Cyrtonion, Hansen, 1989

Fikáček, Martin, 2008, A new species of the genus Cyrtonion (Coleoptera: Hydrophilidae: Megasternini) from the Democratic Republic of the Congo, Acta Entomologica Musei Nationalis Pragae (suppl.) 48 (1), pp. 27-35 : 32

Key to Cyrtonion species

1a. Median lobe of the aedeagus rounded apically. Aedeagus and median lobe rather wide ( Fig. 1 ). .............................................................................................. C. moto sp. nov.

1b. Median lobe of the aedeagus pointed apically.Aedeagus and median lobe narrower (see FIKÁČEK 2006, Fig. 17). ............................................................................................... 2

2a. Lateral margins of the apical part of the median lobe straight, apex more sharply pointed ( Fig. 3 ). ............................................................................... C. ghanense Hansen, 1989

2b. Lateral margins of the apical part concave, apex more obtuse ( Fig. 4 ). ........................ ................................................................................. C. sculpticolle ( Régimbart, 1907)

Figures

Figs. 1-4. Aedeagophores of Cyrtonion Hansen, 1989 species. 1-2 – C. moto sp. nov., holotype; 3 – C. ghanense Hansen, 1989, paratype; 4 – C. sculpticolle (Régimbart, 1907), paratype. 1 – aedeagus; 2-4 – apical portion of the median lobe.