Rhopalopsole magnispina Li, Yang & Li, 2022

Li, Wenliang, Zhang, Yao, Yang, Ding & Li, Weihai, 2022, Rhopalopsole magnispina sp. nov., a new species of Leuctridae (Plecoptera) from China, with notes on R. horvati Sivec & Harper, 2008, Zootaxa 5141 (1), pp. 94-100 : 96

Rhopalopsole magnispina Li, Yang & Li , sp. nov.

( Figs. 2–4 )

Male. Forewing length 6.0– 6.3 mm (n=2). Head brown to blackish, slightly wider than pronotum; compound eyes black; antennae brownish to brown, scape darker. Pronotum brown, surface with light brown longitudinal median stripes, corners obtuse, posterior portion slightly widened; wings membrane subhyaline, veins brown; legs brownish to brown. Abdomen brown, terminalia dark brown.

Terminalia. Tergum 9 sclerotized, anterior margin with heavily sclerotized, posteromedial portion produced in darkly sclerotized protrusion which is trilobed with three similarly sized apical triangular sclerites, each covered by dense black scales ( Figs. 2a , 3a ). Subgenital plate of sternum 9 slightly wider than long and rounded apically, basally with an oval hirsute vesicle ( Figs. 2b , 3b ). Tergum 10 central plate with three separated sclerites, the mesal sclerite depressed and less sclerotized, posterior portion covered with a few hairs; transverse bars triangular, with a regular row of dense long hairs near outer margin ( Figs. 2a , 3a, 3c ). Lateral projections of tergum 10 a long and sclerotized spine-like plate which terminates in an acute point in lateral aspect, and the projections appearing as similar outline in dorsal, ventral and lateral views ( Figs. 2a , 3a, 3f ). Cercus curved upcurved medially in the usual manner, without apical spine ( Figs. 2a, 2c ). Epiproct flattened, regularly widened to arcuately notched apex ( Figs. 2a , 3a, 3c–3e ). Subanal lobe of large for genus, distinctly sclerotized, strongly upcurved apically at midlength, dorsal and ventral aspects each with two large curved hooks; the dorsal portion clearly bipartite, with two membranous finger-like apical lobes, in lateral and caudal view, and the mesoventral portion bears a pair of darkly sclerotized nipple-like projection ( Figs. 2a–2b , 3a–3b , 4 ).

Female. Unknown.

Type material. Holotype male ( HIST): China, Sichuan Province, Dujiangyan city, Qingchengshan , 1020 m, 30.8283 N, 103.7836 E, 2011.IV.15, leg. Xiaoli Duan. Paratype: 1 male ( CAU), China, Sichuan Province, Liangshan Prefecture, Mianning County, Zhilei Nature Reserve , 2544 m, 28.9189 N 102.22300 E, 2019.VII.25, malaise trap, leg. Zhudong Liu and Zhiming Li.

Etymology. This specific name refers to the large spines on the subanal lobe.

Distribution. China: Sichuan Province.

Remarks. Rhopalopsole magnispina sp. nov. is a typical member of R. shaanxiensis group as proposed by Sivec et al. (2008) with strongly ornamental tergum 9 and large and complex subanal lobe. This species can be easily distinguished from other members of the group by the large hook-like spines on subanal lobe, trilobed posteromedial portion of tergum 10, and widened epiproct with arcuately incised apex.

Figures

FIGURE 2. Rhopalopsole magnispina sp. n., male. a. terminalia, dorsal view; b. terminalia, ventral view; c. terminalia, lateral view.

FIGURE 3. Rhopalopsole magnispina sp. n., male. a. terminalia, dorsal view; b. terminalia, ventral view; c. central plate, transverse bars and epiproct, dorsal view; d. epiproct, anterolateral view; e. epiproct, caudal view; f. tergum 10, lateral view. cp=central plate, tb=transverse bars.

FIGURE 4. Rhopalopsole magnispina sp. n., male. a. subanal lobe, dorsal view; b. subanal lobe, ventral view; c. subanal lobe, dorsoapical view; d. subanal lobe, ventral lobe, caudal view; e. cleared subanal lobe, ventral view; f. cleared subanal lobe, ventrolateral view.