Microperla qinlinga Chen, 2019,

Huo, Qing-Bo & Du, Yu-Zhou, 2019, Microperla qinlinga Chen reviewed with supplementary illustrations and the description of the nymph, Zootaxa 4706 (3), pp. 427-438: 428-429

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Microperla qinlinga Chen, 2019


Microperla qinlinga Chen, 2019 

Small size, body length 5.7–7.2 mm, forewing length 8.0–9.0 mm, hindwing length 7.0–8.0 mm. General color dark brown ( Fig. 2View FIGURE 2); body covered by fine setae, pores black. Triocellate, anterior ocellus very small. Gena pale brown. Pronotum width twice its length, dark-colored with rugosities ( Fig. 3View FIGURE 3).

Male: Abdomen with obvious lateral sclerites after emergence, two pale spots present on terga 1–3 ( Fig. 4View FIGURE 4). Anterior margin of tergum 10 strongly sclerotized, the sclerite becoming wider bilaterally; posteromedial half of tergum 10 sclerotized, curved upwards and forwards, terminal rounded and bearing several black setae ( Fig. 5View FIGURE 5). Aedeagus as a complex tridimensional structure, membranous, without any spines or sclerites. Aedeagus divided into three lobes: the basal lobe wide and possess a pair of “sheep horn-shaped” lateral arms; the middle lobe constricted ventrally with a pair of processes and the apical lobe expanded into two large lateral lobes and a small median-ventral lobe ( Fig. 6View FIGURE 6).

Female: Similar in habitus to male. Subgenital plate large and broad, posterior margin rounded with a median notch, variable, sometimes entire in some individuals ( Fig. 7View FIGURE 7).

Mature nymph: Body length ca. 5.8 mm. Gills absent. Body covered with pale hair. Head capsule wide approximately 1.1 mm. Anterior ocellus tiny, often indistinguishable ( Figs. 8–9View FIGURE 8View FIGURE 9). Lacinia short, fingerlike, with short brush on the inner edge; thin and ossified on apex with a row of serrations. Galea with a huge, developed crescent hairbrush. Mandible short, inner side with a basal tooth and two apical teeth; the first apical tooth shorter than M. brevicauda ( Uchida & Isobe 1989)  . A row of fine hairs between the second apical tooth to the basal tooth ( Fig. 10View FIGURE 10). Paraglossae shorter than glossae ( Fig. 11View FIGURE 11). Thoracic segments wide and rounded. Forewing pads almost triangular, short; forewing pads separated by a distance about 2X width, hindwing pads directly fused and not divergent from midline. Paraprocts short, nail shaped, covered with long setae ( Fig. 12View FIGURE 12). Cerci about 12 segments, half the length of the antennae, with setal fringe ( Fig. 13View FIGURE 13).

Material examined: 5♂♂, 8♀♀, 2 nymphs, China, Shaanxi Province, Xi’an City, Zhouzhi County, Qinling Mountains , Huaerping , 1280 m, 33°50.636′N, 107°49.969′E, 2019-IV-23, leg. Huo Qing-Bo, Shen YueGoogleMaps  ; 6 nymphs, Xi’an City, Zhouzhi County , Qinling Mountains , Heihe National Forest Park, 818 m, 33°53.406′N, 108°0.349′E, 2019-III-18, leg. Huo Qing-Bo, Zhao Meng-YuanGoogleMaps 


Remarks: Mature nymphs emerged on rocks along an unnamed river ( Figs. 14–15View FIGURE 14View FIGURE 15). It was observed that some emerging nymphs began to molt to adults exiting the river during the emergence peak ( Fig. 16View FIGURE 16). These pre-emergent adults were often swept away by the river current before successfully completing emergence. Fortunately, most emergent adults fully expanded their wings and moved safely to nearby dry rocks.