Euochin tianhe, Wang & Zhang, 2023

Wang, Weihang & Zhang, Junxia, 2023, On fourteen species of Euochin Prószyński, 2018 from China (Araneae: Salticidae: Euophryini), Zootaxa 5297 (3), pp. 337-379 : 362-364

publication ID	https://doi.org/ 10.11646/zootaxa.5297.3.2
publication LSID	lsid:zoobank.org:pub:A5E47BD6-8995-40CC-9C0F-CA7462A62DF2
DOI	https://doi.org/10.5281/zenodo.8005070
persistent identifier	https://treatment.plazi.org/id/F70C8787-FF96-E061-FF5C-F8D3FD9FF806
treatment provided by	Plazi
scientific name	Euochin tianhe
status	sp. nov.

Treatment

Euochin tianhe sp. nov. (Rãƙẅss)

Figs 154–169 View FIGURES 154–158 View FIGURES 159–165 View FIGURES 166–169

Type material. Holotype: ♁ (MHBU-ARA-00025239), CHINA: Gansu Province, Tianshui City, Maiji District, Quxi Forest Park (曲ĀAIJȑȁ), 34.248973°N, 106.012613°E, 1433 m a.s.l., 9 August 2021, leg. Z. Li & R. Zhang. GoogleMaps Paratypes: 2♀ (MHBU-ARA-00025240), same data as holotype GoogleMaps .

Etymology. The specific epithet is derived from the word “Tianhe” (meaning the river flowing from sky) in the ancient myth of Tianshui City (the type locality of the new species). Noun in apposition.

Diagnosis. Males can be easily distinguished from all known congeners by the presence of the flag-like embolic apophysis ( Figs 159–162 View FIGURES 159–165 , 166 View FIGURES 166–169 ). The female epigyne resembles that of Euochin lingyi sp. nov. and E. nanjiabawa sp. nov., but the three species can be distinguished by: (1) the shapes of the epigynal windows (wider than long in E. nanjiabawa sp. nov. and E. tianhe sp. nov., while longer than wide in E. lingyi sp. nov.); (2) the distances between the copulatory openings (close to each other in E. lingyi sp. nov. and E. tianhe sp. nov., while far away in E. nanjiabawa sp. nov.); (3) the trajectories of the copulatory ducts (running antero-laterally from the spermatheca in E. nanjiabawa sp. nov. and E. tianhe sp. nov., while running posteriorly in E. lingyi sp. nov.); and (4) the sizes of the fertilization ducts (much larger in E. nanjiabawa sp. nov. and E. tianhe sp. nov., while smaller in E. lingyi sp. nov.) (cf. Figs 83–84 View FIGURES 80–84 , 87–88 View FIGURES 85–88 , 115–116, 119–120, 164–165, 168–169).

Description. Male. Habitus see Figs 154,156 View FIGURES 154–158 .Carapace length 1.549; abdomen length 1.468. Eye measurements: AME 0.297, ALE 0.191, PME 0.068, PLE 0.169. Leg measurements: I 2.060 (0.605, 0.326, 0.474, 0.321, 0.334), II 1.879 (0.652, 0.249, 0.364, 0.264, 0.350), III 2.264 (0.742, 0.334, 0.398, 0.433, 0.357), IV 2.691 (0.880, 0.289, 0.560, 0.574, 0.388); leg formula: 4312. Color in ethanol: carapace dark brown, covered with yellow and white setae. Abdomen dark brown, covered with yellow and white setae. Chelicera ( Fig. 158 View FIGURES 154–158 ) with two promarginal and one retromarginal teeth. Palp ( Figs 159–162 View FIGURES 159–165 , 166–167 View FIGURES 166–169 ): distal femur and patella with long white setae; embolic disc relatively small, partly hidden by tegulum in ventral view; embolus tapered, with a blunt embolic flange ventrally; cymbial flange notably extended; RTA finger-like.

Female. Habitus see Figs 155, 157 View FIGURES 154–158 . Carapace length 1.646; abdomen length 1.642. Eye measurements: AME 0.380, ALE 0.234, PME 0.085, PLE 0.182. Leg measurements: I 2.391 (0.731, 0.398, 0.577, 0.373, 0.312), II 2.150 (0.712, 0.376, 0.469, 0.297, 0.296), III 2.582 (0.861, 0.304, 0.534, 0.424, 0.459), IV 3.211 (0.997, 0.382, 0.686, 0.590, 0.556); leg formula: 4312. Color in ethanol: like that of male, but abdomen darker in coloration. Chelicera as in male. Epigyne ( Figs 163–165 View FIGURES 159–165 , 168–169 View FIGURES 166–169 ): epigynal window wider than long; copulatory opening located centrally at posterior margin of epigynal window; copulatory duct short, with obvious accessory gland; spermatheca ovoid; fertilization duct large.

Distribution. China (Gansu).