Neoperla quadrispina, Li & Mo & Wang, 2020

Li, Weihai, Mo, Raorao & Wang, Guoquan, 2020, Two new species of Neoperla montivaga group (Plecoptera: Perlidae) from Guangxi Zhuang Autonomous Region of southern China, Zootaxa 4718 (4), pp. 573-583 : 577-581

Neoperla quadrispina sp. nov.

( Figs. 6–7 )

Adult habitus ( Figs. 6–7 ). The head pale except for yellow and dark markings: a large yellowish brown median rhombolic area interrupted by pale M-line, and the small area between two ocelli surrounded by subsquare dark brown spots, and the distance between the ocelli subequal to the diameter of a single ocellus; the antennae brown but basal segments light yellow; pronotum pale yellow with median half brown with rugosities. Legs brownish; wings light brown, veins brown; cerci pale brown.

Male ( Figs. 6–7 ). Forewing length 8.4–8.9 mm. Hindwing length 7.0– 7.5 mm. Posterior process of tergum 7 nearly quadrate covered with dense dorsal and distal sensilla basiconica. Tergum 8 with an upward curved, tongueshaped process, with sensilla basiconica at apex. Tergum 10 with finger-like hemitergal process, medial portion distinctly curved forward, tip bluntly sharp. Aedeagal tube straight, apically with Y-shaped ventral lobe, with two black spines at the ends of each fork; the lobe generally straight and finger-like in lateral aspect.Aedeagal sac ca. 2X as long as the tube, distal two third abruptly curved ventrally, covered with many dark tiny spines at the triangular apex.

Female. Unknown.

Material examined. Holotype male ( HIST), China: Guangxi, Guigang City, Tianping Mountain National Forest Park, 210m, 2017.VIII.3, G.Q. Wang . Paratype: 1 male ( HIST) same locality and date as holotype .

Etymology. The specific name “quadrispina” refers to the four apical spines of the Y-shaped lobe of the aedeagal tube.

Distribution. China (Guangxi Zhuang Autonomous Region).

Remarks. The Y-shaped lobe of the aedeagal tube also demonstrate its placement in the diehli subgroup, including several species mentioned above and Neoperla delphina sp. nov.. However, the two spines at the ends of each fork of the Y-shaped lobe of Neoperla quadrispina sp. nov. could distinguish it from other species in this subgroup.

Figures

FIGURE 6. Neoperla quadrispina sp. nov. (male). a. Head and pronotum, dorsal view. b. Terminalia, dorsal view. c. Terminalia, lateral view. d. Aedeagal tube before everted, lateral view.

FIGURE 7. Neoperla quadrispina sp. nov. (male). a. Aedeagus, lateral view. b. Ventral lobes of aedeagus, oblique lateral view. c. Apical part of aedeagal sac, lateral view.