Chydaeus weishanensis, sp. n.
Creators: name: Kataev, Boris M.
name: Wrase, David W.
name: Schmidt, Joachim
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Carabidae
Chydaeus
Chydaeus weishanensis

description: <i>Chydaeus weishanensis</i> sp. n. (Figs 4, 32– 38) <b>Type material</b>. Holotype: &amp;male;, China “YUNNAN 2000–2800m 25.11 N 100.24 E WEIBAOSHAN mts. W slope 25– 28 / 6.92 Vít. Kubá&amp;ncaron; leg.”, “COLL. WRASE BERLIN” (cWR). Paratypes: 1 &amp;female;, China “ YUNNAN 1800–2500 m 25.10 N 100.21 E WEISHAN mt. 1992 D. Král lgt. 22–25./ 6 ” (NHMB); 1 &amp;female;, “ CHINA (Yunnan) Dali Bai Auton. Pref., Wuliang Shan, 9 km SW Weishan, 2450–2500 m, 25 ° 10 ' 14 "N / 100 ° 14 ' 22 "E (W. slope, sec. oak/pine for., pasture, und. stones) 13.VI. 2007 D.W.Wrase [35]”, “ <i>Chydaeus</i> spec. 2 Wrase det. 2012 ” (cWR). <b>Description</b>. Dorsal habitus: Fig. 4. Size. Body length 8.2 –9.0 mm, width 3.9–4.2 mm; in holotype 9.0 and 4.2 mm, respectively. Morphological characters as described for <i>C. kabaki</i> <b>sp. n.</b> except as follows: Color. Body black or dark brown, slightly shiny on dorsum, with very narrow lateral margins of pronotum and elytra, occasionally also with epipleurae of elytra reddish brown; palpi and antennae unicolorous, light brown; legs brown or dark brown, usually with darker femora and paler tarsi. Microsculpture. Head with dorsal microsculpture markedly obliterate in male and more distinct, consisting of very fine isodiametric meshes in female. Pronotum in male with microsculpture markedly obliterate, almost indistinct; in female with microsculpture consisting of fine isodiametric meshes along sides and of obliterate, weakly transverse meshes on remaining surface. Elytra in male with isodiametric meshes in narrow area along base and on two lateral intervals throughout and with weakly transverse meshes on remaining surface, meshes on intervals 1 to 5 basally rather strongly obliterate; in female elytral microsculpture distinct throughout, consisting of isodiametric meshes in basal half and on two or three lateral intervals throughout and of weakly transverse meshes on remaining surface. Head. Comparatively large (HWmax/PWmax = 0.68–0.70 and HWmin/PWmax = 0.59–0.61), finely punctate either throughout or only laterally, with small, moderately convex eyes (HWmax/HWmin = 0.12–0.18). Supraorbital setigerous pores located at level of hind margin of eyes, removed on frons at a distance of about three diameters of pore from supraorbital furrows. Pronotum. Narrower and with wider base than in <i>C. kabaki</i> <b>sp. n.</b> (PWmax/PL = 1.42–1.49; PWmax/PWmin = 1.19–1.23); basal margin nearly straight medially, slightly oblique laterally; basal angles slightly more than 90 °. Pronotal disc more convex, with extremely narrow lateral depressions reaching pronotal basal edge. Elytra. Slightly more convex than in <i>C. kabaki</i> <b>sp. n.</b> [EL/EW = 1.25–1.34 (1.26–1.34 in male and 1.25 in female), EL/PL = 2.25–2.29 (2.27–2.29 in male and 2.25 in female), EW/PWmax = 1.20–1.22 (1.20–1.22 in male and 1.22 in female)], with obtuser inner humeral angle (Fig. 33). Parascutellar strioles about as long as total width of intervals 1 + 2 basally, apices of parascutellar strioles free, not connected with striae 1. All intervals basally and apically, and intervals 5 to 9 or 7 and 8 almost throughout minutely punctate. Ventral side. Metepisterna (Fig. 32) more strongly narrowed posteriad than in <i>C. kabaki</i> <b>sp. n.</b> Legs. Metacoxae without additional posteromedial setigerous pores and without additional medial setigerous or unsetigerous pores. Tarsomere 5 with three or four pairs of lateroventral setae. Female genitalia (Figs 37–38). Apical stylomere comparatively wide in lateral aspect, arcuate in ventral aspect. Aedeagus. Median lobe (34–35) more robust than in <i>C. kabaki</i> <b>sp. n.</b>; terminal lamella shorter and wider, distinctly curved ventrad, with sides more strongly converging posteriad (Fig. 36); internal sac with two elongate spiny patches: a longer one on right side and a shorter one on left side. <b>Etymology</b>. The specific name refers to Weishan, a mountain in the Chinese province Yunnan, where the type series was collected. <b>Comparative remarks</b>. Very similar to <i>C. kabaki</i> <b>sp. n.</b> in most characters including the male genitalia, but distinctly differs from the latter species in having the pronotum narrower, inner humeral angle obtuser, median lobe of the aedeagus with shorter and wider terminal lamella, and internal sac with two elongate spiny patches instead of one present in <i>C. kabaki</i> <b>sp. n.</b> The females of two these species are additionally distinguished from each other by the features of elytral microsculpture on intervals 2–8 apically, which consists of slightly transverse meshes in <i>C. weishanensis</i> <b>sp. n.</b> and of nearly isodiametric meshes in <i>C. kabaki</i> <b>sp. n.</b> <i>Chydaeus weishanensis</i> <b>sp. n.</b> easily differs from <i>C. kasaharai</i> and <i>C. shaanxiensis</i> <b>sp. n.</b> in having tarsi glabrous dorsally, elytra impunctate at least in middle portions of internal intervals and pronotal lateral bead not widened basally. Like <i>C. kabaki</i> <b>sp. n.</b>, <i>C. weishanensis</i> <b>sp. n.</b> is distinguished from <i>C. shunichii</i> and <i>C. fugongensis</i> by having the pronotum larger, narrower and more convex, the metacoxae without additional setigerous pores, and the median lobe of aedeagus slenderer, curved ventrad at apex and with different armature in the internal sac. <b>Distribution</b>. This new species is known from the Weishan mountain range in the northern part of the Wuliang Shan, Yunnan, China.
description: Published as part of <i>Kataev, Boris M., Wrase, David W. &amp; Schmidt, Joachim, 2014, New species of the genus Chydaeus from China, Nepal, Myanmar, and Thailand, with remarks on species previously described (Coleoptera: Carabidae: Harpalini), pp. 1-28 in Zootaxa 3765 (1)</i> on pages 12-13, DOI: 10.11646/zootaxa.3765.1.1, http://zenodo.org/record/285551