Eurrhacini, Bocakova, 2005

Nascimento, Elynton Alves Do & Bocakova, Milada, 2023, A new genus of Eurrhacini from the Brazilian Atlantic Forest (Coleoptera: Lycidae: Lycinae) with an updated key to genera, Zootaxa 5383 (2), pp. 242-250 : 249

Key to genera of Eurrhacini with flabellate antennae in males (adapted from Bocakova (2003), with the inclusion of new genera and a revised concept of Emplectus )

1. Terminal maxillary palpomere longer than the second palpomere; parameres absent to reduced, integrated into the base of phallus......................................................................................... Eurrhacus

– Palpomere 2 as long as 4 or longer than palpomere 4......................................................... 2

2. Palpomere 2 longer than 4, male genitalia with parameres either absent, or integrated to the phallus.................... 3

- Male genitalia with parameres free, not integrated in the base of phallus......................................... 4

3. Male genitalia lacking parameres, dorsal margin of phallobase with lateroapical projections.................... Currhaeus

- Phallus, parameres, and phallobase integrated, subapical portion of phallus presenting a pair of sclerites........ Emplectus

4. Phallus ventroapically curved, parameres shortened, ventrobasally fused, phallobase as long as 2/3 of phallus... Calocladon

- Phallus slightly curved to almost straight, parameres elongated................................................. 5

5. Phallus with a series of folding structures, parameres flattened, slightly tortuous ribbon-shaped with hook-like and/or pointed projections, L–shaped in lateral view............................................................ Cladocalon

- Phallus curved medially in lateral view, apex slightly ventrally oriented, parameres with ventral subapical thorns........................................................................................... Atlanticolycus gen. nov.