Perlodinella tibetensis Huo & Du 2022, sp. nov.
Creators: name: Huo, Qing-Bo
name: Du, Yu-Zhou
name: Zwick, Peter
name: Murányi, Dávid
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Perlodidae
Perlodinella
Perlodinella tibetensis

description: Perlodinella tibetensis Huo & Du sp. nov.
Adult habitus: General body color dark brown to black (Figs. 12, 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, 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). 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, 16C). 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, 16C–D). The membranous epiproct bears sparse spines, divided into three isometric spherical lobes. The paired basal lobe swollen; apical lobe blunt apically (Fig. 14C–E). Penis (partially everted) membranous, dorsal base bearing small asperities (Fig. 15G).
Female: Coloration similar to males (Fig. 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). Wings pale yellowish to smoky gray, translucent; veins dark brown (Figs. 17–18).
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), with the posterior margin with a small median extension (Fig. 20A), posterior margin truncated (Fig. 20B), posterior margin with small lateral processes (Fig. 20C), and posterior margin M-shaped, the lateral process on each side longer and narrowed (Fig. 20D).
Nymph: Unknown.
Egg: General color brown. Slender, trilateral, with three longitudinal ridges (Fig. 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) except the small globular bodies near the basic anchor are darker than others (Fig. 21 A).
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. Paratypes: 4 males, 3 females, the same locality and data as the holotype; 2 males, 3 females, XZRT-20-79, Rutog Town, Rutog County, 2020-VII-25, 33.302156°N, 79.691631°E, 4288 m; 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; 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; 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. 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). 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).
description: Published as part of 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, pp. 378-396 in Zootaxa 5162 (4) on pages 384-386, DOI: 10.11646/zootaxa.5162.4.3, http://zenodo.org/record/6810221