Indonemoura sejila Liu, Yang & Li, 2024, sp. nov.
Creators: name: Liu, Dongxia
name: Yang, Ding
name: Li, Weihai
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Nemouridae
Indonemoura
Indonemoura sejila

description: Indonemoura sejila sp. nov.
(Figs. 1–3)
Adult habitus (Fig. 1a). General color brown to dark brown. Head dark brown, antennae uniformly brown to dark brown, palpi lighter; compound eyes black. Thorax brown to blackish; legs brown to dark brown, with yellow brown band on femora, the band on foreleg narrower; tibiae yellow brown, but apex gradually becoming darker, tarsi brown; forewing brown to dark brown with scattered light spots.
Male (Figs. 1–3). Forewing length 6.5–7.1 mm, hindwing length 5.8–6.2 mm (n=20). Tergum IX (Fig. 2a) sclerotized, distinctly constricted medially, bearing medially interrupted row of tiny black spines along midposterior margin. Sternum IX basally with claviform vesicle, about half length of hypoproct; hypoproct broad and rectangular at basal half, distal half triangular in outline, distally rounded (Fig. 2b). Tergum X mostly sclerotized, with anteromedial portion membranous (Fig. 2a). Cercus slightly sclerotized, nearly cylindrical with narrower tip, length ca. 2x width. Epiproct (Figs. 1b–d, 2c–d, 3a) long and recurved, nearly parallel-sided, with a weak subapical lateral constriction in dorsal view and a weak apical incision (Figs. 2d, 3d); ventral sclerite strongly sclerotized and nearly parallel-sided in lateral aspect, apically extending over dorsal sclerite forming a short upcurved flagellum (Figs. 2d, 3d). Paraproct inner lobe triangular and apex projecting near the base of epiproct (Figs. 1e, 3b); median lobe forming a sclerotized strip-like structure, mostly fused with inner lobe but with a short, isolated, narrow tip; outer lobe darkly sclerotized, generally adjacent to median lobe and club like; its apex curved dorsally and nipplelike (Figs. 1e, 2a–b).
Female (Figs. 1f, 2e). Forewing length 6.9–7.8 mm, hindwing length 5.8–6.9 mm (n=10). Sternum VII membranous, posteromedial portion with a darkly sclerotized hexagonal pregenital plate, about ¼ width of the segment. Sternum VIII with large trapezoidal sclerotized subgenital plate covering the entire length and ½ width, posterior margin barely reaching the anterior margin of sternum IX; paired paragenital plate is brown and generally triangular with curved margins, located at the posterolateral corner of the subgenital plate, inner portion fused with center of subgenital plate, which also can be seen through subgenital plate. Sternum IX heavily sclerotized, anteriorly forming a produced trapezoidal extension with a shallow anterior arcuate notch. Sternum X and paraprocts sclerotized and typical.
Type material. Holotype: male (CAU), China: Xizang, Linzhi, Sejilashan, 4030 m, 29.6167°N, 94.6053°E, Malaise trap, 2017.V.5-VI.5, leg. Qicheng Yang. Paratypes; 5 males and 5 females (CAU), same data as holotype; 16 males and 3 females (IZCAS & HIST), same locality, Malaise trap, 2014.VII.1-VIII.20; 20 males and 12 females, same locality, Malaise trap, 2017.VI.5 –2017.VIII., leg. Qicheng Yang.
Etymology. The name refers to Sejila Mountain, where the types were collected.
Distribution. Presently known only from the type locality, Sejilashan of southeastern Xizang.
Remarks. Indonemoura sejila is most similar to I. nigrihamita concava Li & Yao, 2017 (in Li et al. 2017b) described from Sichuan. However, the new species can be easily separated from I. n. concava by the median lobe of the paraproct that bears a sclerotized strip-like structure ending in a narrow tip and spineless ventral sclerite of the epiproct. For I. n. concava, the paraproct median lobe is spine-like with a hook-like apex and the ventral sclerite of the epiproct bears short black spines along an obscure ventral ridge (figs. 2e–f in Li et al. 2017b).
description: Published as part of Liu, Dongxia, Yang, Ding & Li, Weihai, 2024, New species and new records of Indonemoura (Plecoptera: Nemouridae) from Xizang of southwestern China, pp. 590-596 in Zootaxa 5512 (4) on page 591, DOI: 10.11646/zootaxa.5512.4.8, http://zenodo.org/record/13849236