Cerconychia sinensis Yang & Yang, 1995

Mo, Raorao, Liu, Hao, Kong, Fanbin & Li, Weihai, 2021, Review of the genus Cerconychia Klapálek, 1913 (Plecoptera: Styloperlidae), with description of C. multiseta sp. nov., Zootaxa 5040 (4), pp. 582-588 : 587-588

Cerconychia sinensis Yang & Yang, 1995

( Fig. 5 )

Complementary description. Male adult ( Fig. 5 ). Sternum 9 bearing transverse, elliptical setal brush ( Fig. 5a ). The first cercal segment is ca. 4X as long as its basal width; distal half narrower; inner margin of distal half and the apex bear more than 20 large sized spines. In lateral aspect, the apex is hooked and beak-like, bearing dense, small and medium sized spines around the beak ( Fig. 5d ).

Examined material. Type material: holotype: male ( CAU), CHINA, Hainan Province, Jianfengling , 1981. VII.23 /VII.26, Maobing Gu; paratypes : 2 males ( CAU), same date as holotype ; 1 male ( CAU), 1983.V.21, same locality and collector as holotype . Newly collected specimens : 1 male ( HIST), CHINA, Hainan Province, Yinggeling, Hongmao Village , 2011.XI.29, Weihai Li ; 2 males ( HIST), CHINA, Hainan Province, Jianfengling , 2011. XI.27, Weihai Li .

Distribution. China (Hainan).

Remarks. C. sinensis Yang & Yang, 1995 was originally described from Hainan Province of southern China. This species was recently redescribed by Zhao et al. (2020) based on five males and one female collected in Guangxi Zhuang Autonomous region. However, after re-examination of the type series of C. sinensis and comparison of scanning electronic micrographs of the topotype ( Fig. 5 ) with redescription and color illustrations of Zhao et al. (2020: fig. 6), their specimens apparently differ from true C. sinensis and represents a different species. They are not similar to other known Cerconychia species but the closely related to C. multiseta sp. nov., however, the apical part of the basal cercal segment seem different. However, their safe identification need further detailed scanning electronic micrographs of the basal cercal segment. It is out of the scope of the present study, but herein we emphasize the diagnostic characters of the true C. sinensis to assist future identification: the first cercal segment is about 4x as long as basal width, and inner margin of bulbous distal half and the apex bear more than 20 large sized spines.

Figures

FIGURE 5. Cerconychia sinensis Yang & Yang, 1995. (male). a. Sternum 9, ventral view. b. Basal segment of left cercus, dorsal view. c. Apex of the basal segment of left cercus, dorsal view. d. Apex of the basal segment of left cercus, oblique lateral view.