Illiesonemoura lulang, Li & Yang & Li & Mo, 2024

Li, Mengyu, Yang, Ding, Li, Weihai & Mo, Raorao, 2024, A new species and new record of Nemourinae (Plecoptera: Nemouridae) from China, Zootaxa 5523 (5), pp. 584-592 : 585

publication ID	https://doi.org/ 10.11646/zootaxa.5523.5.8
publication LSID	lsid:zoobank.org:pub:4D1703FE-E24A-46FB-9A17-773FE14FAEEB
DOI	https://doi.org/10.5281/zenodo.13949944
persistent identifier	https://treatment.plazi.org/id/505F87CA-FFDE-FFD7-FF66-FF193334F98A
treatment provided by	Plazi
scientific name	Illiesonemoura lulang
status	sp. nov.

Treatment

Illiesonemoura lulang sp. nov.

( Figs. 1–5 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 )

Adult habitus. General color brown to dark brown ( Figs. 1a–b View FIGURE 1 ). Head dark brown, antennae brown; pronotum brown to dark brown, anterolateral corners lighter, disc with distinct rugosities ( Figs. 1c View FIGURE 1 , 5a View FIGURE 5 ). One unbranched, short, triangular cervical gill present lateral to cervical sclerite ( Fig. 1d View FIGURE 1 ). Wings subhyaline, forewings with many light spots, veins brown ( Figs. 1a–b View FIGURE 1 ). Legs brown, distal third of femora darker ( Figs. 1a–b View FIGURE 1 ).

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 View FIGURE 2 , 3a View FIGURE 3 ). 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 View FIGURE 2 , 3a View FIGURE 3 ). Hypoproct broad basally and tapering to a small, narrow tip ( Figs. 2b View FIGURE 2 , 3b View FIGURE 3 ); vesicle plump, constricted basally, length 2X maximum width, ventral surface pale ( Figs. 2b–2c View FIGURE 2 , 3b View FIGURE 3 ). Cerci membranous, slender, and distinctly bent inward at basal fourth ( Figs. 2b View FIGURE 2 , 3b View FIGURE 3 ). Paraproct inner lobe sclerotized, short and small, nearly parallel sided ( Figs. 2b View FIGURE 2 , 3b View FIGURE 3 ); outer lobe broad basally, large and subtriangular, outer part curving dorsally, with outer margin darkly sclerotized, ending in a nipple like apex ( Figs. 2b View FIGURE 2 , 3b View FIGURE 3 ), medially with a dorsally directed, sclerotized finger like projection extended from outer margin near cerci ( Figs. 2c View FIGURE 2 , 3c View FIGURE 3 ). 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 View FIGURE 2 , 3a–3e View FIGURE 3 ); several wrinkles consisting of brown granules present between dorsal sclerites, ventral sclerites, and lateral arms ( Figs. 4b–4d View FIGURE 4 ); lateral arms L-shaped in lateral aspect bearing spinules mesolaterally ( Figs. 3d–3e View FIGURE 3 , 4c–4d View FIGURE 4 ); 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 View FIGURE 3 , 4c–4d View FIGURE 4 ).

Female ( Figs. 1b View FIGURE 1 , 5a–d View FIGURE 5 ). Forewing length 6.1 mm, hind wing length 5.1 mm (n=1). Color pattern similar to males ( Figs. 1b View FIGURE 1 , 5a View FIGURE 5 ). Sternum 7 with large pregenital plate overhanging nearly half of sternum 8; posterior edge of the plate truncate ( Fig. 5a View FIGURE 5 ). Sternum 8 with two large, brown, and subtriangular vaginal lobes on the posterior margin of pregenital plate; medial portion lacking sclerotization ( Figs. 5b–c View FIGURE 5 ). 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 View FIGURE 5 ).

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. GoogleMaps Paratypes: 1 female ( CAU), same data as for holotype GoogleMaps ; 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. GoogleMaps

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 View FIGURE 2 , 3d–3e View FIGURE 3 with figs. 3E–3G in Wang et al. 2023).