Idagona

Shear, William A., 2007, Cave millipeds of the United States. V. The genus Idagona Buckett & Gardner (Chordeumatida, Conotylidae, Idagoninae), Zootaxa 1463, pp. 1-12 : 3

Key to species of Idagona , based on males

1a. Legs 4 with femora swollen and bearing a median pore ( Fig. 13 ); gonopod with complex, fimbriate subterminal branch ( Figs. 4 , 21, 22 ); SE Nevada................................................................. lehmanensis n. sp.

1b. Legs 4 with femora not swollen, not bearing a median pore, subterminal branch of gonopod lacking......2.

2a. Anterior gonopod with few teeth along apicolateral surface ( Figs. 3 , 7); adenostyles of legs 3 with distinct basal constriction ( Fig. 11 ); N Utah......................................................................................... jasperi n. sp.

2b. Anterior gonopod with many strong teeth along apicolateral surface, teeth arranged in irregular, overlapping rows ( Figs. 1, 2 , 5, 6); adenostyles of legs 3 lacking basal constriction ( Figs. 9, 10 ); S Idaho ............. ......................................................................................................................... westcotti Buckett & Gardner.

Figures

FIGURES 9 – 14. Pregonopodal leg modifications of Idagona species. 9 – 12, third legs, anterior views. 9. Idagona westcotti, Giant Arch Cave. 10.. I. westcotti, Ice Capades Cave. 11. I. jasperi n. sp. 12. I. lehmanensis n. sp. 13. Leg 4 of I. lehmanensis n. sp., anterior view. 14. Denticles near adenostyle of leg 3 femur of I. lehmanensis n. sp.

FIGURES 1 – 4. Gonopods of Idagona species. 1, Idagona westcotti, Giant Arch Cave, posteriorventral view. 2. I. westcotti, Ice Capades Cave, posterioventral view. 3. I. jasperi, n. sp. posterioventral view. 4. I. lehmanenesis, n. sp., posterior view.

FIGURES 21, 22. Idagona lehmanensis n. sp. 21. Tip of anterior gonopod, ventral view. 22. Tip of anterior gonopod, lateral view.