Rhopalopsole jizushana, Mo & Wang & Yang & Li, 2018

Mo, Raorao, Wang, Guoquan, Yang, Ding & Li, Weihai, 2018, Two new species of the Rhopalopsole magnicerca group (Plecoptera: Leuctridae) from China, Zootaxa 4388 (3), pp. 444-450 : 447-449

Rhopalopsole jizushana sp. nov.

( Figs. 3 & 4 )

Description. Forewing length ca. 6.5 mm. Head ( Fig. 3a ) dark brown with small irregular darker markings, wider than pronotum; compound eyes black; antennae brown; pronotum ( Fig. 3a ) brown, subquadrate, all angles obtuse and surface with black irregular rugosities. Thorax brown; wings light grayish brown and veins brown; legs brown. Abdomen brown with terminalia dark brown.

Male ( Figs. 3 & 4 ). Tergum 9 ( Figs. 3b & 4a ) moderately sclerotized except with a weakly sclerotized narrow longitudinal medial strip and a pair of strongly sclerotized paramedial bands which covered by dense tubercles at mid-posterior margin of tergum 9, distinctly protruding and overhanging anterior ⅓ of tergum 10. Sternum 9 ( Fig. 4b ) weakly sclerotized basally with tongue–like vesicle bearing dense hairs; subgenital plate broad, tip tongue–like and longer than wide. Tergum 10 ( Figs. 3b & 4a ) central plate with three fused portions: the lateral sclerites thin, triangular and strongly sclerotized; the mesal sclerite weakly sclerotized, with a strongly sclerotized bowl-shaped plate with tiny knobs at mid-posterior margin; transverse bars scalpel-like, distinctly sclerotized; lateral projections ( Figs. 3c , 4a–4c ) moderately sclerotized, slightly upcurved and nearly parallel-sided, acute in lateral view and basally subquadrate and gradually tapering to a sharp ending. Cercus ( Figs. 3b–3c , 4a–4c ) long, upcurved, rounded apically without an apical spine, abruptly constricted subapically. Epiproct small, apically forming a strongly upcurved hook, the dorsal apex of the epiproct appears darkly sclerotized ( Figs. 3b & 4a ), appearing erect as a sharp point in lateral view, in caudal view generally triangular with an acute apex ( Figs. 3c , 4c–4d ). Subanal lobe ( Figs. 3c–3e , 4b–4c ) nearly subquadrate in ventral view but triangular in lateral view; medially upturned, with distinct longitudinal furrows and two distinctly sclerotized, apically convergent, triangular lateral flaps; the tip of subanal lobe in caudal view with a darkly sclerotized lip-like structure, oval in ventral view.

Female. Unknown.

Type Material. Holotype male ( HIST): China, Yunnan Province, Dali County, Jizu Mountain, Biyun Temple , inflow stream above Yulong Falls , N25°58.125' E100°21.373', 2200m, 24-VII-2017, leg. W.H. Li.

Etymology. The specific name refers to Jizu Mountain where the new species was collected.

Distribution. China, Yunnan Province.

Remarks. Rhopalopsole jizushana is also a typical species of R. magnicerca group sensu Sivec et al. (2008). The male of the new species is characterized by a pair of subquadrate paramedial bands that distinctly protrude and overhang the anterior ⅓ of tergum 10, by the subquadrate subanal lobe with large triangular lateral flaps in ventral view, and with a darkly sclerotized lip-like structure in caudal view. With the exception of R. sapa Stark & Sivec, 2012 ( Stark et al. 2012), other species of the group the posterior margin of tergum 9 is truncate ( Sivec et al. 2008, Chen & Du 2017, Li & Yang 2012, Li et al. 2017, Qian & Du 2013). However, R. sapa has an entire central plate and lateral projections of tergum 10 with truncate tips. The parallel-sided lateral projections also occur in R. emeishana , a species also recorded from Shaanxi, Sichuan, and Yunnan provinces of China. However, R. emeishana has the posterior margin of tergum 9 truncate, whereas that of R. jizushana is distinctly protruding.

Figures

FIGURE 3. Rhopalopsole jizushana sp. n. (male). a. Head and pronotum, dorsal view; b. Terminalia, dorsal view; c. Terminalia, lateral view; d. Subanal lobe, ventral view; e. Subanal lobe, caudal view.

FIGURE 4. Rhopalopsole jizushana sp. n. (male). a. Terminalia, dorsal view; b. Terminalia, ventral view; c. Terminalia, lateral view; d. Epiproct, caudal view.