Bioacoustics of Anyphaena tibet

Diagnosis. Males of A. tibet Lin & Li , sp. nov. are similar to those of A. wuyi Zhang, Zhu & Song, 2005 and A. rhynchophysa in having a similar C and RTA but can be distinguished by the extended terminus of the MA ( vs. narrowing toward terminus in A. wuyi and A. rhynchophysa ), the width/length ratio of the vRTA is 0.5 ( vs. 0.25 in A. wuyi and 0.33 in A. rhynchophysa ), and the length ratio of the dRTA to the vRTA is almost 1:1 ( vs. 0.33 in A. wuyi and A. rhynchophysa ). Females are similar to A. wuyi and A. rhynchophysa by the convoluted CDs, but in A. tibet Lin & Li , sp. nov. , the base of the COs is not enlarged ( vs. enlarged base in A. wuyi and A. rhynchophysa ) and the CDs are not spiraled in A. tibet Lin & Li , sp. nov. ( vs. two spirals in A. wuyi and one in A. rhynchophysa ). Description. Male ( holotype , IZCAS-Ar42399, Figs 7A–C , 13B , 14G ). Total length 7.02, carapace 3.02 long, 2.51 wide, brown with black pattern. Opisthosoma 4.12 long, 2.52 wide. AER slightly recurved, PER procurved. Eye sizes and interdistances: AME 0.13, ALE 0.15, PME 0.20, PLE 0.17, AME–AME 0.14, AME–ALE 0.12, PME–PME 0.19, PME–PLE 0.18, AME–PME 0.22, ALE–PLE 0.19. Clypeus height 0.10. Chelicerae with five promarginal and eight retromarginal teeth. Endites, labium, and sternum brown. Legs brown, covered with many setae. Leg measurements: Leg I 10.82 (2.65 + 3.52 + 2.93 + 1.72), leg II 9.74 (2.63 + 3.52 + 2.25 + 1.34), leg III 10.39 (3.05 + 3.63 + 2.42 + 1.32), leg IV 11.56 (3.62 + 3.52 + 3.01 + 1.41). Leg formula 4132. Palp ( Figs 7A–C , 13B ). VTBA short; RTA with two parts, dRTA as long as vRTA, vRTA narrow. Sp with two conspicuous curves. MA well developed, shield shaped, terminus narrow. C thin. E filamentous, curved. Female ( paratype , IZCAS-Ar42400, Figs 8A–B , 14H ). Total length 8.87, carapace 3.12 long, 2.47 wide. Opisthosoma 6.04 long, 4.23 wide. Colour as in male. Eye sizes and interdistances: AME 0.14, ALE 0.14, PME 0.13, PLE 0.14, AME– AME 0.16, AME–ALE 0.14, PME–PME 0.12, PME–PLE 0.16, AME–PME 0.17, ALE–PLE 0.15. Clypeus height 0.10. Chelicerae with five promarginal and nine retromarginal teeth. Leg measurements: Leg I 9.69 (2.54 + 3.47 + 2.39 + 1.29), leg II 7.07 (1.98 + 2.13 + 1.88 + 1.08), leg III 6.11 (1.87 + 2.02 + 1.31 + 0.91), leg IV 8.10 (2.21 + 2.60 + 2.42 + 0.87). Leg formula 1423. Epigyne ( Figs 8A–B ) oval. COs concealed at lateral margin of atrium. Vulva with long and semitransparent CDs twisted between COs and S. S large, oval, separated. Material examined. Holotype ♂ , China : Tibet , Shannan , Cuona County , Le Menbazuxiang , Lewang Bridge ( 27.7987°N , 91.4374°E ), 1 June 2016 , leg. Jianglang Wu (IZCAS-Ar42399) . Paratypes . 2♂ 2♀ (IZCAS-Ar42400–Ar42403), same data as holotype . Distribution. Known only from the type locality. Etymology. The species name is a noun in apposition derived from the type locality.