Illiesonemoura weii Du & Ji, 2023

Wang, Zhi-Jie, Du, Yu-Zhou & Ji, Xiao-Yu, 2023, Three new species of Illiesonemoura Baumann, 1975 (Plecoptera, Nemouridae) from China, Biodiversity Data Journal 11, pp. 112020-112020 : 112020

Illiesonemoura weii Du & Ji sp. nov.

Materials

Type status: Holotype. Occurrence : recordedBy: Yu-zhou Du ; individualID: Insect collection of Yangzhou University (ICYZU), Jiangsu Province, China; individualCount: 1; sex: male; lifeStage: adult; occurrenceStatus: present; occurrenceID: B14BB907-D4A5-5748-876D-091C0125194E; Taxon : kingdom: Animalia ; phylum: Arthropoda ; class: Insecta ; order: Plecoptera ; family: Nemouridae ; genus: Illiesonemoura ; specificEpithet: weii; Location : continent: Aisa ; country: China; countryCode: CN; stateProvince: Sichuan; locality: a suburb of Kangding City, river near Enwei Pharmaceutical Factory ; minimumElevationInMeters: 3525; verbatimLatitude: 30.050000 N; verbatimLongitude: 101.566667 E; Identification: identifiedBy: Zhi-jie Wang, Yu-zhou Du & Xiao-yu Ji; Event: year: 2009; month: 7; day: 1; Record Level: language: en

Description

Male. Head brown, antennae slightly brown (Fig. 9 ); pronotum brown with dark brown stripes, anterior margin wider than posterior margin. A single unbranched cervical gill on each side of mid-line (Fig. 8 A). Wings subhyaline, with light spots, veins brown. Forewing length 5.9 mm, hind wing length 5.0 mm. Legs brown, the middle of femora slightly brown. Anterolateral margin of terga 1-5 sclerotised. Terga 6-9 sclerotised anteriorly, but concave mid-anteriorly. Tergum 10 sclerotised, with a pair of small knobs near mid-length at each side of mid-line, which is more distinct in lateral view, with a small oval membranous portion above the knobs. Hypoproct broad basally and tapering to the tip; vesicle plump, rectangular, length 2x width. Cerci light brown, bent inwards and upwards, with hairs (Fig. 8 B-C, Fig. 10 A and Fig. 11 A-C). Paraprocts divided into 2 lobes; inner lobe slightly sclerotised, short, sub-oval; outer lobe sclerotised, except inner margin, outer margin darkly sclerotised, broad basally, then slender, with a pointed tip (Fig. 11 B and E). Epiproct short and broad, stretching back in side view, with the tip curved down; dorsal sclerite with a pair of sclerotised curved bands each side of mid-line, extending forward. Median part of epiproct with a pair of transverse sclerotised stripes, bearing spinules laterally; ventral sclerite slightly sclerotised, forming a pair of ridges each side of mid-line, each bearing a row of spines (Fig. 10 B and Fig. 11 D).

Diagnosis

The male of this species is characterised by a pair of small knobs from tergum 10, outer lobe of paraprocts with a pointed tip and epiproct bearing spinules laterally. It is similar to I. tuberostyla ( Wu 1962) and I. bituberculata sp. nov. in the tumour-shaped epiproct. However, in I. tuberostyla , there is no portion extending from the epiproct anteriorly. It is similar to I. bituberculata in dorsal sclerite with a pair of sclerotised bent bands each side of mid-line. However, the length of the portion extending anteriorly is twice as long than that in I. bituberculata . Median part of dorsal sclerite in I. weii bears a pair of transverse sclerotised stripes, forming spinules laterally, which are absent in I. bituberculata .

Etymology

This new species is named in honour of Professor Wei Mei-Cai (Central South University of Forestry and Technology, Changsha, Hunan, China), a taxonomist of Chinese sawfly ( Hymenoptera , Symphyta ) for organising the biodiversity expeditions in Tibet, Qinghai and Sichuan.

Distribution

China: Sichuan Province.

Figures

Figure 8. Male of Illiesonemoura weii sp. nov. A cervical region in ventral view; B terminalia in dorsal view; C terminalia in ventral view.

Figure 9. Male of Illiesonemoura weii sp. nov. Adult, dorsal view.

Figure 10. Male of Illiesonemoura weii sp. nov. A terminalia in lateral view; B epiproct in lateral view.

Figure 11. Male of Illiesonemoura weii sp. nov. A terminalia in dorsal view; B terminalia in ventral view; C terminalia in lateral view; D epiproct in dorsal view; E paraproct (left) in lateral view.