Neoperla hajeki, Wang & Li & Li, 2022

Wang, Yingying, Li, Wenliang & Li, Weihai, 2022, Two new species and records of Neoperla (Plecoptera, Perlidae) from Yunnan, China, ZooKeys 1092, pp. 1-18 : 1

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Neoperla hajeki

sp. nov.

Neoperla hajeki   sp. nov.

Figs 3 View Figure 3 , 4 View Figure 4 , 5 View Figure 5

Type material.

Holotype: male ( NMP), China: Yunnan Province, Baoshan City, Zizhi Village, 29.VI-2.VII.2016, 25°43.7'N, 98°34.1'E, 1995 m, light trap, leg. J. Hájek and J. Růžička. Paratypes: 9 females ( NMP), 1 male and 3 females (HIST), 1 male and 2 females ( HNHM), same date as holotype.


This species is characterized by a small dark marking over the ocellar area and a dark brown stigma before the M-line. The male of new species is characterized by an S-shaped aedeagal tube and by a sac bearing a subapical triangular patch of spinules in dorsal aspect.


Adult habitus (Figs 3 View Figure 3 , 5 View Figure 5 ). General body color brown. Head general pale brown, a small dark marking covers ocellar area, with a dark brown stigma before M-line. Head slightly wider than pronotum; compound eyes blackish, antenna dark brown except the basal segment yellowish (Figs 3A View Figure 3 , 5A View Figure 5 ), palpi pale brown. Distance between ocelli narrower than the diameter of ocellus and a small marking between ocelli dark brown. Pronotum yellow, with rugosities and a strip-like midline (Figs 3A View Figure 3 , 5A View Figure 5 ). Wings hyaline, veins brown; legs brown, basal part of femur dark brown, with wider yellow bands in mid- and hind legs (Figs 3B View Figure 3 , 5B View Figure 5 ). Cerci yellowish (Figs 3D View Figure 3 , 5B View Figure 5 ).

Male (Figs 3 View Figure 3 , 4 View Figure 4 ). Forewing length 9.1-9.3 mm, hind wing length 7.9-8.1 mm. Process of tergum 7 sclerotized and triangular, with a nipple-like apex and covered with small sensilla basiconica (Fig. 3B, D View Figure 3 ). Tergum 8 with a median plump mound and a few sensilla basiconica, mostly covered by the process of tergum 7. Tergum 9 with two separated mesal projections covered by sensilla basiconica and hairs. Hemitergal processes of tergum 10 finger-like in shape, slightly curved medially in dorsal aspect, apex acute (Fig. 3B, D View Figure 3 ).

Aedeagus. Aedeagal tube sclerotized, slightly S-shaped in lateral aspect. Sac short, ca 1/3 as long as the tube (Fig. 4 View Figure 4 ). Aedeagal sac bearing a subapical triangular patch of spinules in dorsal aspect (Fig. 4A View Figure 4 ), remainder bald except a few ventral spinules (Fig. 4B, C View Figure 4 ).

Female (Fig. 5 View Figure 5 ). Forewing length 9.3-9.6 mm, hind wing length 8.2-8.4 mm. General color pattern is similar to males. The subgential plate of sternum 8 is not produced posteriorly. Vagina large and apically slender, spiral and incurved, apical round, full of scaly spots. Spermatheca small, its origin in the terminal vagina.

Egg (Fig. 6 View Figure 6 ). Chorion length 346-348 μm, width 173-177 μm. Micropyles 3 with rims, placed ca 1/3 length near opercullum, each located between striae (Fig. 6A, F View Figure 6 ). Collar not distinctly stalked, but slightly constricted at base; width ca 79.5 μm at collar (Fig. 6D View Figure 6 ). Collar short, irregular in shape (Fig. 6D View Figure 6 ). Rim slightly flanged, margin irregularly scalloped. Chorion with striate on lid and collar. FCIs on lid distinct; cells with thin, smooth walls and floors punctuated (Fig. 6B, E View Figure 6 ).


The species is named after Dr Jiri Hájek for collecting the specimens.


China (Yunnan).


See ecology of Neoperla gaoligongshana   sp. nov.


The new species is a member of the N. clymene   group. Color pattern, pronotum, and male genital features are similar to Neoperla orissa   Stark & Sivec, 2015 from India. The new species can be easily separated from N. orissa   by the projection of tergum 7 and detail of the aedeagal sac armature. In N. hajeki   , the projection of tergum 7 is pointed in dorsal aspect, and the dorsal spines of the aedeagal sac are triangularly arranged. In N. orissa   , the slender and median projection of tergum 7 appears truncate in dorsal aspect, and the spines of the sac are arranged in several close-set rows.