Perlomyia, Banks, 1906

Sivec, Ignac & Stark, Bill P., 2012, Seven New Species Of Perlomyia (Plecoptera: Leuctridae) From Japan, Illiesia 8 (7), pp. 94-103 : 102

Key to Japanese Male Perlomyia

( P. gifuensis not included)

1 Abdominal terga 8 or 9 with a median lobe ( Figs. 1 , 19 ) ………………………………………………. 2

1’ Abdominal terga 8 or 9 without median lobe ( Fig. 4 ) ……………………………………………. 3

2 Abdominal tergum 8 with a median lobe ( Fig. 1 ); paraprocts gradually narrowed in lateral aspect from midlength to apex ( Fig. 3 ); cerci with a small terminal spine ( Fig. 3 ) ……………………. P. ainu

2’ Abdominal tergum 9 with a median lobe ( Fig. 19 ); paraprocts apically truncate in lateral aspect ( Fig. 21 ); cerci without terminal spine ( Fig. 21 ) ……………………………………………... P. kersti

3 Tergum 10 bearing a pair of small knobs ( Figs. 4 , 12 , 16 ) ………………………..…………………… 4

3’ Tergum 10 without small knobs ( Figs. 8 , 24 ) ……………………………………………………... 7

4 Cerci bearing a long, slender, terminal spine, prominent in dorsal and lateral aspect ( Figs. 16, 18 ) …………………………………………... P. kappa

4’ Cerci without terminal spine, or with, at most a minute projection, apices appearing truncate, rounded or notched in dorsal aspect ( Figs. 4 , 12 ) ……………………………………………………… 5

5 Apex of epiproct bent forward abruptly as a small triangular tab ( Fig. 6 ); cerci apically truncate ( Fig. 4 ) ………………………………………… P. honshu

5’ Apex of epiproct gradually narrowed to an acute or rounded tip ( Fig. 14 ); cerci apically rounded or notched ( Fig. 12 ) ..……………………………….. 6

6 Cercal apices rounded in dorsal aspect ( Fig. 12 ), without terminal notch or minute spine; intersegmental membrane between terga 9-10 without median hairy patch ( Fig. 12 ) …... P. iwate

6’ Cercal apices with a shallow posterolateral notch and small spine; intersegmental membrane between terga 9-10 with a median hairy patch ………….…..……………………………… P. parva

7 Epiproct apex truncate in lateral aspect ( Fig. 10 ); cerci with a small terminal spine ( Figs. 8, 10 ) ……………………………………………… P. isobeae

7’ Epiproct sinuate in lateral aspect, tip not truncate ( Fig. 26 ); cerci without terminal spine ( Figs. 24-26 ) ……………………………………………... P. sinuata

Figures

Figs. 1-3. Perlomyia ainu terminalia. 1. Male dorsal. 2. Male ventral. 3. Male lateral.

Figs. 19-23. Perlomyia kersti terminalia. 19. Male dorsal. 20. Male ventral. 21. Male lateral. 22. Female lateral. 23. Female ventral.

Figs. 4-7. Perlomyia honshu terminalia. 4. Male dorsal. 5. Male ventral. 6. Male lateral, epiproct tip inset. 7. Female ventral.

Figs. 12-15. Perlomyia iwate terminalia. 12. Male dorsal. 13. Male ventral. 14. Male lateral. 15. Female ventral.

Figs. 16-18. Perlomyia kappa terminalia. 16. Male dorsal. 17. Male ventral. 18. Male lateral.

Figs. 8-11. Perlomyia isobeae terminalia. 8. Male dorsal. 9. Male ventral. 10. Male lateral. 11. Female ventral.

Figs. 24-27. Perlomyia sinuata terminalia. 24. Male dorsal. 25. Male ventral. 26. Male lateral. 27. Female ventral.