Plator qiului, Lin & Li, 2020

Lin, Yejie & Li, Shuqiang, 2020, Taxonomic studies on six species of the genus Plator (Araneae: Trochanteriidae) from China, Zoological Systematics 45 (1), pp. 24-39 : 31

Plator qiului sp. nov. ( Figs 5 , 8D , 10 M–P, 11)

Holotype ♂ (IZCAS-Ar397013), China, Yunnan Province, Yuxi City, Xinping Yi and Dai Autonomous County, Mt. Ailaoshan , Laoniuchang Pine tree forest, 23.9742°N, 101.5550°E, elev. 1987 m, 24 May 2018, Lu Qiu and Zhiwei Dong leg. Paratypes. 1♂ (IZCAS-Ar39714), same data as holotype ; 1♀ (IZCAS-Ar39715), China, Yunnan Province, Yuxi City, Xinping Yi and Dai Autonomous County, Mt. Ailaoshan , Yingpan to Guanjiazhai , 23.9977°N, 101.5497°E, elev. 1988 m, 24 May 2018, Lu Qiu and Zhiwei Dong leg. ; 1♀ (IZCAS-Ar39716), China, Yunnan Province, Honghe Hani & Yi Autonomous Region, Jianshun County, Huanglong Temple , 24 February 2019, 23.6518°N, 102.7628°E, elev. 1429 m, Xuanzhao Li and Jingxian Zheng leg.

Etymology. This species is named after Mr. Lu Qiu, the collector of the specimen; noun (name) in genitive case.

Diagnosis. This new species resembles P. hanyikan sp. nov. by the males having a slender embolus and median apophysis, and the females having similar copulatory openings, copulatory ducts and spermathecae. However, the male of P. qiulu sp. nov. can be distinguished by the middle of the embolus which is consistently wide, the absence of an apophysis at the embolic base, and the tip of the embolus is anterior to the median apophysis, near the apex of the palp. In the female, the positions of the copulatory openings are posterior to the secondary spermathecae, primary spermathecae oval, width of copulatory ducts equal to that of primary spermathecae.

Description. Male (IZCAS-Ar397013). Total length 5.64, carapace 2.40 long, 3.56 wide, opisthosoma 3.56 long, 3.64 wide. Eye sizes and interdistances: AME 0.17, ALE 0.17, PME 0.15, PLE 0.18, AME–AME 0.08, AME–ALE 0.07, PME– PME 0.19, PME–PLE 0.24, AME–PME 0.07, ALE–PLE 0.18. Clypeus height 0.03. Chelicerae with four promarginal and three retromarginal teeth. Leg measurements: leg I: 8.10 (2.94 + 2.75 + 1.47 + 0.94), leg II: 12.39 (4.08 + 4.55 + 2.53 + 1.23), leg III: 11.77 (3.96 + 4.20 + 2.43 + 1.18), leg IV: 9.74 (3.52 + 3.16 + 2.05 + 1.01). Leg formula: 2341.

Male palp ( Figs 5 C–D, 8D). Retrolateral tibial apophysis absent. Cymbium oval, sub-tegulum red-brown, mostly hidden under tegulum. Tegulumnearly oval, median apophysis thin, worm-shaped. Embolus slightly curved, worm-shaped, the middle of embolus is expanded, embolic base apophysis absent. Conductor membranous and surrounds half of the embolus, originating between median apophysis and embolic base.

Female (IZCAS-Ar39715). Total length 9.36, carapace 2.84 long, 4.55 wide, opisthosoma 6.47 long, 6.09 wide. Eye sizes and interdistances: AME 0.17, ALE 0.13, PME 0.14, PLE 0.23, AME–AME 0.13, AME–ALE 0.16, PME–PME 0.31, PME–PLE 0.31, AME–PME 0.12, ALE–PLE 0.23. Clypeus height 0.05. Chelicerae with five or six promarginal and three retromarginal teeth. Leg measurements: Leg I: 9.94 (3.56 + 3.32 + 1.92 + 1.14), leg II: 12.45 (4.95 + 4.97 + 1.29 + 1.24), leg III: 14.12 (4.90 + 5.05 + 2.91 + 1.26), leg IV: 11.64 (4.30 + 3.68 + 2.53 + 1.13). Leg formula: 3241.

Epigyne ( Figs 5 A–B) copulatory ducts curved, semicircular. Secondary spermathecae anterior to copulatory openings, small, size equal to secondary spermathecal head. Primary spermathecae oval, posterior to secondary spermathecae, connected with fertilization ducts.

Distribution. Known only from the type localities.

Figures

Figure 5. Plator qiului sp. nov., paratype female and holotype male. A. Epigyne, ventral view. B. Vulva, dorsal view. C. Left palp, prolateral view. D. Same, retrolateral view. Scale bars=0.2mm.

Figure 8. Plator spp., male holotypes, left palp, ventral view. A. P. cyclicus sp. nov. B. P. dazhonghua sp. nov. C. P. hanyikani sp. nov. D. P. qiului sp. nov. Scale bars=0.2mm.

Figure 10. Habitus of four new Plator species, male dorsal view (A, E, I, M), ventral view (B, F, J, N) and female dorsal view (C, G, K, O), ventral view (D, H, L, P). A–D. P. cyclicus sp. nov. E–H. P. dazhonghua sp. nov. I–L. P. hanyikani sp. nov. M–P. P. qiului sp. nov. Scale bars=1.0mm.