On five new species of the genera Araneus and Hypsosinga (Araneae, Araneidae) from Vietnam Author Mi, Xiaoqi https://orcid.org/0000-0003-1744-3855 College of Agriculture and Forestry Engineering and Planning, Guizhou Provincial Key Laboratory of Biodiversity Conservation and Utilization in the Fanjing Mountain Region, Tongren University, Tongren 554300, Guizhou, China 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 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 phamdinhsac@gmail.com text ZooKeys 2023 2023-05-11 1161 69 87 http://dx.doi.org/10.3897/zookeys.1161.102375 journal article http://dx.doi.org/10.3897/zookeys.1161.102375 1313-2970-1161-69 AC016DCC73CF4D42ADD0D030B0FE7D97 92281B16DD57554CBA2E8ECD82629129 Araneus ethani sp. nov. Figs 3 , 9E-H Type material. Holotype ♀ (IZCAS-Ar44132), Vietnam: Ninh Binh Province, Cuc Phuong National Park, disturbed forest ( 20°16.38'N , 105°41.10'E , ca 280 m), 3.IV.2007, Dinh-Sac Pham leg. Paratypes : 1♀ (IZCAS-Ar44133), same locality and collector as holotype ( 20°15.30'N , 105°42.55'E , ca 250 m), 4.XII.2007; 1♀ (IZCAS-Ar44134), Hai Phong Province, Cat Ba National Park, disturbed forest ( 20°48.25'N , 107°00.02'E , ca 80 m), 16.VII.2008, Dinh-Sac Pham leg. Etymology. The species name is a boy's name from Vietnam; noun (name) in genitive case. Diagnosis. The new species resembles A. eugenei sp. nov. in appearance but differs in having: 1) the scape truncated (Fig. 3A-D ) vs triangular (Fig. 1B, D ); 2) the copulatory openings situated on the ventral surface of the epigyne (Fig. 3A, C ) vs on the posterior surface (Fig. 1B ); and 3) the spermathecae spaced by about one diameter (Fig. 3D ) vs about one radius (Fig. 1C ). Figure 3. Araneus ethani sp. nov., female holotype A epigyne, ventral view B ibid., anterior view C ibid., posterior view D vulva, posterior view E habitus, dorsal view F ibid., ventral view G ibid., lateral view. Scale bars: 0.1 mm ( A-D ); 1 mm ( E-G ). Description. Female (holotype, Figs 3 , 9E-H ). Total length 4.10. Carapace 2.25 long, 1.55 wide. Abdomen 2.60 long, 1.75 wide. Clypeus 0.08 high. Eye sizes and interdistances: AME 0.15, ALE 0.10, PME 0.13, PLE 0.13, AME-AME 0.20, AME-ALE 0.15, PME-PME 0.15, PME-PLE 0.30, MOA length 0.48, anterior width 0.43, posterior width 0.43. Leg measurements: I 5.80 (1.75, 2.15, 1.25, 0.65), II 5.15 (1.55, 1.85, 1.10, 0.65), III 3.90 (1.25, 1.35, 0.70, 0.60), IV 5.35 (1.70, 1.90, 1.10, 0.65). Carapace brown, with yellow anteriorly to fovea and yellow edges in thoracic region, with pale setae. Chelicerae brown with five promarginal and three retromarginal teeth. Endites and labium brown at base, paler distally. Sternum with short, longitudinal, yellow patch. Legs yellow with yellowish-brown annuli. Abdomen elliptical, ~1.25 x longer than wide, pointed anteriorly and with pair of lateral humps posteriorly, covered with pale setae, dorsum grayish brown with white spots; venter brown with yellow patches. Spinnerets yellowish brown. Epigyne (Fig. 3A-D ): ~2.8 x wider than long in ventral view; scape truncated, ~6.0 x wider than long in anterior view; copulatory openings slit-like, situated on ventral surface; copulatory ducts longer than spermatheca diameter, curved about 90°; spermathecae globular, about one diameter apart. Male. Unknown. Variation. Total length: ♀♀ 3.9-4.3. Distribution. Vietnam (Ninh Binh and Hai Phong Provinces).