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https://doi.org/10.5194/fr-23-105-2020
© Author(s) 2020. This work is distributed under
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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.
the Creative Commons Attribution 4.0 License.
Research article
| 
11 Jun 2020
Research article |
| 11 Jun 2020
| 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
Institute of Life Sciences and Technologies, Daugavpils University,
Vienības 13, Daugavpils, 5401, Latvia
Jan Bezděk
Department of Zoology, Mendel University, Zemědělská 1, 613 00 Brno, Czech Republic
Vitalii I. Alekseev
Shirshov Institute of Oceanology, Russian Academy of Sciences,
Nahimovskiy prospekt 36, Moscow 117997, Russia
Kaliningrad Regional Amber Museum, Marshal Vasilevskii square 1,
Kaliningrad 236016, Russia
Kristaps Kairišs
Institute of Life Sciences and Technologies, Daugavpils University,
Vienības 13, Daugavpils, 5401, Latvia
Ryan C. McKellar
Royal Saskatchewan Museum, 2445 Albert St., Regina, SK, S4P 4W7,
Canada
Biology Department, University of Regina, Regina, SK, S4S 0A2,
Canada
Department of Ecology & Evolutionary Biology, University of
Kansas, Lawrence, Kansas 66045, USA
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Vitalii I. Alekseev and Andris Bukejs
Foss. Rec., 24, 223–231, https://doi.org/10.5194/fr-24-223-2021, https://doi.org/10.5194/fr-24-223-2021, 2021
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A new micro-histerid species is described and illustrated from Eocene Baltic amber. As the first extinct member of the subfamily Abraeinae (Histeridae) and the smallest known fossil histerid specimen, this material was examined using a combination of light microscopy and X-ray micro-computed tomography (μCT). Internal features of the abdomen are well preserved, allowing us to study sclerotized parts of the aedeagus and illustrate these structures in detail.
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Dascillidae are a species-poor beetle group with a scarce fossil record. Here, we used light microscopy and X-ray microtomography to describe Baltodascillus serraticornis gen. et sp. nov. based on a well-preserved specimen from Eocene Baltic amber. We tentatively place this species in the subfamily Karumiinae. This is the first representative of the Dascillidae formally described from Baltic amber and the first described fossil member of the subfamily Karumiinae.
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Baltocar sontagae sp. nov. and Pseudomesauletes lobanovi sp. nov. from the family Rhynchitidae are described from Eocene Baltic amber. It is the first record of Pseudomesauletes from Baltic amber. Keys to species of the genus Baltocar and to the Eocene species of the genus Pseudomesauletes are given. Assumed trophic relationships of the genus Baltocar with Cupressaceae and Pseudomesauletes lobanovi sp. nov. with Rosaceae are discussed.
Vitalii I. Alekseev and Andris Bukejs
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A new micro-histerid species is described and illustrated from Eocene Baltic amber. As the first extinct member of the subfamily Abraeinae (Histeridae) and the smallest known fossil histerid specimen, this material was examined using a combination of light microscopy and X-ray micro-computed tomography (μCT). Internal features of the abdomen are well preserved, allowing us to study sclerotized parts of the aedeagus and illustrate these structures in detail.
Robin Kundrata, Matthew L. Gimmel, Gabriela Packova, Andris Bukejs, and Stephan M. Blank
Foss. Rec., 24, 141–149, https://doi.org/10.5194/fr-24-141-2021, https://doi.org/10.5194/fr-24-141-2021, 2021
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Dascillidae are a species-poor beetle group with a scarce fossil record. Here, we used light microscopy and X-ray microtomography to describe Baltodascillus serraticornis gen. et sp. nov. based on a well-preserved specimen from Eocene Baltic amber. We tentatively place this species in the subfamily Karumiinae. This is the first representative of the Dascillidae formally described from Baltic amber and the first described fossil member of the subfamily Karumiinae.
Andris Bukejs and Andrei A. Legalov
Foss. Rec., 24, 117–127, https://doi.org/10.5194/fr-24-117-2021, https://doi.org/10.5194/fr-24-117-2021, 2021
Short summary
Short summary
Baltocar sontagae sp. nov. and Pseudomesauletes lobanovi sp. nov. from the family Rhynchitidae are described from Eocene Baltic amber. It is the first record of Pseudomesauletes from Baltic amber. Keys to species of the genus Baltocar and to the Eocene species of the genus Pseudomesauletes are given. Assumed trophic relationships of the genus Baltocar with Cupressaceae and Pseudomesauletes lobanovi sp. nov. with Rosaceae are discussed.
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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.
A male of the extinct leaf-beetle species Calomicrus eocenicus embedded in Baltic amber is found...
