Psechrus spatulatus, Feng, Ping, Zhao, Yu, Wu, Xiu-Mei, Ma, Yan-Yan, Yang, Ting-Bang, Li, Cheng-Gong & Yang, Zi-Zhong, 2016

Feng, Ping, Zhao, Yu, Wu, Xiu-Mei, Ma, Yan-Yan, Yang, Ting-Bang, Li, Cheng-Gong & Yang, Zi-Zhong, 2016, Four new species of Psechrus from Yunnan Province, China (Araneae, Psechridae), Zootaxa 4088 (2), pp. 177-200 : 194-199

publication ID	https://doi.org/ 10.11646/zootaxa.4088.2.2
publication LSID	lsid:zoobank.org:pub:BDC1501B-E6D4-4EBF-B227-A4CFAB026B48
DOI	https://doi.org/10.5281/zenodo.6083107
persistent identifier	https://treatment.plazi.org/id/4B7C87D6-9E73-FFC2-68CD-FF10FB21410E
treatment provided by	Donat
scientific name	Psechrus spatulatus
status	sp. nov.

Treatment

Psechrus spatulatus View in CoL sp. nov.

Figs 12–15 View FIGURES 12 a – g View FIGURES 13 a – e View FIGURES 14 a – h View FIGURES 15 a – c

Type material: Holotype ♂ (BS04), China, Yunnan Province: Taibao Park in Taibao Shan, Baoshan, ca. 1760 m, 25°07′13.6″N, 099°09′15.0″E, 29-IV-2012, Z.Z. Yang, P. Feng, Y.Y. Ma & W. Sun leg. Paratypes (7 ♂, 35 ♀): 1 ♀ (BS24), Baimiao Reservoir, Baoshan, ca. 1820 m, 25°15′32.3″N, 099°13′12.2″E, 01-X-2011, Z.Z. Yang leg; 6 ♀ (WBS05–10), Longjie Township, Weishan County, Dali Prefecture, 2100 m, 25°10′14.5″N, 100°01′28.9″E, 18-V- 2002, Z.Z. Yang leg; 2 ♂ (BS02–03)13 ♀ (BS01, BS05–16), data the same as for holotype; 2 ♀ (BS25, BS30), locality the same as for holotype, 05-X-2011, Z.Z. Yang, H.B. Pu, P. Feng & Y.Y. Ma leg.; 1 ♀ (BS31), locality the same as for holotype, 3-XI-2011, Z.Z. Yang, P. Feng & Y.Y. Ma leg.; 1 ♂ (CN06), Goujie Township, Changning County, Baoshan, 1700 m, 25°01′34.4″N, 099°49′04.2″E, 29-XII-2012 (final moult on 20-II-2013), P. Feng leg; 1 ♀ (CN01), Mangshui Township, Changning County, Baoshan, 1750 m, 24°52′54.9″N, 099°40′10.7″E, 16-II-2012 (final moult on 22-III-2012), Z.Z. Yang, P. Feng & Y.Y. Ma leg; 1 ♂ (FQ01), 3 ♀ (FQ02–03, FQ05), Xinhua Township, Fengqing County, Lincang, 2180 m, 24°52′14.6″N, 100°04′26.5″E, (FQ01–03 20-V-2007, (FQ05) 20- VII-2007, F.S. Zha leg; 1 ♀ (SD02), Daliang Shan, Shidian County, Baoshan, ca. 1770 m, 24°34′46.5″N, 099°11′54.3″E, 04-X-2011, Z.Z. Yang & H.B. Pu leg; 1 ♀ (FQ06), Fengshan Township, Fengqing County, Lincang, 1540 m, 24°34′00.3″N, 099°57′11.1″E, 15-II-2012, Z.Z. Yang, P. Feng & Y.Y. Ma leg; 1 ♂ (XP32), 1 ♀ (XP33), Jinshan Yakou, Ailao Shan, Xinping County, Yuxi, 2280 m, 23°56′57.8″N, 101°30′15.2″E, 19-V-2011, Z.X. Li leg.; 2 ♂ (MJ01, MJ06) 5 ♀ (MJ02–04, MJ07–08), Mojiang County (By the 323 National Road), Puer, ca. 1520 m, 23°27′22.1″N, 101°43′25.1″E, 04-V-2012, Z.Z. Yang, P. Feng, Y.Y. Ma & W. Sun leg.

Additional material (6 subadult ♂, 1 subadult ♀, 2 juvs): 3 subadult ♂ (BS17–19), data the same as for holotype; 3 subadult ♂ (BS27–29), 5 juvs (BS20–23, BS26), locality the same as for holotype, 05-X-2011, Z.Z. Yang, H.B. Pu, P. Feng & Y.Y. Ma leg; 2 juvs (BS32–33), locality the same as for holotype, 3-XI-2011, Z.Z. Yang, P. Feng & Y.Y. Ma leg.; 1 subadult ♀ (FQ04), Xinhua Township, Fengqing County, Lincang, 2180 m, 24°52′14.6″N, 100°04′26.5″E, 20-V-2007, F.S. Zha leg.

Etymology. The specific name refers to the spatula-like embolus.

