Protarcys, Klapalek, 1912

Mo, Raorao, Li, Weihai & Murányi, Dávid, 2025, Protarcys Klapálek, 1912, the senior synonym of Neofilchneria Zwick, 1973 (Plecoptera: Perlodidae), Zootaxa 5618 (1), pp. 68-78 : 70

Key to males of species of Protarcys (male of P. lutescens Klapálek, 1912 unknown)

1. Hemitergal lobes about twice longer than wide.............................................................. 2

- Hemitergal lobes at least three times longer than wide........................................................ 4

2. Joint of the epiproct lever arm indistinct, not widened........................................................ 3

- Joint of the lever arm distinct, anterior portion swollen; epiproct tip not bifurcated (figs. 23 f–g in Zwick & Sivec 1980).................................................................................................. P. erberi

3. Hemitergal lobes tip rectangular; epiproct tip C-shaped; aedeagus unknown; Nepal, Sikkim, Xizang of China (figs. 23 d–e in Zwick & Sivec 1980)............................................................................ P. uncata

- Hemitergal lobes tip rounded; epiproct tip unknown; aedeagus with arrow-shaped dorsal armature, lacks lobes; Sichuan of China ( Fig. 2 )................................................................................. P. caudata

4. Hemitergal lobes distinctly upcurved; epiproct tip hook-shaped in lateral view (figs. 4a, e in Zhang et al. 2024)...... P. cheni

- Hemitergal lobes slightly upcurved, nearly touching each other; epiproct tip wavy in lateral view (fig. 5 in Chen 2019)............................................................................................... P. wanglanga

Figures

FIGURE 2. Protarcys caudata Klapálek, 1912 holotype, male genitalia A. Terminalia, dorsal view. B. same, lateral view. C. Aedeagus, lateral view. D. Hemitergal lobes and uneverted epiproct, dorsal view (epiproct tip lacking). E. Apical half of aedeagus, dorsal view. F. same, ventral view. Not to scale.