Sinacroneuria dabieshana Li & Murányi, 2014

Li, Weihai, Murányi, Dávid & Wang, Rongfeng, 2014, A new species of Sinacroneuria (Plecoptera: Perlidae) from China with a provisional key to species, Zootaxa 3895 (2), pp. 285-291 : 285-288

Sinacroneuria dabieshana Li & Murányi, 2014

(Figs. 1–2)

Adult habitus. General body color yellow brown. Triocellate, anterior ocellus smaller; distance between ocelli about two times the diameter of the ocellus. Head pale brown with dark brown area covering ocellar triangle, slightly extending laterally and becoming pale brown; lappets and triangular marking forward of M-line brown (Fig. 1a); compound eyes black; antennae flagellum basally dark brown, generally brown medially, scape and pedicel brownish. Pronotum brown with obscure rugosities (Fig. 1a); wing membrane transparent, veins brown; legs brownish. Abdominal segments brownish to brown.

FIGURE 1. Sinacroneuria dabieshana Li & Murányi , sp. nov., male. a. Head and pronotum, dorsal view. b. Terminalia, dorsal view. c. Terminalia, ventral view. d. Terminalia, lateral view. e. Paraproct, caudal view. f. Aedeagus before eversion, ventral view.

FIGURE 2. Sinacroneuria dabieshana Li & Murányi , sp. nov., a–e, male. a. Sternum 9, ventral view. b. Aedeagus, lateral view. c. Aedeagus, ventral view. d. Aedeagus, dorsal view. e. Terminalia, dorsal view showing armature variation. f. Female terminalia, ventral view.

Male. Forewing length 13.9–14.8 mm. Tergum 9 with posterior margin produced into a rounded process, covered with many dorsal sensilla basiconica, in older specimens the sensilla patch are larger (Figs. 1b, 2e). Sensilla basiconica patch of tergum 10 apparently divided medially in teneral specimens, but mostly fused in older specimens (Figs. 1b, 2e). Paraprocts heavily sclerotized, with small, sharp tips, triangular in caudal aspect (Figs. 1b, 1e). Sternum 9 with posterior margin sclerotized, oval-shaped hammer located on stem of a large Y-shaped sclerite; hammer projecting slightly in lateral view (Fig. 2a, 1d). Uneverted aedeagus (Figs. 1c & 1f) showing Yarms about 4× as long as stem, and with a pair adjacent lateral sclerites of the same origin (Fig. 2d), and an uneverted slender sclerite. Everted aedeagus showing the apex of Y-arms horn-like, curved inward and upward. The median sclerite after eversion with an apical hook bearing tiny spines (Figs. 2b–2d).

Female (Fig. 2f). Forewing length 18.2–19.3 mm. Head pattern similar to male. Subgenital plate sclerotized along posterior margin, medially produced as a small subquadrate tab with an apical notch.

Material examined. Holotype male ( HIST), China: Henan Province, Xin County, Mt. Dabieshan, Liankangshan National Nature Reserve, Laomiao Protection station, 31°64,39'N, 114°87,95'E, light trap, 2014. VI.17, W.H. Li. Paratypes: 3 males, 2 females ( HIST), 2 males ( HNHM), the same locality and data as holotype; 1 female ( HNHM), Henan Province, Xin County, Mt. Dabieshan, Liankangshan National Nature Reserve, 31°64,39'N, 114°87,95'E, light trap, 2014. VII. 18–21, Guoxi Xue; 1 male and 1 female ( CAUC), Hubei Province, Yingshan County, Mt. Dabieshan, Taohuachong, 30°98,93'N, 116°04,08'E, light trap, 2014. VI. 23, Xiaoshuan Bai.

Distribution. China (Henan and Hubei provinces).

Remarks. The new species is similar to S. bicornuata from Sichuan Province of southwestern China in the shape of tergum 9. However, the extruded aedeagus of S. bicornuata lacks the adjacent lateral sclerites of the Yarms and the median sclerite in ventral aspect. In S. dabieshana , the sensilla basiconica patch of tergum 10 appears fused in older specimens, at most partly divided medially in teneral specimens (Figs. 1b, 2e), but never forming an U-shaped membranous area at posterior margin of T10 near the paraproct tip (Figs. 3a and fig. 5 in Stark & Sivec 2008)