Diagnosis. Male distinguished from all other Psechrus species of the sinensis -group by the spatula-like embolus ( Figs 12a–b View FIGURES 12 a – g , 13a–b View FIGURES 13 a – e ). Females distinguished from all other species of the sinensis -group, except P. jinggangensis Wang & Yin 2001 (Wang & Yin 2001: 335, figs 11–12), by the following characters in combination: (1) jug-/flagon-/vase-like median septum (MS), (2) spermathecal heads extending anteriorly, (3) bulbous sections of copulatory duct smaller than receptacula. Distinguished from P. jinggangensis by the shorter and broader MS ( Figs 12f View FIGURES 12 a – g , 13d View FIGURES 13 a – e ) and the shorter copulatory ducts and spermathecal heads, the latter also clearly broader ( Figs 12g View FIGURES 12 a – g , 13e View FIGURES 13 a – e ).

Description. Measurements: Male (measurements of holotype first, those of paratype males given as ranges in parentheses): Total length 14.98 (9.66–16.72), Prosoma length 7.05 (4.34–7.70), prosoma width 5.22 (3.10– 5.91); opisthosoma length 7.93 (5.32–9.02), opisthosoma width 3.36 (2.14–3.84). Eyes diameter: AME 0.32 (0.25– 0.35), ALE 0.36 (0.31–0.40), PME 0.39 (0.31–0.42), PLE 0.37 (0.28–0.41); Distance between eyes: AME–AME 0.20 (0.09–0.23), AME–ALE 0.07 (0.04–0.08), ALE–PLE 0.43 (0.30–0.49), PME–PME 0.26 (0.15–0.32), PME– PLE 0.31 (0.23–0.44), AME–PME 0.58 (0.38–0.63). Clypeus height at AME 0.62 (0.49–0.69). Measurements of palp and legs as shown in table 7. Leg formula: 1243. Spination of palp and legs as shown in table 8.

Female (measurements of BS24 first, together with those of BS07 and BS11 given as ranges in parentheses): Total length 21.22 (14.58–24.03), Prosoma length 8.28 (6.65–8.90), prosoma width 6.06 (4.58–6.66); opisthosoma length 12.94 (7.93–15.13), opisthosoma width 8.38 (3.92–8.99). Eyes diameter: AME 0.43 (0.27–0.49), ALE 0.52 (0.31–0.52), PME 0.45 (0.39–0.45), PLE 0.47 (0.41–0.49); Distance between eyes: AME–AME 0.18 (0.18–0.20), AME–ALE 0.07 (0.07–0.10), ALE–PLE 0.58 (0.56–0.64), PME–PME 0.36 (0.32–0.42), PME–PLE 0.56 (0.44– 0.56), AME–PME 0.78 (0.65–0.81). Clypeus height at AME 0.73 (0.71–1.06). Measurements of palp and legs as shown in table 7. Leg formula: 1243. Spination of palp and legs as shown in table 8.

Colouration almost the same as for the general colouration of Psechrus , see Bayer (2012). Chelicerae with 3 promarginal, 4 retromarginal teeth, and 3 (male) or 7 (female) central denticles. Leg I of male with a row of short macrosetae at coxae only.

Male palp: distal 1/2 of dorsal palpal cymbium with scopula ( Fig. 12d View FIGURES 12 a – g ). conductor (C) with very dense tubercles prolaterally; distal part of C duck-tongue-shaped in retrolateral view. Embolus spatula-like, with dense transversal marks; embolic base short and broad ( Figs 12a, c View FIGURES 12 a – g ). Palpal femur with a cambered bulge ( Fig. 12e View FIGURES 12 a – g ).

Female copulatory organ: Slit sense organs (SO) and muscle sigilla (SG) outside the epigynal field. Median septum (MS) jug-/flagon-/vase-shaped, with central part broader than anterior and posterior part ( Figs 12f View FIGURES 12 a – g , 13d View FIGURES 13 a – e ). Vulva with copulatory ducts and spermathecal heads in relation to other species of the sinensis -group short; spermathecal base round ( Figs 12g View FIGURES 12 a – g , 13e View FIGURES 13 a – e ).

Intraspecific variation. As shown in Fig. 14 View FIGURES 14 a – h , the shape of MS varies distinctly: BS01 ( Figs 14a–b View FIGURES 14 a – h ) with MS as long as wide, without incision; FQ06 ( Figs 14c–d View FIGURES 14 a – h ) with MS comparable with BS24 ( Figs 12f–g View FIGURES 12 a – g ); SD02 ( Figs 14e–f View FIGURES 14 a – h ) with evident incisions in posterior third of lateral margins of MS, MJ03 ( Figs 14g–h View FIGURES 14 a – h ) with posterior margin of MS narrower than anterior margin. Vulvae with less variation as shown in Figs 12g View FIGURES 12 a – g , 14b, d, f, h View FIGURES 14 a – h . Conductor of FQ01 ( Fig. 15a View FIGURES 15 a – c ) and MJ01 ( Fig. 15c View FIGURES 15 a – c ) with fewer tubercles; MJ01 with embolus narrower than in others, and the sperm duct broad U-shaped, runs almost transversally in ventral view ( Fig. 15a View FIGURES 15 a – c ), without loop prolaterally ( Fig. 15b View FIGURES 15 a – c ).