Sphaeronemoura, Shimizu & Sivec, 2001

Zhu, Ya-Fei & Du, Yu-Zhou, 2024, A new species of Sphaeronemoura (Plecoptera: Nemouridae) from Guizhou, China with a revised key to males of this genus, Zootaxa 5529 (2), pp. 373-380 : 379

Key to Sphaeronemoura males (modified from Sivec & Stark 2010)

1. Tergum 10 unmodified................................................................................. 2

- Tergum 10 with a projection on either side near epiproct...................................................... 3

2. Epiproct flagellum in dorsal aspect shaped like a question mark; outer lobe of paraproct apically swollen; cerci without apical or subapical spine......................................................................... S. paraproctalis

- Epiproct flagellum in dorsal aspect long, slender and hooked at tip; outer lobe of paraproct narrowed at tip; cerci with apical and subapical spines......................................................................... S. spinacercia

3. Tergum 8 unmodified.................................................................................. 4

- Tergum 8 modified, protruding posteriorly................................................................ 11

4. Cercus unmodified.................................................................................... 5

- Cercus large and elongate, with a medial finger-like projection...................................... S. grandicauda

5. Epiproct flagellum apex curved.......................................................................... 6

- Epiproct flagellum apex straight.................................................................. S. elephas

6. Apex of flagellum acute................................................................................ 7

- Apex of flagellum blunt................................................................................ 9

7. Inner paraproct lobe longer than median lobe............................................................... 8

- Inner paraproct lobe shorter than median lobe, outer lobes thumb shaped................................. S. malickyi

8. Inner paraproct lobe finger-like, apex blunt............................................................ S. siveci

- Inner paraproct lobe slender and triangular, apex acute................................................. S. hainana

9. Outer paraproct lobe slightly wider than inner lobe.................................................. S. hamistyla

- Outer paraproct lobe not wider than inner lobe............................................................. 10

10. Outer paraproct lobe thumb shaped,............................................................... S. shimizui

- Outer paraproct lobe slender, apex of flagellum foot shaped............................................... S. poda

11. Legs brown with wide yellow femoral band............................................................... 12

- Legs uniformly brown................................................................................ 13

12. Inner paraproct lobe apex bifurcate and pointed.................................................. S. kunmingensis

- Inner paraproct lobe simple, without apex bifurcate................................................ S. inthanonica

13. Tergum 8 process bilobed.............................................................................. 14

- Tergum 8 process entire............................................................................... 17

14. Tergum 8 process asymmetrical................................................................ S. asymmetria

- Tergum 8 process symmetrical.......................................................................... 15

15. Cercus with four knobs at apex................................................................. S. tetragona

- Cercus without four knobs at apex....................................................................... 16

16. Epiproct flagellum with an acute apex............................................................. S. separata

- Epiproct flagellum without an acute tip; cercus truncate................................................ S. plutonis

17. Tergum 8 process barely projecting beyond posterior margin of tergum 8................................ S. formosana

- Tergum 8 process projecting well beyond posterior margin of tergum 8.......................................... 18

18. Tergum 8 process recurved and bow-shaped or subquadrate................................................... 19

- Tergum 8 process nearly trapezoidal..................................................................... 20

19. Tergum 8 process recurved and bow-shaped; cercus bilobed, swollen like crab claws.............. S. fanjingshana sp. nov.

- Tergum 8 process subquadrate.................................................................. S. songshana

20. Flagellum with multiple distinct curves......................................................... S. multicurvata

- Flagellum without multiple distinct curves................................................................ 21

21. Median paraproct lobe bilobed.................................................................. S. acutispina

- Median paraproct lobe entire; cercus apex slightly trifurcate.......................................... S. campylura