Description of the male of fossil <i>Calomicrus eocenicus</i> Bukejs et Bezděk (Coleoptera: Chrysomelidae: Galerucinae) from Eocene Baltic amber using X-ray microtomography

Bukejs, Andris; Bezděk, Jan; Alekseev, Vitalii I.; Kairišs, Kristaps; McKellar, Ryan C.

doi:https://doi.org/10.5194/fr-23-105-2020

Articles | Volume 23, issue 1

https://doi.org/10.5194/fr-23-105-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/fr-23-105-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 1

Research article

|

11 Jun 2020

Research article |

| 11 Jun 2020

Description of the male of fossil Calomicrus eocenicus Bukejs et Bezděk (Coleoptera: Chrysomelidae: Galerucinae) from Eocene Baltic amber using X-ray microtomography

Andris Bukejs, Jan Bezděk, Vitalii I. Alekseev, Kristaps Kairišs, and Ryan C. McKellar

Video supplement

Calomicrus eocenicus Bukejs et Bezděk: P3300.139 [RSM], male, volume rendering of the habitus. Andris Bukejs and Kristaps Kairišs https://doi.org/10.5446/45963

Calomicrus eocenicus Bukejs et Bezděk: P3300.139 [RSM], male, volume rendering of the pterothorax without legs. Andris Bukejs and Kristaps Kairišs https://doi.org/10.5446/45964

Calomicrus eocenicus Bukejs et Bezděk: P3300.139 [RSM], volume rendering of the aedeagus. Andris Bukejs and Kristaps Kairišs https://doi.org/10.5446/45965

Short summary

A male of the extinct leaf-beetle species Calomicrus eocenicus embedded in Baltic amber is found and compared with an earlier known female. The beetle genitalia are illustrated in detail using X-ray microtomography. The male is smaller than female and has a modified last abdominal segment. The extinct species (about 40 million years old) possesses typical sexual characters which are similar to the characters of extant beetles within the group.