Sweltsa tamalpa

Stark, Bill P. & Baumann, Richard W., 2007, Sweltsa Yurok (Plecoptera: Chloroperlidae), A New Stonefly From California, U. S. A., Illiesia 3 (10), pp. 95-101 : 101

Key to Males of the Sweltsa tamalpa Species Group

1 Epiproct lateral margins almost parallel in dorsal aspect for most of length ( Fig. 2 ); apical half to third of epiproct not forming a conspicuous foot shaped process in lateral aspect ( Fig. 3 ) …. pisteri

1’ Epiproct lateral margins conspicuously constricted in dorsal aspect near midlength ( Fig. 8 ); apical half to third of epiproct forming a more-orless foot shaped process in lateral aspect ( Fig. 9 ) ………………………………………………….….. 2

2 Base of epiproct bare in dorsal aspect ( Fig. 10 ), setose band terminates forward of lateral shoulders; dorsal margin of epiproct tip almost straight in lateral aspect ( Fig. 9 ), foot shaped process poorly define ……………...…….. tamalpa

2’ Dorsal aspect of epiproct with setose band extending between basolateral shoulders to posterior margin ( Fig.20 ); tip of epiproct angled dorsad from “ankle” ( Fig. 19 ), apex distinctly foot shaped ………………………………...……… yurok

Figures

Figs. 1-6. Sweltsa pisteri (1-5: Irish Gulch Creek, Mendocino Co., CA; 6: Caspar Creek, Mendocino Co., CA). 1. Male terminalia, dorsal aspect, 2. Epiproct, dorsal aspect, 3. Epiproct, lateral aspect, 4. Epiproct apex, lateral aspect, 5. Epiproct base, dorsal aspect, 6. Egg.

Figs. 7-12. Sweltsa tamalpa (Woodacre, Marin Co., CA). 7. Male terminalia, dorsal aspect, 8. Epiproct, dorsal aspect, 9. Epiproct, lateral aspect, 10. Epiproct base, dorsal aspect, 11. Female abdominal sterna 8-9, 12. Egg.

Figs. 17-22. Sweltsa yurok (17, 22: tributary Willow Creek, 2.4 miles E Berry Summit, Humboldt Co., CA; 18-20: Mile 4.1, Rd 13N01, Humboldt Co., CA; 21: Slide Creek, Humboldt Co., CA). 17. Dorsal aspect male epiproct, 18. Lateral aspect epiproct, 19. Epiproct apex, lateral aspect, 20. Epiproct base, dorsal aspect, 21. Female terminalia, ventral, 22. Egg.