Amphinemura

Zhao, Meng-Yuan & Du, Yu-Zhou, 2021, Two new species of Amphinemura (Plecoptera: Nemouridae) from Taiwan Province on the southeast coast of China, Zootaxa 4969 (3), pp. 573-580 : 577-578

Key to males of Amphinemura species from Taiwan Province

1. Apex of epiproct with short flagellum or small projection..................................................... 2

- Epiproct with a long flagellum projected downward to a narrow apex, ventral sclerite forming a long triangular keel-shaped ridge extending ventrad and then posteriad, bearing a row of big black spines................ A. curvidens Shimizu, 1998

2. Apex of paraproct median lobe connected with the tip of outer lobe, median lobe broad basally and narrowed from the median to the apex, forming a finger-like tip with a row of spines near the tip ( Fig. 2 )................. A. reni Du & Zhao , sp. n.

- Apex of paraproct median lobe separated from the tip of outer lobe.............................................. 3

3. Outer lobe of paraproct dark, triangular basally and apically, narrowed medially, with 4–5 spines on the tip ( Fig. 7 )........

........................................................................... A. triquetra Zhao & Du , sp. n.

- Outer lobe of paraproct without triangular base or apex....................................................... 4

4. Pronotum punctured and pale brown or yellowish............................................................ 5

- Pronotum not punctured, dark brown with black spots; apex of epiproct with a short straight projection, ventral sclerite forming a semicircular keel-shaped ridge; median lobe of paraproct elongated and bent upward to a blunt tip, bearing several long spines........................................................................ A. seminigra Shimizu, 1998

5. Epiproct slender in dorsal view, apex slightly concave, forming a triangular projection with small spines; outer lobe of paraproct extending upward with 2 or 3 spines at the tip......................................... A. flavinotus Shimizu, 1997

- Epiproct almost oval in dorsal view, apex slightly concave, forming a short oblong projection, with a row of small spines; median lobe of paraproct with 6–7 long spines at the tip.................................. A. flavicollis Klapálek, 1912

Figures

FIGURE 2. Amphinemura reni Du & Zhao, sp. nov. Male terminalia, A: dorsal view; B: ventral view; C: lateral view; D: epiproct, dorsal view.

FIGURE 7. Amphinemura triquetra Zhao & Du, sp. nov. Male terminalia, A: dorsal view; B: ventral view; C: lateral view; D: epiproct and paraproct, caudal view.