Flavoperla retusata Mo, Li & Wang, 2021

Mo, Raorao, Cao, Jinjun, Wang, Guoquan, Li, Weihai & Murányi, Dávid, 2021, Two new species of the genus Flavoperla (Plecoptera: Perlidae) from Guangxi China, Zootaxa 5032 (2), pp. 247-261 : 248-254

publication ID	https://doi.org/ 10.11646/zootaxa.5032.2.6
publication LSID	lsid:zoobank.org:pub:5C01DEE6-291F-4EF7-A10A-BBCA145A8ECA
persistent identifier	https://treatment.plazi.org/id/039BAC5A-FFBE-B945-FF0E-8243FBCAFE6D
treatment provided by	Plazi
scientific name	Flavoperla retusata Mo, Li & Wang
status	sp. nov.

Treatment

Flavoperla retusata Mo, Li & Wang View in CoL , sp. nov.

( Figs. 1–5 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 )

Adult habitus. Biocellate. Male adult color yellow in life, and paler in alcohol. Head pale with an M-shaped dark brown marking behind M-line, a triangular dark brown spot between ocelli, and with a smaller triangular dark brown spot in front of pale M-line; antennae brown; palpi pale brown; head slightly wider than pronotum ( Figs. 1a View FIGURE 1 , 4a View FIGURE 4 ). Pronotum brown, elliptical, with paler rugosities; corners obtuse. Wing membrane pale yellow, veins yellow; legs, abdominal segments and cerci yellow.

Male ( Figs. 1b–1f View FIGURE 1 , 2 View FIGURE 2 , 3 View FIGURE 3 ). Forewing length 9.1–9.4 mm (n=4). Hindwing 8.1–8.4 mm. Tergum 10 with triangular epiproct sclerite positioned between and caudad to paired sclerotized triangular spines, positioned posterolaterally ( Fig. 1b View FIGURE 1 ); epiproct sclerites with a small membranous triangular basal area. Paraprocts curved dorsally, triangular with blunt tip. Hammer brown basally with wing-shaped anterolateral extensions; apical half unpigmented and triangular in ventral view; apex slightly swollen, cylindrical in lateral view ( Figs. 1c–1e View FIGURE 1 , 2c–2d View FIGURE 2 ). Everted aedeagus ( Figs. 1f View FIGURE 1 , 2 View FIGURE 2 , 3 View FIGURE 3 ) membranous, tubular, with a pair of large rounded lobes in basolateral area and a pair of small swollen lobes in mediolateral area; dorsal surface of apical half and apical surface mostly covered with tiny pale brown spines; subapical part with a pair of smaller lateral lobes and a pair of ventral patches composed of tiny pale brown spines, and with a short ventral process; apical part with a short nose-shaped sclerite, a mustache-shaped sclerite, and a slender sclerite ( Figs. 1f View FIGURE 1 , 2 View FIGURE 2 , 3 View FIGURE 3 ).

Female ( Fig. 4 View FIGURE 4 ). Forewing length 10.3–10.5 mm (n=4). Hindwing length 9.3–9.5 mm. Habitus generally similar to male except body color darker. Abdomens of collected females full of mature eggs. Subgenital plate large, rectangular, slightly constricted subapically, with a deeply triangular posterior notch forming a pair of apical lobes with blunt tips, and reaching beyond midpoint of sternum 10. Sternum 9 slightly sclerotized, deeply emarginate posteromedially ( Fig. 4c View FIGURE 4 ). Sternum 10 poorly sclerotized.

Egg ( Fig. 5 View FIGURE 5 ). Length 367–439 μm, width 252–288 μm (n=4). Outline chicken egg-shaped with distinct opercu- lar line, widest towards collar end. Anchor mushroom-shaped with long tentacle-like projections, globular bodies evenly distributed and not grouped. Collar short and fully covered by anchor. Chorionic surface covered with shallow but distinct punctations throughout, pentagonal or hexagonal follicular cell impressions recognizable only on opercular end. Micropylar orifices sessile, much larger than chorionic punctations, set on subequatorial line.

Type material. Holotype: male ( HIST), CHINA: Guangxi Zhuang Autonomous Region, Nanning City , Wuming County, Liangjiang Town , Neichao Village , Longmugou River , 2020.V.18, N 23°29′39", E 108°21′36", 199 m, R. R. Mo, Y. Lai, Y.Y. Mo GoogleMaps . Paratypes: 1 male ( HIST), same data as holotype, 2020. GoogleMaps V.19; 2 females ( HIST), Guangxi Zhuang Autonomous Region, Nanning City , Wuming County, Liangjiang Town , Neichao Village , Neichao Hotel, light trap, 2020. V.21, N 23°29′32", E 108°21′29", 194 m GoogleMaps , R. R. Mo, Y. Lai, Y.Y. Mo ; 1 female ( HIST), same data as above, light trap, 2020. V.18; 2 males and 2 females ( HIST), same data as above, light trap, 2020. V.20.

Etymology. The specific name refers to the deep posterior notch of the subgenital plate of female sternum VIII, Latin “retusus” means notch.

Distribution. China: Guangxi Zhuang Autonomous Region, known from the foothills of the Damingshan Mts. A total of 37 rivers originate from Damingshan Mountain, irrigating farmland in Shanglin, Binyang, Wuming and Mashan Counties, as well as more than 30 hydropower stations. It is the most important water source center in central and western Guangxi.

Remarks. See comments below under F. yangi Mo, Li & Murányi , sp. nov.