One new species and one poorly known species of Neoperla in the montivaga group (Plecoptera: Perlidae) from Hainan Province, China Mo, Raorao Wang, Guoquan Li, Weihai Zootaxa 2021 2021-07-20 5004 2 385 394 46PQ8 P.Zwick 1977 [366,611,402,429] Insecta Perlidae Neoperla Animalia Plecoptera 8 393 Arthropoda species montivaga    1. Hemitergal processes of tergum 10 long, nearly extending over tergum 9 (see figs. 1c, 2a–2b in Mo et al. 2020)....................................................................................................  N. longispina  - Hemitergal processes of tergum 10 short, normal length....................................................... 2   2. Process of tergum 7 truncate, apex is not triangular or trapezoidal............................................... 3  - Process of tergum 7 is triangular or trapezoidal.............................................................. 4   3. Aedeagal sac ventrally has two basal spinulose patches and a mesal bare lobe (see figs.1b–1e, 2 in Kong et al. 2014)...................................................................................................  N. baisha  - Aedeagal sac ventrally has a pair of small, lateral spinous lobes and two large, mesal, spherical lobes, one of them has spines and one is bare (see fig. 14–16 in Chen & Du 2016).................................................  N. sexlobata   4. Process of tergum 7 is trapezoidal........................................................................ 5  - Process of tergum 7 is triangular......................................................................... 6   5. Trapezoidal process of tergum 7 has a pair of lateroapical subuliform lobes (see fig. 3 in Yang & Yang 1995).......................................................................................................  N. bicornuta  - Trapezoidal process of tergum 7 has not lateroapical subuliform lobes ( Fig. 6b; see fig. 4 in Yang & Yang 1995)...................................................................................................  N. hainanensis   6. Aedeagus double curved, shows an S-shaped curve in lateral view (see figs. 3c in Kong et al. 2014)...........  N. bicurvata  - Aedeagus relatively straight without double curve........................................................... 7   7. Aedeagus has an elongate ventral projection and a pair of dorsal spinose projections at middle (see figs. 5d, 6 in Kong et al. 2014)..................................................................................  N. furcomaculata  - Aedeagus only has a low ventral spinose projection at middle or a pair of basal dorsolateral spinose projections.......... 8   8. Aedeagal tube bears a pair of basal dorsolateral lobes (see figs. 7, 8 in Chen & Du 2016)..................  N. wuzhishana  - Aedeagal tube has a low ventroapical lobe ( Figs. 2c–2e, 3c–3e)................................  N. limushana  sp. nov.