Neoperlops gressitti Banks, 1939

Mo, Raorao, Wang, Guoquan, Li, Weihai & Murányi, Dávid, 2020, Review of the Oriental genus Neoperlops Banks, 1939 (Plecoptera: Perlidae), Zootaxa 4763 (3), pp. 405-418 : 406

Neoperlops gressitti Banks, 1939

( Figs. 1–2 )

Neoperlops gressitti Banks, 1939 — Banks 1939: 445. (original description of the male and female from Guangdong and Jiangxi); Zwick 1984: 175. (comb. rev., redescription of male and female based on types); Sivec et al. 1988: 40. (synopsis); Du et al. 1999: 61 (checklist); Stark & Sivec 2008: 94. (note on possible conspecific with N. cheni ); Yang & Li 2018: 32. (catalog); Zhang et al. 2019: 3324. (complete mitochondrial genome from Fujian); DeWalt et al. 2020 (catalog).

Neoperla gressitti (Banks, 193)— Illies 1966: 267. (comb. n., catalog).

Material examined. 1 male ( HIST): CHINA, Guangxi Zhuang Autonomous Region, Nanning City, Wuming County, Liangjiang Town, Neichao village, 23°29.664' N, 108°21.622' E, 230 m, 2014.V.10, G.Q. Wang.

Distribution. China, described from Guangdong and Jiangxi Provinces, on the basis of two males and two females ( Banks 1939), recently reported from Fujian Province ( Zhang et al. 2019) and herein from Guangxi Zhuang Autonomous Region.

Remarks. Zwick (1984) presented a redescription, including the everted aedeagus of N. gressitti based on type material. The head ocellar pattern and the main aedeagal armatures of the present Guangxi male generally agree with the types, in addition to the identical external terminalia. Slight differences in the aedeagus of the Guangxi male include a larger trapezoidal dorsomedial process in lateral view; in dorsal aspect the process is bilobed ( Figs. 2a , c–f). The basal half of aedeagus in the type seems twisted ( Zwick 1984: fig. 2g). These differences may be due to the preserved condition of the aedeagus. Herein, we present color illustrations of external features and everted aedeagal structures to assist further identification of the species ( Figs. 1–2 ). The specimens recently listed from Fujian ( Zhang et al. 2019) may refer to N. huanghuye , described from the same area (Wuyishan). Further molecular studies are needed to confirm identity of the three, apparently closely related species of the gressitti group.

Figures

FIGURE 1. Neoperlops gressitti Banks, 1939 (male). a. Head and pronotum, dorsal view. b. Terminalia, dorsal view. c. Hemitergal lobes, dorsal view. d. Hemitergal lobes, lateral view. e. Hemitergal lobes, oblique lateral view.

FIGURE 2. Neoperlops gressitti Banks, 1939 (male). a. Partially everted aedeagus, dorsal view. b. Partially everted aedeagus, ventral view. c. Partially everted aedeagus, lateral view. d. Aedeagus, lateral view. e. Lobes of aedeagal tube, lateral view. f. Lobes of aedeagal tube, oblique dorsal view. g. Aedeagal sac, lateral view.