Kathroperla

Stark, Bill P., Kondratieff, Boris C. & Verdone, Chris J., 2015, Kathroperla Siskiyou, A New Stonefly Species From California And Oregon, U. S. A. (Plecoptera: Chloroperlidae), Illiesia 11 (8), pp. 92-103 : 101

Preliminary Key to Nearctic Kathroperla Species

1 Lateral pronotal margin of adults usually entirely yellow; female subgenital plate usually reaching posterior margin of sternum 9 ( Fig. 4 in Stark & Surdick 1987); egg collar absent and chorionic striations absent ( Figs. 20-25 ); dorsal margin of epiproct usually bicolored with a black anterior band adjacent to a dark brown band ( Fig. 1 in Stark & Surdick 1987); basal male cercal segments about 3 times long as wide ………………………………………….. K. takhoma

1’ Lateral pronotal margins of adults with black pigment extending at least a third of the margin length, but often completely dark ( Fig. 15 ); egg collar present, chorionic striations present although sometimes indistinct ( Figs. 1-6 , 9-14 ); dorsal margin of epiproct narrow and black; basal male cercal segments about 2-2.5 times long as wide ………………………………...…… 2

2 Dorsolateral margin of male epiproct slanted conspicuously caudad ( Fig. 16 ); egg chorion covered with fine bead-like tubercles poorly organized into striations ( Figs. 9-14 ) ………………………….………………. K. siskiyou

2’ Dorsal margin of male epiproct almost straight; egg chorion covered with thick tubercles organized into well-developed longitudinal striations ( Figs. 1-6 ) …………....….…... K. perdita

Figures

Figs. 1-6. Kathroperla perdita eggs. 1-4. Ross Creek, Lincoln Co., Montana. 5-6. Grande Ronde River, Union Co., Oregon. 1. Egg, lateral. 2. Chorionic detail (lt = linear tubercle; m = micropyle). 3. Collar end of egg (a = anchor). 4. Anterior pole (lid) of egg. 5. Collar end of egg (s = stria). 6. Anterior pole of egg.

Figs. 20-25. Kathroperla takhoma eggs, Bridal Veil Creek, Multnomah Co., Oregon. 20. Entire egg, lateral aspect. 21. Collar end chorionic detail. 22. Anterior pole. 23. Collar, apical aspect. 24. Chorionic detail adjacent to collar. 25. Chorionic detail (micropyle at arrow).

Figs. 15-19. Kathroperla siskiyou adult features. 15. Head and pronotum. 16. Male terminalia, dorsal. 17. Male sternum 9 with vesicle. 18. Male aedeagus, lateral (da = dorsoapical lobe; ls = lateral sclerite). 19. Female terminalia, ventral.

Figs. 9-14. Kathroperla siskiyou eggs, Split Rock Creek, Jackson Co., Oregon. 9. Entire egg, lateral aspect. 10. Entire egg with intact anchor. 11. Collar end chorionic detail. 12. Collar, apical aspect. 13. Anterior pole. 14. Chorionic detail (micropyle at arrow).