Calochromus Guerin-Meneville, 1833: 158

Calochromus Guerin-Meneville, 1833: 158 View in CoL .

Type species: Calochromus glaucopterus Guerin-Meneville, 1833 (by monotypy).

Differential diagnosis: Calochromus differs from other genera in the widely rounded obtuse lateral edge of the pronotum, relatively long parameres ( Fig. 5L View Figure 5 ) and the lateral process of the phallobase widely rounded ( Fig. 5L View Figure 5 ), unlike in Lygistopterus where it is pointed. Calochromus has a compact cranium, unlike Lucaina and Macrolygistopterus , each of which has a long rostrum, or some Lygistopterus and Micronychus with a short rostrum. Micronychus and Parantis gen. nov., previously placed in Calochromus , have a sclerotized internal sac ( Fig. 5I, J View Figure 5 ). We define three lineages in Calochromus with subgeneric rank: Flabellochromus Pic, 1925 ; Calochromus s.s. and Paracalochromus subgen. nov. ( Fig. 5B – D, L – M View Figure 5 ).