Isoperla eximia Zapekina-Dulkeit, 1975

Huo, Qing-Bo, Chen, Zhen-Ning, Kong, Xiang-Bo & Du, Yu-Zhou, 2020, New records and a confirmation of three perlodid species in China, with additional notes and images of Rauserodes epiproctalis (Zwick, 1997) (Plecoptera: Perlodidae), Zootaxa 4808 (3), pp. 455-474 : 457-458

Isoperla eximia Zapekina-Dulkeit, 1975

Isoperla eximia: Zapekina-Dulkeit, 1975 , Tr. Gosud. Sapow. “Stolby”, 10:211.

Isoperla eximia: Teslenko & Zhiltzova, 2006 , Zootaxa, 1130:1–33.

Isoperla eximia: Teslenko & Bazova, 2009 , Entomol. Rev., 89(9):1063.

Isoperla eximia: Teslenko & Zhiltzova, 2009 , Russian Academy of Sciences, Vladivostok: Dalnauka, 272.

Isoperla eximia: Judson & Nelson, 2012 , Zootaxa, 3541:47.

Isoperla eximia: Yang & Li, 2018 , Species Catalogue of China. Vol. 2. Animals, Insecta (III), Plecoptera , 49.

Diagnosis: Male head mostly yellowish except area between posterior ocelli to occiput brown; antennae, palpi and cerci brown. Head without pale occipital mark, Pronotum disc yellowish medially and dark brown rugosities present laterally; middle of mesoscutum paler than sides. Paraprocts unciform, strong and heavily sclerotized. Vesicle on sternum 8 developed and hairy ( Figs. 5–6 ). Aedeagus mostly membranous; aedeagal sclerite basally less wide, not distinctly crested; apex with few fine grooves ( Fig. 7 ).

Distribution: China (Jilin Province), Mongolia, Russia.

Material examined: 1 ♂, China, Jilin Province, Research Station of Changbai Mountain Forest Ecosystem , ca. 42.38°N, 128.11°E ( UTM: 52 N 426732 4692352), 2005-VIII-1, leg. Wang Zhi-Jie.

Remark: A nymph of I. eximia collected in China (Yuhualin Area, Antu Country, Jilin Prov., Chanbai Mnts., Erdaobaine R., 1770 m above sea level, 30. IV 1994, Eu. Makarchenko, 1 nymph) was indicated by Teslenko & Zhiltzova (2006), but not mentioned by Teslenko & Zhiltzova (2009) and Judson & Nelson (2012). Yang & Li (2018) indicated that this species was known from “northeast of China ” citing Teslenko & Zhiltzova (2009) and Judson & Nelson (2012). With the inclusion of I. eximia , 13 species of Isoperla are now known to occur in China ( Chen et al. 2019).

Figures

FIGURE 5. Isoperla eximia Zapekina-Dulkeit, 1975, male habitus.

FIGURE 6. Isoperla eximia Zapekina-Dulkeit, 1975, male.A: head and pronotum; B: terminalia with aedeagus everted, dorsal; C: terminalia with aedeagus everted, ventral; D: terminalia, ventral.

FIGURE 7. Isoperla eximia Zapekina-Dulkeit, 1975, aedeagal sclerite.