Orchesia

Alekseev, Vitalii I. & Bukejs, Andris, 2015, A new species of the genus Orchesia Latreille (Coleoptera: Melandryidae) from Baltic amber with a key to species described from fossil resins, Zootaxa 3947 (4), pp. 590-596 : 595

A key to species of Orchesia described from fossil resins

1. Elytra with longitudinal furrows; metatibial spurs as long as metatarsomere 1; smaller, body length 2.7 mm. Baltic amber (Kaliningrad Region, Russia)......................................................... O. canaliculata sp. nov.

- Elytra without longitudinal furrows, metatibial spurs slightly shorter than metatarsomere 1; lager, body length larger than 3.0 mm................................................................................................. 2

2. Elytra with transverse rugosity in basal 1/10; antennomere 11 is more than twice as long as antennomere 10; Body length 3.6– 4.1 mm. Rovno amber ( Ukraine), Baltic amber (Kaliningrad Region, Russia)..................... O. rasnitzyni Nikitsky

- Elytra without transverse rugosity; antennomere 11 is 1.7 times longer than antennomere 10; body length 3.25–3.6 mm. Baltic amber (Kaliningrad Region, Russia)............................................... O. turkini Alekseev & Bukejs