Perlodinella tibetensis Huo & Du, 2022

Huo, Qing-Bo, Du, Yu-Zhou, Zwick, Peter & Murányi, Dávid, 2022, Notes on Perlodinella Klapálek, 1912 (Plecoptera: Perlodidae) with a new species and a new synonym, Zootaxa 5162 (4), pp. 378-396 : 384-386

publication ID	https://doi.org/ 10.11646/zootaxa.5162.4.3
publication LSID	lsid:zoobank.org:pub:CCA1A3ED-BCF8-447E-B942-FD2144EAB273
DOI	https://doi.org/10.5281/zenodo.6816330
persistent identifier	https://treatment.plazi.org/id/59778C0E-376B-F152-03B7-FC34D7C2C6A1
treatment provided by	Plazi
scientific name	Perlodinella tibetensis Huo & Du
status	sp. nov.

Treatment

Perlodinella tibetensis Huo & Du sp. nov.

Adult habitus: General body color dark brown to black ( Figs. 12 View FIGURE 12 , 17 View FIGURE 17 ). Triocellate, anterior ocellus small, distance between posterior ocelli almost equal to width of the eyes. Head black, with a small yellowish spot around each ocellus and an oval yellowish spot between the posterior ocelli. Pronotum black with pale rugosities, without any median stripe ( Figs. 13 View FIGURE 13 , 19 View FIGURE 19 ). Legs brownish. Abdominal segments dark brown to black.

Male: Micropterous, forewing length 3–4 mm, hindwing length 2–3 mm, body length 11–13 mm (n = 6). Abdomen slightly sclerotized, bearing long yellowish hairs. Terga 8–9 without sensilla patches or sclerotized dots ( Figs. 14–16 View FIGURE 14 View FIGURE 15 View FIGURE 16 ). Tergum 10 yellowish and smooth medially; posterior margin heavily sclerotized, curved upward; sensilla basiconica arranged in a V-shape on the posterior margin ( Figs. 15E–F View FIGURE 15 , 16C View FIGURE 16 ). Paraproct divided into a subtriangular apical membrane with a typical sclerotized band, and a basic sclerite; apical half of the sclerite slender, hooklike, and curved outward, sharp on apex ( Figs. 15D View FIGURE 15 , 16C–D View FIGURE 16 ). The membranous epiproct bears sparse spines, divided into three isometric spherical lobes. The paired basal lobe swollen; apical lobe blunt apically ( Fig. 14C–E View FIGURE 14 ). Penis (partially everted) membranous, dorsal base bearing small asperities ( Fig. 15G View FIGURE 15 ).

Female: Coloration similar to males ( Fig. 17 View FIGURE 17 ). Macropterous, forewing length 14–15 mm, hindwing length 12–13 mm, body length 13–15 mm (n = 12) or brachypterous, forewing length 9 mm, hindwing length 7 mm, body length 14 mm (n = 1). Yellow spots between the hind ocelli and median occiput, at least two patterns present on females (see Fig. 19 View FIGURE 19 ). Wings pale yellowish to smoky gray, translucent; veins dark brown ( Figs. 17–18 View FIGURE 17 View FIGURE 18 ).

Abdomen dark brown; sterna yellowish laterally, with a pair of lateral dark spots; subgenital plate short and sclerotized, variable; median posterior margin heavily sclerotized and bilobate. There are four morphs of female subgential plates ( Figs. 20A–D View FIGURE 20 ), with the posterior margin with a small median extension ( Fig. 20A View FIGURE 20 ), posterior margin truncated ( Fig. 20B View FIGURE 20 ), posterior margin with small lateral processes ( Fig. 20C View FIGURE 20 ), and posterior margin M-shaped, the lateral process on each side longer and narrowed ( Fig. 20D View FIGURE 20 ).

Nymph: Unknown.

Egg: General color brown. Slender, trilateral, with three longitudinal ridges ( Fig. 21 View FIGURE 21 ). Collar is a short brown ring, cylindrical with a broad base. Anchor mushroom-shaped with massive stem, evenly covered with more small globular bodies. Each side of the egg with 4–6 short transverse rows of micropyles.

Under the observation by optical scopes, the egg of P. tibetensis has no obvious visible difference in shape or structure from P. kozlovi ( Fig. 21 A–D View FIGURE 21 ) except the small globular bodies near the basic anchor are darker than others ( Fig. 21 A View FIGURE 21 ).

Etymology: The scientific name is a Latin adjective derived from the name of Tibet where it is the most widespread Perlodinella known in this area.

Diagnosis: The new species can be distinguished by the completely black pronotum, the absence of sensilla basiconica on male tergum 9, V-shaped arrangement of sensilla basiconica on male tergum 10, and the outwardcurving male paraprocts.

Type materials: Holotype: 1 male, Tibet Autonomous Region, China, XZZB-20-66, Longdangbo , Qiongguo Township, Zhongba County, 2020-VII-23, 29.769472°N, 83.926753°E, 4556 m GoogleMaps . Paratypes: 4 males, 3 females, the same locality and data as the holotype GoogleMaps ; 2 males, 3 females, XZRT-20-79, Rutog Town , Rutog County, 2020-VII-25, 33.302156°N, 79.691631°E, 4288 m GoogleMaps ; 1 male, 2 females, XZGE-20-83, Jiamu River (riverside grassland, under the rocks), Shiquanhe Town , Gar County, 2020-VII-27, 32.436056°N, 80.203581°E, 4340 m GoogleMaps ; 1 female, XZGE-20-84, Yanhu Township, Gar County, Tibet 301 Provincial Highway North (Riverside grassland), 2020-VII-27, 32.403392°N, 82.407339°E, 4344 m GoogleMaps ; 7 males, 5 females, XZCQ-20-96, Meiduo Village, Quluo Township , Coqen County (riverside grassland, under the rocks), 2020-VII-29, 30.655397°N, 85.131839°E, 4751 m GoogleMaps . Leg. Wang LuYu , Liu Piao, Yuan Tao, Hou Yan-Meng .

Distribution: China (Tibet).

Remarks: Adults of Perlodinella tibetensis occur in groups under rocks along the shoreline ( Fig. 22 View FIGURE 22 ). This species is distributed in the southwestern Tibet, while P. kozlovi only known in the junction of eastern Tibet with Sichuan and Qinghai ( Fig. 23 View FIGURE 23 ).