Cephalocyclus

Deloya, Cuauhtémoc & Ibáñez-Bernal, Sergio, 2000, New Species Of Aphodiinae From Mexico And A Key To Species Of Cephalocyclus Dellacasa, Gordon And Dellacasa (Coleoptera: Scarabaeidae), The Coleopterists Bulletin 54 (3), pp. 318-324 : 322-323

Key to species of the genus Cephalocyclus

1. Body subdepressed ------------------------------------------------------------------------------------------------- 2

1′. Body convex ------------------------------------------------------------------------------------------------------------- 3

2. Clypeal margin and lateral margins of pronotum with long setae. Apical inferior spur of mesotibia spatulate, externally curved ------------------------------- ------------------------------------------------------------------------------------------------- C. villosipes (Harold)

2′. Clypeal margin and lateral margins of pronotum without long setae. Apical inferior spur of mesotibia long and thin --------------------------------------------- ------------------------------------------ stebnickae Deloya & Ibáñez­Bernal , new species

3. Elytra dull with pubescence. Anterior margin of clypeus subsinuate. Mesotarsus shorter than mesotibia. Body length: 5–7 mm ------------------------------ ---------------------------------------------------------------------------------------------- C. fuliginosus (Harold)

3′. Elytra shiny. Anterior margin of clypeus subtruncate or nearly truncate. Mesotarsus as long or longer than mesotibia ----------------------------------------------- 4

4. Pronotum with median longitudinal impression ------------------------------------------ 5

4′. Pronotum without median longitudinal impression ------------------------------------ 6

5. Males with first mesotarsomere projected ventro­apically and bearing a fringe of setae. Elytral epipleura with setae in the basal two­thirds; frontal suture not tuberculate. Body length 5–6 mm ------------------------------------------- ----------------------------------------------------------------------------------------------- C. mexicanus (Harold)

5′. Males with first mesotarsomere not expanded apically and without fringe of setae. Elytral epipleura with setae in the basal three­forth. Frontal suture weak, with three slightly humps. Body length 6–8 mm ---------------- -------------------------------------------------------------------------------------------------- C. gravidus (Harold)

6. Anterior margin of clypeus nearly truncate. Dorsal surface moderately shiny. Legs testaceous reddish. Clypeus slightly swollen at center. Body length 7–8 mm -------------------------------------------------------------- C. ludiventris (Harold)

6′. Anterior margin of clypeus subtruncate. Dorsal surface very shiny. Legs piceous. Clypeus nearly flat. Body length 5–6 mm ------------------------------------- ---------------------------------------------------------------------------------------------- C. puncticeps (Harold)