Genus Cylicostephanus Ihle, 1922
Key to species
| 1 | a. Buccal capsule much deeper than broad | 2 |
| b. Buccal capsule nearly as broad or broader than deep | 3 | |
| 2 | a. Elements of ELC triangular, number 8; submedian papillae notched at point one-half distance between tips and buccal collar | C. minutus |
| b. Elements of ELC digitiform, number 12-18; submediam papillae notched near tips | C. calicatus | |
| 3 | a. Walls of buccal capsule markedly thicker anteriorly than posteriorly; elements of ELC about as broad as long; dorsal gutter extends almost to base of ILC | 4 |
| b. Walls of buccal capsule of nearly uniform thickness; elements of ELC more than twice as long as broad; dorsal gutter extends slightly more than halfway or less toward base of ILC | 5 | |
| 4 | a. Buccal capsule markedly asymmetrical in lateral view; walls of capsule concave; teeth in esophageal funnel not prominent. Submedian papillae tips pointed | C. asymetricus |
| b. Buccal capsule nearly symmetrical; walls of capsule straight; prominent teeth in esophageal funnel. Submedian papillae tips bulbous | C. bidentatus | |
| 5 | a. In dorsal view, walls of buccal capsule straight, slightly thicker posteriorly; dorsal gutter slightly more than 1/2 as long as depth of buccal capsule | C. hybridus |
| b. In dorsal view, walls of buccal capsule with slight compound curve slightly thicker anteriorly; dorsal gutter button-like | 6 | |
| 6 | a. Elements of ELC and ILC in 1:1 ratio; dorsal ray of male bursa extremely long; female tail straight; teeth in esophageal funnel not prominent | C. longi-bursatus |
| b. Elements of ILC almost twice as numerous as elements of ELC; dorsal ray of male bursa not unusually long; female tail bent dorsally with a ventral prominence; prominent teeth in esophageal funnel | C. goldi |
© (contents) R.J.
Lichtenfels, V.A. Kharchenko,
G.M. Dvojnos 2003
Design and programming: Yuriy Kuzmin,
2003