Sisyrina, Banks, 1939

Yang, Ying & Liu, Xingyue, 2021, New spongillaflies of the genus Sisyrina Banks, 1939 (Neuroptera: Sisyridae) from the Oriental faunal region, Zootaxa 5052 (4), pp. 552-566 : 564

Key to species of Sisyrina

1. Antenna with several basal segments (seven or eight) darker than remaining ones.................................. 2

- Antenna with only scape and pedicel darker than flagellum.................................................... 4

2. Male gonocoxite 9 broad basally, rod-shaped distally and curved ventrad ( Fig. 8 )............. S. qiong Yang & Gao, 2002

- Male gonocoxite 9 long and elliptical......................................................................3

3. Antenna with basal eight segments black and remaining flagellomeres yellow; male gonocoxite 9 with a slender ventral spine distally and dorsal margin sinuous; female tergum 9 nearly 1.5 times as long as wide ( Smithers 1973: Figs. 1 , 3 )......................................................................................... S. tropica Smithers, 1973

- Antenna with basal seven segments dark brown and remaining flagellomeres pale yellow; male gonocoxite 9 with a thick distal ventral spine and dorsal margin rounded; female tergum 9 nearly twice as long as wide ( Monserrat 1981: Figs. 21–22; Smithers 1973: Figs. 2 , 4 ).................................................................... S. nirvana Banks, 1939

4. Female tergum 9 with dorsal margin nearly as long as posterodorsal margin; gonocoxite 9 slightly curved distally, nearly four times as long as wide ( Fig. 4D–E )......................................................... S. fashengi sp. nov.

- Female tergum 9 with dorsal margin nearly twice as long as posterodorsal margin; gonocoxite 9 abruptly curved distally into a hook-like apex, nearly three times as long as wide ( Fig. 5D–E )................................ S. vietnamica sp. nov.

Figures

FIGURE 1. Sisyrina fashengi sp. nov., holotype, male.A. Photograph of head, dorsal view; B. Habitus photograph, lateral view. Scale bar = 1.0 mm.

FIGURE 2. Photograph of fore- and hindwing of Sisyrina fashengi sp. nov., holotype, male. Scale bar = 1.0 mm.

FIGURE 3. Sisyrina fashengi sp. nov., holotype, male. A–B. Genitalia, lateral view (left: photograph; right: drawing); C–D. Same, dorsal view (left: photograph; right: drawing); E–F. Same, caudal view (left: photograph; right: drawing). S: sternum; T: tergum; cc: callus cerci; ect: ectoprocts; gst: gonostylus; gx: gonocoxite; hyp: hypandrium. Scale bar = 0.2 mm.

FIGURE 4. Sisyrina fashengi sp. nov., paratype, female. A. Habitus photograph, lateral view; B. Photograph of head, dorsal view; C. Photograph of genitalia, dorsal view; D. Photograph of genitalia, lateral view; E. drawing of genitalia, lateral view. S: sternum; T: tergum; cc: callus cerci; ect: ectoprocts; gst: gonostylus; gx: gonocoxite. Scale bar =1.0 mm (A, B), 0.2 mm (C–E).

FIGURE 5. Sisyrina vietnamica sp. nov., holotype, female.A. Habitus photograph, lateral view; B. Photograph of head, dorsal view; C. Photograph of genitalia, dorsal view; D. Photograph of genitalia, lateral view; E. Drawing of genitalia, lateral view. S: sternum; T: tergum; cc: callus cerci; ect: ectoprocts; gst: gonostylus; gx: gonocoxite. Scale bar = 1.0 mm (A), 0.5 mm (B), 0.1 mm (C–E)

FIGURE 8. Sisyrina qiong Yang & Gao, 2002, holotype, male. A–B. Genitalia, lateral view (left: photograph; right: drawing); C–D. Same, dorsal view (left: photograph; right: drawing); E–F. Same, caudal view (left: photograph; right: drawing). S: sternum; T: tergum; ect: ectoprocts; gst: gonostylus; gx: gonocoxite. Scale bar = 0.2 mm.