Indonemoura yingjiangensis Bai & Qian, 2022

Bai, Xue, Shen, Dan & Qian, Yu-Han, 2022, Two new species of Indonemoura (Plecoptera, Nemouridae) from Yunnan Province, China, European Journal of Taxonomy 823 (1), pp. 1-9 : 2-4

Indonemoura yingjiangensis Bai & Qian sp. nov.

urn:lsid:zoobank.org:act:849FC3EE-6E39-40EB-A7D4-0505721927F9

Fig. 1

Diagnosis

The new species is very special and can be distinguished from all other Indonemoura species by the platy median lobe of paraproct that twisted at middle portion and apex truncatus with some tiny spines. This new species appears similar to In. spirocornua in having a similar epiproct and a twisted median lobe. However, the new species can be separated from In. spirocornua by the characteristic of median lobe and outer lobe of paraproct with a black spine located at ca ¼ of apex. In In. spirocornua , the median lobe forming an evenly out-curved, spine-like structure, apex bifurcate with two hooks of different size, the larger one spiral; and the outer lobe with a tiny ventroapical spine (Li et al. 2017: figs 6–7, 10). The similar long outer paraproctal lobe occur in In. trichotoma . However, in In. trichotoma , outer lobe forming a large hook with sharp tip, without spines at ca ¼ of apex; median lobe well developed, prolonged with two darkly sclerotized spines curved outward, and the hypoproct has spines apically (Li & Yang 2008: figs 6–7, 10).

Etymology

The new species is named after the type locality, Yingjiang County.

Material examined

Holotype CHINA • ♂; Yunnan Province, Dehong Dai and Jingpo Autonomous Prefecture , Yingjiang County, Tongbiguan Township ; 24°37′14″ N, 97°38′19″ E; 1351 m a.s.l.; 10 Jan. 2019; Chong-Xin Xie, Yu-Han Qian, Jin-Hong Xiang and Li Fu leg.; SWFU.

Paratype CHINA • 1 ♂; same collection data as for holotype; SWFU .

Description

Male

MEASUREMENTS. Holotype: body length 9.8 mm; forewing length 10.9 mm; hindwing length 9.0 mm.

HEAD ( Fig. 1A ). Head dark brown; three ocelli; compound eyes black and protruded; antennae slender and dark brown, with abundant decumbent pubescence; head slightly wider than pronotum; mouthparts light brown.

THORAX ( Fig. 1A–B ). Weak sclerotized; pronotum slightly brown with rugosities; obvious nodules in cervical gills pale; Legs light brown and with a dark brown band on the middle and anterior of femora.

WINGS ( Fig. 1A ). Macropterous; wings light brown and membrane translucent, veins brown.

ABDOMEN ( Fig. 1A, C ). Abdominal segments weakly sclerotized, slightly brown. Tergum 9 weakly sclerotized, median slightly concaved and more sclerotized, mid-posterior membranous and with sparse tiny spines. Tergum 10 weakly sclerotized, median membranous and concaved below epiproct along with some tiny spines on both sides. Cerci with abundant long hairs, cylindrical and membranous, without spines.

GENITALIA ( Fig. 1C–E ). Vesicle of sternum 9 mostly membranous, claviform and slightly constricted basally. Hypoproct exceptionally long and broad, apex gradually narrowed and with rugosities, apex rounded. Epiproct long, basal and lateral sclerites sclerotized, centre and apex membranous in dorsal view, apex gradually narrowed, a triangular ventral sclerite in the median portion of apex; epiproct upward, basal ventral membranous, apex beak-shaped in lateral view, ventral sclerite convex and forming a carina, with sparse tiny spines on the apex of keel. Paraproct divided into three lobes; inner lobe covered by hypoproct, long triangular sclerite; median lobe platy and long, length 3 × inner lobe, slightly twisted at middle portion, basal weakly sclerotized, gradually strong sclerotized to terminal, apex truncation with some tiny spines; outer lobe basal part elongated and recurved dorsally alongside cerci, terminal part slender and strong sclerotized, longer than median lobe in lateral view, apex rounded and with a black spine, another black spine located at near the ¼ of apex.

Female

Unknown.

Distribution

China: Western Yunnan Province.

Figures

Fig. 1. Indonemoura yingjiangensis Bai & Qian sp. nov., holotype, ♂ (SWFU). A. Habitus, dorsal view. B. Head and prothorax, ventral view. C. Terminalia, dorsal view. D. Terminalia, ventral view. E. Terminalia, lateral view.