Neoperla bimaculata, Li & Wang & Li, 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 : 170-172

publication ID	https://doi.org/ 10.11646/zootaxa.4964.1.9
publication LSID	lsid:zoobank.org:pub:AEBF9524-C133-4C63-893B-9ADAFCC44E80
DOI	https://doi.org/10.5281/zenodo.4706841
persistent identifier	https://treatment.plazi.org/id/FB53FB65-216C-081A-FF73-B1FFFB951AC3
treatment provided by	Plazi
scientific name	Neoperla bimaculata
status	sp. nov.

Treatment

Neoperla bimaculata View in CoL sp. nov.

( Figs. 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3 )

Adult habitus. ( Figs. 1a View FIGURE 1 & 2 View FIGURE 2 ) Brown species with black pattern. Head mostly black except pale brown frons, slightly wider than pronotum; compound eyes blackish, basal segments of antenna yellow, distal flagella black, palpi yellow. Distance between ocelli wider than diameter of an ocellus. Pronotum laterally with two large triangular black markings, the medial pale area resembling a sandglass ( Fig. 1a View FIGURE 1 ). Wings subhyaline, veins brown; legs dark brown with paler bands: forelegs: yellow band of femur incomplete, only distinct in ventral aspect, medial band of tibia obscure; mid- and hindlegs: medial band of femur and tibia widened, tarsi dark brown ( Fig. 2 View FIGURE 2 ). Cercus pale yellow, apical segments slightly darker ( Figs. 1c View FIGURE 1 & 2 View FIGURE 2 ).

Male ( Figs. 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3 ). Male forewing length ca. 7.1–7.9 mm, hindwing length 6.2–6.8 mm. Tergum 7 medially slightly sclerotized and upraised, extending in a triangular process on posterior margin, the process rounded apically and covered with small sensilla basiconica ( Figs. 1b & 1c View FIGURE 1 ). Tergum 8 with a few spinules anteromedially ( Fig. 1b View FIGURE 1 ). Tergum 9 with two lateral patches of several sensilla basiconica and hairs. Hemitergal process of tergum 10 slender, medially curved ventrally, apex blunt ( Figs. 1b & 1c View FIGURE 1 ).

Aedeagus ( Fig. 3 View FIGURE 3 ): aedeagal tube plump and nearly straight, with a Y-shaped mesoventral lobe. Distal portion on dorsum, and the distal part of the Y-lobe covered with small spines. The tube is short, ca. half as long as the sac ( Fig. 3 View FIGURE 3 ). Aedeagal sac basally nearly perpendicular to the tube, medially slightly curved. The dorsum and venter have four basal and paramedial patches of large spines.

Female. Unknown.

Type material. Holotype: male ( CAU), China: Tibet, Motuo, Beibeng , 29°14’45.11’’ N, 95°10’16.21’’E 790 m, 2017.VI.9, Wang Jianyun GoogleMaps . Paratypes: 2 males ( CAU & HIST), same locality, 29°14’45.11’’ N, 95°10’16.21’’E, 880m, 2018.VI.25, Light traps, Wang Liang GoogleMaps .

Etymology. The specific epithet is an adjective refering to two pronotal spots.

Distribution. China (Tibet).

Remarks. The new species is similar to Neoperla montivaga Zwick, 1977 in aedeagal tube and terga 7-10. However, their color pattern and pronotum differ much: general body color of the new species is yellowish-brown, but N. montivaga Zwick is dark brown. The pronotum of the new species has two black spots which don’t occur in that species. Additionally, in Neoperla bimaculata sp. nov., the mesoventral lobe of aedeagal tube is oblong and bifurcate medially whereas that structure is globular and entire in N. montivaga .