Etrocorema wui Wang, Wang & Li, 2024

Wang, Yingying, Wang, Guoquan & Li, Weihai, 2024, A new species of Etrocorema from Yunnan, China, with a redescription of the male of E. hochii (Wu, 1938) (Plecoptera: Perlidae), Zootaxa 5492 (1), pp. 129-134 : 130

Etrocorema wui Wang, Wang & Li , sp. nov.

( Figs. 1–2 )

Adult habitus. ( Fig. 1 ). General body color brown. Distance between ocelli about 2.5X as diameter of each ocellus. Head brown, with a big brown hexagonal stigma interrupted by pale M-line; tentorial callosities distinct, yellow and elongate-oval, about 2X longer than wide ( Fig. 1A ). Compound eyes large and black; antennae and maxillary palpi brown ( Fig. 1A ). Pronotum brown, as wide as head, with darker rugosities, posterolateral corners rounded. Wings membrane brownish with darker veins; legs brown but basal half of femora paler.Abdomen pale to brownish, terminal segments dark brown, covered with hairs ( Figs. 1B–C ).

Male. ( Figs. 1–2 ). Forewing length 13.8 mm, hindwing length 12.1 mm.Tergum 7 with sparse sensilla basiconica on posterior margin, tergum 8 with two patches of sensilla basiconica ( Figs. 1C–D ). Hemitergal lobes of tergum 10 finger-like, strongly curved laterally, reaching posterior margin of tergum 9, apex obtuse covered with small sensilla basiconica ( Figs. 1C–D ). Sternum 6 with a patch of strong setae medially ( Fig. 1B ). Aedeagus weakly sclerotized, curved ventrally, subapical shrinked, apex expanded, L-shaped and with sparse fine spinules ( Fig. 2A ). Aedeagus with a brown sclerite subapically in ventral view, apex elliptical with complete ring of larger spines ( Figs. 2B–C ).

Female. Unknown.

Type material. Holotype: male ( CAUC), China: Yunnan Province, Honghe Hani and Yi Autonomous Prefecture , Luchun County, Huanglian Mountains , Xiaoheijiang , N 22.7242°, E 102.3284°, 2018.I.29, Xingyue Liu leg., light trap.

Etymology. The species is named after Dr. Chen-Fu Wu in memory of his contribution to stonefly research in China.

Distribution. The species was collected at light in the regions of the Huanglian Mountains, Yunnan Province, China.

Remarks. The male of the new species is characterized by an L-shaped aedeagus and a brown sclerite on the ventral surface of the aedeagal sac. It is most similar to E. yunnanensis from Mengla County, Yunnan Province, in sharing a similar head pattern, leg pattern and external terminalia. In E. yunnanensis , the head has a triangular stigma which is dark from the pale M-line to the ocelli and the aedeagal tube is straight and lacks a ventral sclerite on aedeagal sac (see figs. 2a, 5 in Chen, 2020). The hexagonal stigma on the head of E. wui is larger than in E. yunnanensis . Though E. hochii shares a similar head pattern with E. wui , it lacks the sensilla basiconica on tergum 7 of E. wui .

Figures

FIGURE 1. Etrocorema wui sp. nov. (male). A. Head and pronotum, dorsal view; B. Terminalia, ventral view; C. Terminalia, dorsal view; D. Hemitergal lobes, dorsal view.

FIGURE 2. Etrocorema wui sp. nov. (male). A–B. Aedeagus, lateral view; C. Aedeagus, caudal view.