from the base of the embolus and shorter than the embolus), by the tegulum being slightly convex on the retrolateral side (Fig. 1C ; vs. tegulum strongly convex on the retrolateral side), and by the retrolateral tibial apophysis strong, with a wide base and a sharp, strongly curved tip (Fig. 1A-C ; vs. retrolateral tibial apophysis relatively slender, spine-shaped and slightly curved). Female unknown. Figure 1. Allomedmassa tamdao sp. nov., holotype male A-C palp A prolateral view B ventral view C retrolateral view. Abbreviations: E = embolus, PTT = prolateral tibial tubercle, RTA = retrolateral tibial apophysis, SD = sperm duct, ST = subtegulum. Scale bar: 0.20 mm. Figure 2. Allomedmassa tamdao sp. nov., holotype male A, B habitus A dorsal view B ventral view. Scale bar: 1.00 mm. Figure 3. Echinax baisha sp. nov., holotype male A-C palp A prolateral view B ventral view C retrolateral view. Abbreviations: E = embolus, L1 = length 1, L2 = length 2, SD = sperm duct, ST = subtegulum. Scale bar: 0.20 mm. Figure 4. Echinax baisha sp. nov., holotype male A, B habitus A dorsal view B ventral view. Scale bar: 1.00 mm. Description. Male ( holotype ; Fig. 2A, B ). Total body length 9.72: carapace 4.83 long, 3.75 wide; abdomen 4.89 long, 3.23 wide. Carapace black, obviously convex, with rough surface, highest before fovea; thoracic region almost round and cephalic region long and parallel-sided; widest at coxae II, gradually narrowing backwards, strongly concave at posterior margin before pedicel; radial and cervical grooves indistinct; fovea longitudinal, short. Diameters of eyes: AME 0.26, ALE 0.18, PME 0.22, PLE 0.22. Eye interdistances: AME-AME 0.18, AME-ALE 0.17, PME-PME 0.36, PME-PLE 0.36, AME-PME 0.26, ALE-PLE 0.16. CRW/carapace width = 0.70. MOA 0.71 long, front width 0.67, back width 0.74. Clypeus height narrower than diameter of AME. Chilum present, single, triangular, sclerotized, and brown. Chelicerae same color as carapace, concave at distal end dorsally; with three promarginal teeth, five retromarginal teeth. Endites and labium dark brown, longer than wide; endites subapically with membranous area, apical margin with long, curved setae. Labium 0.86 long, 0.68 wide. Sternum brown, shield-shaped, precoxal triangles and intercoxal sclerites present. Sternum 2.24 long, 1.83 wide. Legs dark brown to brown. Measurements of legs: I 15.25 (4.26, 1.82, 3.74, 3.44, 1.99), II 14.41 (4.12, 1.71, 3.40, 3.31, 1.87), III 11.83 (3.24, 1.53, 2.62, 2.97, 1.47), IV 15.23 (4.09, 1.59, 3.65, 4.25, 1.65). Leg spination: tibiae I-II with four pairs of ventral spines, III-IV with two pairs of ventral spines; metatarsi I and II with two pairs of ventral spines, III and IV with three pairs of ventral spines. Abdomen ovoid, dark grey, with brown dorsal scutum anteriorly, posteriorly with several light grey chevrons; venter anteriorly with brown, rectangular scutum, posteriorly dark grey. Spinnerets grey. Palp (Fig. 1A-C ). Tibia with ventral surface flat and slanting, not forming a hump, with triangular prolateral tibial tubercle; retrolateral tibial apophysis well developed, with wide base and sharp end, only curved at end. Cymbium tip conical. Tegulum slightly flattened basally, slightly convex on retrolateral side, 3/5 length of cymbium, with U-shaped sperm duct. Subtegulum exposed prolaterally. Embolus slender, spine-shaped, and slightly curved. Distribution. Vietnam (Vinh Phuc, type locality; Fig. 14 ).