Yunguirius B. Li, Zhao & S. Li, 2023
|
publication ID |
https://dx.doi.org/10.3897/zookeys.1159.100786 |
|
publication LSID |
lsid:zoobank.org:pub:C2BD6C63-A9D2-4C3E-8189-3F9E3001AC64 |
|
persistent identifier |
https://treatment.plazi.org/id/95909E7E-61FF-4CCC-9747-900F0304B3BF |
|
taxon LSID |
lsid:zoobank.org:act:95909E7E-61FF-4CCC-9747-900F0304B3BF |
|
treatment provided by |
|
|
scientific name |
Yunguirius B. Li, Zhao & S. Li |
| status |
gen. nov. |
Genus Yunguirius B. Li, Zhao & S. Li View in CoL View at ENA gen. nov.
Type species.
Coelotes ornatus Wang, Yin, Peng & Xie, 1990, from Kunming, Yunnan, China (designated herein).
Etymology.
The generic name is derived from the pinyin word “Yungui”, referring to Yunnan-Guizhou Plateau where the genus is distributed, and "- rius " refers to the genus as part of its sister groups of genera: Nuconarius , Hengconarius , and Sinodraconarius . The gender is masculine.
Diagnosis.
Morphological characteristics of Yunguirius gen. nov. resemble those of Nuconarius , Hengconarius , and Sinodraconarius , which are distributed in southeastern China, by cymbial furrow short, with a length less than half of cymbium (fig. 3 in Zhang 1993; fig. 31 in Peng and Wang 1997), embolus thick, conductor with two branches (figs 1-3 in Zhang 1993; figs 30, 31 in Peng and Wang 1997), and epigyne with posterior sclerite, epigynal teeth absent, atrium with sclerotic margin (Figs 2A View Figure 2 , 3A View Figure 3 , 4A View Figure 4 ). However, it can be distinguished from these genera by habitus, and detailed structures of male palp and epigyne as follows: 1) carapace tonneau-shaped, first half wide, and abdomen beloid (Figs 2C View Figure 2 , 3C View Figure 3 , 4C View Figure 4 ); 2) male palp with bifurcate conductor, the upper branch large and wide with groove, while the lower one is more elongated (fig. 2 in Zhang 1993; fig. 252D in Zhu et al. 2017); 3) epigynal atrium very large, in the centre of epigyne and occupying c. 1/2 the size of epigyne (Figs 2A View Figure 2 , 3A View Figure 3 , 4A View Figure 4 ); 4) epigyne dark and sclerotic, with lateral folds that are located between the lateral margin of the atriumand the epigynal hood (Figs 2A View Figure 2 , 3A View Figure 3 , 4A View Figure 4 ); 5) copulatory duct and spermathecal head concomitant, along the contour of the atrium (Figs 2B View Figure 2 , 3B View Figure 3 , 4B View Figure 4 ); and 6) spermatheca located posteriorly, spermathecal head very long and continuous with the copulatory duct (Figs 2B View Figure 2 , 3B View Figure 3 , 4B View Figure 4 ).
Description.
Small to very large spiders, body length 6.00 to 21.80. Carapace brown to black, tonneau-shaped, longer than or as long as abdomen, with longitudinal fovea and dark radial grooves; chelicerae black, with three promarginal and two retromarginal teeth; endites and labium brown to dark brown, anterior white with black hairs; sternum brownish to brown, longer than wide. Abdomen yellowish-brown, nearly oval, posterior widest, with four to six darker chevrons or speckles, or without any pattern. Leg formula 4> 1> 2> 3 or 1> 4> 2> 3. Male palp: patellar apophysis finger-shaped, retrolateral tibial apophysis large, lateral tibial apophysis small, median apophysis spoon-shaped; conductor large, with two branches; embolus thick, beginning at a 7 o’clock position, embolic base swollen; cymbial furrow short, with the length less than half of cymbium. Epigyne: posterior epigynal sclerite varying in shape; atrium very large, wide to narrow, with osteosclerotic lateral margin, inside white osteon, outside with brownish or brown markings and brown or darker folds; copulatory duct membranous, arising posteriorly, extending to anterior, opening anteriorly; spermatheca brown, spermathecal base swollen, spermathecal head long and line-shaped, extending anteriorly, opposite end swollen, lamellar or connected with a stalk.
Distribution.
Guizhou, Hunan, Sichuan and Yunnan, China (Fig. 5 View Figure 5 ).
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.