Bolshecapnia, RICKER, 1965

Broome, Hannah Jean, Stark, Bill P. & Baumann, Richard W., 2019, A Review Of The Genus Bolshecapnia Ricker, 1965 (Plecoptera: Capniidae), And Recognition Of Two New Nearctic Capniid Genera, Illiesia 15 (1), pp. 1-26 : 14-16

Key to Bolshecapnia Adults

( B. rogozera males unknown)

1 Finger-like epiproct present on the dorsoapical portion of the abdomen ( Fig. 15 ) ..…………………...………………………. Males 2

1’ Finger-like epiproct absent ……….…. Females 4

2 Epiproct tip modified as a downwardly curved hook ( Figs. 7 , 16 ); lateral hooks diverge from epiproct body near midlength ( Figs. 9 , 15 ); tergum 9 bears a thimble-shaped dorsal process ( Figs. 12 , 18 ) ...………………………….. B. milami

2’ Epiproct tip without hook ( Figs. 3 , 28 ); lateral hooks diverge from epiproct body near apex ( Figs. 2 , 28 ); tergum 9 without thimble-shaped dorsal process ( Fig. 21 ) ………………………… 3

3 Epiproct lateral hooks usually strongly bent near midlength and projecting beyond lateral margins of epiproct ( Figs. 27, 29 ); tergal notch on anterior margin of segment 10 absent ………………………………………….. B. spenceri

3’ Epiproct lateral hooks usually straight and not projecting beyond lateral margins of epiproct ( Fig. 2 ); tergal notch on anterior margin of 10 filled with projecting intersegmental membrane from tergum 9 ( Fig. 2 ) ..……………… B. gregsoni

4 Subgenital plate apex truncate ( Fig. 17 ); apex of projecting portion of plate almost as wide as its base ..………………………..…………... B. milami

4’ Subgenital plate apex rounded, or subtruncate, projecting portion of plate narrower than plate at midlength ..………………………………...…. 5

5 Projecting portion of subgenital plate with lateral margins almost parallel, or weakly convergent.…………………………… B. rogozera

5’ Lateral margins of projecting portion of subgenital plate strongly convergent ( Figs. 6 , 34 ) ..……………………………………………….. 6

6 Apical half of projecting portion of subgenital plate very narrow ( Figs. 33-34 ), sometimes asymmetrical …………………………. B. spenceri

6’ Apical half of projecting portion of subgenital plate broadly triangular and symmetrical ( Fig. 6 ) ...…………………………………….. B. gregsoni

Figures

Figs. 13-18. Bolshecapnia milami, male and female reproductive structures, localities 13-16 in Colorado, Pitkin Co., Snowmass Creek and 17-18 in Montana, Lake Co., Lion Creek. 13. Male epiproct and terminal abdominal segments dorsal. 14. Epiproct dorsal. 15. Epiproct dorsal. 16. Epiproct lateral. 17. Female subgenital plate. 18. Male tergal process dorsal.

Figs. 7-12. Bolshecapnia milami, male reproductive structures. All localities in Montana, Lake Co., Lion Creek. 7. Male epiproct dorsal. 8. Epiproct apex dorsal. 9. Epiproct and tergal process dorsal. 10. Epiproct lateral. 11. Epiproct base dorsal. 12. Epiproct apex dorsal. (af = anterolateral fold; ah = anterior hook; as = anterior section; bh = basolateral hook; bs = basal section; mg = median groove; or = orifice; sa = spongy area; tp = tergal process).

Figs. 1-6. Bolshecapnia gregsoni, male and female reproductive structures. All localities in British Columbia. 1. Garibaldi Provincial Park, male epiproct and terminal abdominal segments, dorsal. 2. Garibaldi Provincial Park, epiproct dorsal. 3. Garibaldi Provincial Park, epiproct lateral. 4. Garibaldi Provincial Park, vesicle ventral. 5. Mt. Arrowsmith, Vancouver Island, female terminal abdominal segments. 6. Mt. Arrowsmith, Vancouver Island, female subgenital plate (sgp = subgenital plate; tn = tergal notch; ve = vesicle).

Figs. 25-30. Bolshecapnia spenceri, male reproductive structures. All localities in Montana, Glacier Co., Iceberg Lake. 25. Male epiproct and terminal abdominal segments dorsal. 26. Epiproct dorsal. 27. Epiproct dorsal. 28. Epiproct apex dorsal. 29. Epiproct lateral. 30. Epiproct apex lateral.

Figs. 19-24. Bolshecapnia milami, reproductive structures, localities 19-22 in Colorado, Chaffee Co., Chalk Creek, and 23-24 in Wyoming, Albany Co., Libby Creek. 19. Male epiproct dorsal. 20. Epiproct lateral. 21. Epiproct apex lateral. 22. Male abdominal sternum 9 and vesicle (ve = vesicle). 23. Epiproct dorsal. 24. Epiproct lateral.

Figs. 31-36. Bolshecapnia spenceri (31-34) and Eurekapnia maculata (35-36) male and female reproductive structures. B. spenceri localities in British Columbia, Consolation Lake., and E. maculata localities in California, Alameda Co., Arroyo Mocho. 31. Male abdominal sternum 9 and vesicle. 32. Male vesicle. 33. Female subgenital plate. 34. Subgenital plate detail. 35. Female abdominal sterna 7-10. 36. Subgenital plate detail (sgp = subgenital plate, ve = vesicle).