Illiesonemoura lulang Li, Yang, Li & Mo, 2024, sp. nov.
Creators: name: Li, Mengyu
name: Yang, Ding
name: Li, Weihai
name: Mo, Raorao
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Plecoptera
Nemouridae
Illiesonemoura
Illiesonemoura lulang

description: Illiesonemoura lulang sp. nov.
(Figs. 1–5)
Adult habitus. General color brown to dark brown (Figs. 1a–b). Head dark brown, antennae brown; pronotum brown to dark brown, anterolateral corners lighter, disc with distinct rugosities (Figs. 1c, 5a). One unbranched, short, triangular cervical gill present lateral to cervical sclerite (Fig. 1d). Wings subhyaline, forewings with many light spots, veins brown (Figs. 1a–b). Legs brown, distal third of femora darker (Figs. 1a–b).
Male. Forewing length 4.9–5.0 mm, hind wing length 4.1–4.2 mm (n=2). Tergum 9 sclerotized, posteromedian portion membranous (Figs. 2a, 3a). Tergum 10 mostly sclerotized except for a membranous area anterior to a heavily sclerotized posteromedian plate which are more prominent in dorsal aspect; the plate bears a pair of posterolateral spines and closely set knobs which are connected by an arcuate medial sclerite (Figs. 2a, 3a). Hypoproct broad basally and tapering to a small, narrow tip (Figs. 2b, 3b); vesicle plump, constricted basally, length 2X maximum width, ventral surface pale (Figs. 2b–2c, 3b). Cerci membranous, slender, and distinctly bent inward at basal fourth (Figs. 2b, 3b). Paraproct inner lobe sclerotized, short and small, nearly parallel sided (Figs. 2b, 3b); outer lobe broad basally, large and subtriangular, outer part curving dorsally, with outer margin darkly sclerotized, ending in a nipple like apex (Figs. 2b, 3b), medially with a dorsally directed, sclerotized finger like projection extended from outer margin near cerci (Figs. 2c, 3c). Epiproct short and broad in dorsal aspect; dorsal sclerite sclerotized, with a pair of closely set longitudinal sclerites near midline, extending and divergent anteriorly, forming two small projections at apex, which are more distinct in lateral and ventral views (Figs. 2a, 3a–3e); several wrinkles consisting of brown granules present between dorsal sclerites, ventral sclerites, and lateral arms (Figs. 4b–4d); lateral arms L-shaped in lateral aspect bearing spinules mesolaterally (Figs. 3d–3e, 4c–4d); ventral sclerite with a pair of darkly sclerotized ridges each bearing a row of 7–8 black spines and a medial sclerite between the ridges (Figs. 3d–3e, 4c–4d).
Female (Figs. 1b, 5a–d). Forewing length 6.1 mm, hind wing length 5.1 mm (n=1). Color pattern similar to males (Figs. 1b, 5a). Sternum 7 with large pregenital plate overhanging nearly half of sternum 8; posterior edge of the plate truncate (Fig. 5a). Sternum 8 with two large, brown, and subtriangular vaginal lobes on the posterior margin of pregenital plate; medial portion lacking sclerotization (Figs. 5b–c). Inner genitalia with a heart-shaped atrium situated beneath anterior half of pregenital plate. The atrium with a pair of narrowly separated kidney shaped sclerites, its membranous medial portion leading in a short ductus (Fig. 5d).
Type material. Holotype, male (CAU), China, Xizang Autonomous Region, Nyingchi City, Sejilashan Mountain, Lulang Town, 3875 m, 29.6386° N, 94.6984° E, 2020.VII.21, leg. Qicheng Yang. Paratypes: 1 female (CAU), same data as for holotype; 1 male (CAU), Xizang Autonomous Region, Nyingchi City, Sejilashan Mountain, Lulang ecological station, 3811 m, 29.6556° N, 94.7136° E, 2017.V.5–VI.5, leg. Qicheng Yang.
Distribution. China (Xizang).
Etymology. The specific name refers to Lulang Town where the type series were collected.
Remarks. The new species is characterized by a sclerotized, dorsally directed, finger like median projection on the outer paraproct lobe and a pair of longitudinal sclerites on the epiproct. The new species is most similar to I. bituberculata Wang & Du, 2023 from Sichuan Province in having similar projections on tergum 10, but the new species can be separated from the latter by the paraproct outer lobe having a finger like medial projection and epiproct having two apical projections (comparing Figs. 2c–2d, 3d–3e with figs. 3E–3G in Wang et al. 2023).
description: Published as part of Li, Mengyu, Yang, Ding, Li, Weihai & Mo, Raorao, 2024, A new species and new record of Nemourinae (Plecoptera: Nemouridae) from China, pp. 584-592 in Zootaxa 5523 (5) on page 585, DOI: 10.11646/zootaxa.5523.5.8, http://zenodo.org/record/13949949