Dicymbium sinofacetum, Tanasevitch, Andrei V., 2006
publication ID |
https://doi.org/ 10.5281/zenodo.273569 |
DOI |
https://doi.org/10.5281/zenodo.6492860 |
persistent identifier |
https://treatment.plazi.org/id/724CE150-2F6B-FFD2-9D01-FA2E3BCB6199 |
treatment provided by |
Plazi |
scientific name |
Dicymbium sinofacetum |
status |
sp. nov. |
Dicymbium sinofacetum View in CoL sp. n.
Figs 39–44 View FIGURES 39 – 44
? Araeoncus stigmosus Xia et al. 2001: 164 (female only!).
Material. Holotype ♂ ( SMF), China, Qinghai Prov., Bei Shan National Park, 120 km NE Xining, 2300–2700 m, 23.V.–8.VI.1996, leg. J. Martens. Paratypes: 1 ♂, 5 Ψ ( SMF), 2 Ψ ( ZMMU), together with holotype; 2 Ψ ( SMF), China, Shaanxi Prov., S flanks of Taibai Shan, above Houshenzi, primary broadleaved forest, 2500–2600 m, 25.–26.VI.1997, leg. J. Martens & P. Jäger.
Diagnosis. The species is very closely related to the Siberian D. facetum (L. Koch 1879) , but differs by the nonexpanded proximal part of the paracymbium, by the presence of a deep hollow at the base of the embolus, which is shorter than in D. facetum , as well as by the shape of the receptacula of the vulva. Like D. facetum , D. sinofacetum sp. n. has no trichobothrium on Mt IV.
Araeoncus stigmosus Xia, Zhang, Gao, Fei, Rui & Kim 2001 was described from Gansu Province, China from both sexes ( Xia et al. 2001). According to the published figures, the female of this species belongs to the genus Dicymbium Menge 1868 View in CoL , not Tibioploides Eskov & Marusik 1991 View in CoL , and is probably referred to D. sinofacetum View in CoL sp. n.
NB: The female of D. facetum View in CoL has not yet been described.
Etymology. The species name sinofacetum is a combination of Latin “Sinae” and “ facetum ”, emphasizing that the new Chinese species is closely related to Dicymbium facetum (L. Koch 1879) ; adjective.
Description. Male. Total length––2.00. Carapace 0.83 long, 0.75 wide, unmodified, reddish brown. Chelicerae 0.30 long. Legs yellowred. Leg I, 2.89 long (0.83+0.25+0.68+0.65+0.48), IV––3.09 long (0.88+0.25+0.83+0.70+0.43). Chaetotaxy 2.2.1.1, spines on tibiae I–III very small, on tibia IV almost equal to diameter of the segment. Mt IV lacking a trichobothrium. TmI––0.40. Palp ( Figs 39–41 View FIGURES 39 – 44 ). Palpal tibia before bifurcation with a small, almost transparent tooth. Suprategular apophysis long, divided into two clublike branches distally. Radix with a long, pointed, anterior outgrowth. Opisthosoma 1.15 long, 0.80 wide, grey to dark grey.
Female. Total length––2.33. Carapace 0.88 long, 0.70 wide. Chelicerae 0.35 long. Leg I, 2.84 long (0.75+0.25+0.78+0.63+0.43), IV––3.01 long (0.88+0.20+0.80+0.68+0.45). TmI––0.49. Opisthosoma 1.63 long, 1.05 wide. Epigyne as in Figs 42–44 View FIGURES 39 – 44 . Body and leg colouration, chaetotaxy as in male.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Dicymbium sinofacetum
Tanasevitch, Andrei V. 2006 |
Araeoncus stigmosus Xia et al. 2001 : 164
Xia 2001: 164 |