Cerconychia flectospina Wu, 1962

Zhao, Meng-Yuan, Huo, Qing-Bo & Du, Yu-Zhou, 2020, Contribution to the knowledge of Chinese Cerconychia Klapálek (Plecoptera: Pteronarcyoidea: Styloperlidae) with a new synonym, Zootaxa 4759 (3), pp. 427-432 : 429-432

Cerconychia flectospina Wu, 1962

Cerconychia flectospina Wu, 1962 , Acta Entomologica Sinica Supplement, 11: 147.

Styloperla flectospina (Wu) , Uchida & Isobe, 1989, Spixiana, 12 (2): 158.

Cerconychia sapa Stark & Sivec, 2007 , Illiesia , 3 (2):11–12. syn. nov

Male: Forewing length 16.8 mm, hindwing length 14.0 mm, body length 12.2 mm. Basal cercal segment swollen in dorsal view, terminating in a long, curved, acute process projecting along inner cercal margin; basal segment and process armed asymmetrically along length with ca. 15 or more small spines; second and sometimes third segment armed with an enlarged dorsal spine. Ninth sternum bearing a thick, wide setal brush near anterior margin ( Fig. 9 ). Aedeagus membranous, without sclerites or spines; swollen basally but constricted medially, the distal ½ slender and elongated ( Fig. 10 ).

Female: Subgenital plate “very slightly produced into a short tab with mesal emargination” ( Stark & Sivec 2007).

Egg: Typical of genus. “Ovoid with collar absent and chorion smooth” ( Stark & Sivec (2007).

Nymph: Unknown.

Type locality: China, Yunnan Province, Pingbian Miao Autonomous County .

Material examined: 1 ♂, China: Yunnan Province, Yunlong County, Daoren Mountain , 2265m, 25°32.893′N, 99°11.267′E, 2009-VI-3, leg. Qian Yu-Han ( ICYZU) .

Distribution: China (Yunnan); Vietnam (Loa Cai, Sapa).

Remarks: Cerconychia flectospina was transferred by Uchida & Isobe (1989) into Styloperla based on the short "longitudinal" hairbrush on male sternum 9. Uchida & Isobe (1989) apparently relied on Wu (1962) original illustrations and were unable to examine any of C. F. Wu types of the species. Unfortunately, the type material of Wu (1962) is apparently lost (Yu-Zhou, Du, personal communication). Although the form of the hairbrush was ambiguously illustrated by Wu (1962), it is clear that the hairbrush is horizontal, typical of the genus Cerconychia rather than Styloperla , and we define the species as a Cerconychia .

Stark and Sivec (2007) described C. sapa from Vietnam. Comparisons of the male listed above, Wu (1962) original illustrations, and Stark and Sivec (2007) scanning electron micrographs and illustrations, we consider C. sapa a junior subjective synonym of C. flectospina . Additionally, the close geographical proximity ( Fig. 11 ) of Wu (1962) material, the male listed above and Stark & Sivec (2007) Lao Cai, Sapa, Vietnam material, supports the synonymy.

Figures

FIGURE 11. Distribution map of Cerconychia flectospina in Yunnan and Vietnam (the type locality marked in red).

FIGURES 8–10. Cerconychia flectospina. 8. Male head and pronotum. 9. Male cercus, A: dorsal view; B: left cercus, lateral view; C: terminalia, ventral view. 10. Male aedeagus, dorsal view.