Neoperla perspicillata Zwick, 2021

Li, Wenliang, Wang, Yingying & Li, Weihai, 2021, A new species of Neoperla (Plecoptera: Perlidae) from Motuo County of Tibet China and redescription of Neoperla perspicillata Zwick, 1980, Zootaxa 4964 (1), pp. 169-178 : 173-174

Neoperla perspicillata Zwick

( Figs. 4–6 )

Redescription. Adult habitus. ( Fig. 4 ) Distance between ocelli wider than diameter of one ocellus. Head slightly wider than pronotum, reddish brown forward of M-line, and black posterior to M-line ( Fig. 4a ); compound eyes blackish, antenna yellow except terminal segments brown ( Fig. 4c ); palpi brown. Pronotum black, lateral margins lighter, with rugosities and strip-like midline ( Fig. 4a ); wings subhyaline, veins dark brown; legs black, basal part of femur yellow, the yellow bands wider in mid- and hindlegs ( Fig. 4c ). Cercus black, basal segments yellowishbrown ( Fig. 4b ).

Male. ( Figs. 4–6 ) Forewing length 11.8 mm, hindwing length 9.2 mm. Process of tergum 7 sclerotized, triangular with nipple-like apex, covered with small sensilla basiconica ( Fig. 4b ). Tergum 8 medially with a large trapezoid sclerite covered with several median spines ( Fig. 4b ). Tergum 9 with two separated mesal humps covered by sensilla basiconica and hairs. Hemitergal process of tergum 10 finger-like, slightly curved medially in dorsal view but nearly straight in lateral view ( Figs. 4b & 4d ). Aedeagal tube nearly straight, dorsal surface with two contiguous patches of tiny spines medially ( Figs. 5b & 5d ). Apex of aedeagal sac with a ventral patch and two lateral patches of larger spines ( Figs. 6a & 6b ); lateral surface of sac with a long and large patch of numerous small spines at subapcial region ( Fig. 6b ).

Examined Material. 3 males ( HIST), China: Tibet, Motuo, Beibeng , 2017. VI. 9, 930m, 29°14’57’’ N, 93°11’35’’E, Yang Qicheng .

Distribution. China (Tibet), India, Nepal.

Diagnosis and remarks. Our specimens agree well with descriptions and illustrations of N. perspicillata Zwick, 1980 , even details of aedeagal tube is identical (comparing Figs. 5c, 5d and figs. 26c, 26d, Zwick & Sivec 1980). Aedeagal sac is same as the redescription of N. perspicillata Zwick (comparing Fig. 6 and fig. 2, Li et al. 2019). Although specimens have concave pigment in the dark center of head which is different from the redescription by Li & Liu, the intensity and extent of the head pattern is variable in type series of N. perspicillata . So we think these specimens belong to N. perspicillata Zwick.

Figures

FIGURE 4. Neoperla perspicillata Zwick, 1980 (male) a. Head and pronotum, dorsal view. b. Terminalia, dorsal view. c. Adult habitus, dorsal view. d. Terminalia, lateral view.

FIGURE 5. Neoperla perspicillata Zwick, 1980 (male) a. Aedeagus before full version, ventral view. b. Aedeagus before full eversion, dorsal view. c. Aedeagus before full eversion, lateral view. d.Aedeagus before full eversion, basal half, dorsal view.

FIGURE 6. Neoperla perspicillata Zwick, 1980 (male) a. Aedeagus with everted sac, lateral view. b. Aedeagal sac, apical half, ventral view.