Erotinae, LeConte, 1881

Kazantsev, Sergey V. & Bocak, Ladislav, 2022, New genus of erotine net-winged beetles, Damzenium gen. nov. (Coleoptera: Lycidae), from Eocene Rovno amber, Zootaxa 5154 (5), pp. 583-589 : 586

Key to amber genera of the subfamily Erotinae

The five currently known Erotinae amber genera may be distinguished by the following key.

1. Pronotum with rhomboidal median areole (as in Figs 2G–J )...................................... ( Dictyopterini ) 2

- Pronotum with cross-like structure of pronotal carinae ( Figs 1E, F, K )................................... ( Erotini ) 3

2. External elytral interstice with three rows of cells (Baltic amber)...................................... Kolibaceum

- External elytral interstice (lateriad of humeral costa) with two rows of cells (Baltic and Rovno amber)....... Helcophorus

3. Elytral costa 3 robust in entire length; last elytral interstice wide, with irregular rows of cells ( Figs 1A–F ) (Rovno amber)..................................................................................... Damzenium gen. nov.

- Elytral costa 3 weak, costa 4 robust in proximal half; last elytral interstice (lateriad of humeral costa) with one or two rows of cells (as in Fig. 2K )................................................................................... 4

4. Median pronotal crest incomplete, obsolete in posterior half; lateral pronotal carinae do not reach median ridge (Baltic amber)..................................................................................... Pseudaplatopterus

- Median pronotal crest complete; lateral pronotal carinae reach the median crest, supplied with short anterolateral carinae ( Fig. 2K ) (Baltic amber)......................................................................... Protolopheros

Figures

FIGURE 1. Damzenium rivnense gen. et sp. nov. A—general appearance, dorsal view, B, C—pronotum and humeral part of the elytra, D, E—posterior and humeral part of the right elytron; F—general appearance, lateral view. Scales 0.5 mm.

FIGURE 2. A—J. Morphology of the extant Erotinae. A—Eropterus sp., Japan, general appearance, dorsal view; B–D— elytron, humeral part. B—Eropterus sp., Japan; C—Benibotarus spinicoxis (Kiesenwetter), Japan; D—Lopheros sp., Japan. E— G—Pronotum. E—Eropterus trilineatus (Melsheimer), USA, dorsal view; F—Lopheros sp., Japan; G—Benibotarus spinicoxis (Kiesenwetter), Japan. H– J General appearance, dorsal view. H—Helcophorus miniatus Fairmaire, Himalayas; I—Greenarus belokobylskyi Kazantsev, Vietnam; J—Laterialis sanguinea Kazantsev, China. Eocene Erotini. K—Protolopheros hoffeinsorum Kazantsev, Baltic amber (photo from Kazantsev, 2013). Scales 0.5 mm.