The first extinct species of &amp;lt;i&amp;gt;Acritus&amp;lt;/i&amp;gt; LeConte, 1853 (Histeridae: Abraeinae) from Eocene Baltic amber: a microscopic beetle inclusion studied with X-ray micro-computed tomography

Alekseev, Vitalii I.; Bukejs, Andris

doi:10.5194/fr-24-223-2021

Cited by 7 publications

(2 citation statements)

References 24 publications

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“…In cases where the fossils are not as easily observable through a light microscope, micro-CT scans are of great importance to study fossil specimens (Dierick et al, 2007 ). This applies even more for different groups of organisms in which diagnostic characteristics are often hidden, for examples in beetles, for which internal structures are needed for identification (Alekseev & Bukejs, 2021 ; Kundrata et al, 2020 ). Furthermore, the usefulness of micro-CT scanning is not only restricted to amber fossils.…”

Section: Discussionmentioning

confidence: 99%

Impact of increasing morphological information by micro-CT scanning on the phylogenetic placement of Darwin wasps (Hymenoptera, Ichneumonidae) in amber

Viertler,

Urfer,

Schulz

et al. 2023

Swiss J Palaeontol

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The correct interpretation of fossils and their reliable taxonomic placements are fundamental for understanding the evolutionary history of biodiversity. Amber inclusions often preserve more morphological information than compression fossils, but are often partially hidden or distorted, which can impede taxonomic identification. Here, we studied four new fossil species of Darwin wasps from Baltic and Dominican amber, using micro computed tomography (micro-CT) scans and 3D reconstructions to accurately interpret and increase the availability of morphological information. We then infer their taxonomic placement in a Bayesian phylogenetic analysis by combining morphological and molecular data of extant and fossil Darwin wasps and evaluate the impact and usefulness of the additional information from micro-CT scanning. The results show that although we gained significant morphological information from micro-CT scanning, especially concerning measurements and hidden dorsal and ventral structures, this did not impact subfamily-level placement for any of the four fossils. However, micro-CT scanning improved the precision of fossil placements at the genus level, which might be key in future dating and diversification analyses. Finally, we describe the four new fossil species as Rhyssa gulliveri sp. nov. in Rhyssinae, Triclistus levii sp. nov. in Metopiinae, Firkantus freddykruegeri gen. et. sp. nov. in Pimplinae and Magnocula sarcophaga gen. et sp. nov. in Phygadeuontinae. The first two species are the first known representatives of the subfamilies Rhyssinae and Metopiinae in amber.

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Section: Discussionmentioning

confidence: 99%

Impact of increasing morphological information by micro-CT scanning on the phylogenetic placement of Darwin wasps (Hymenoptera, Ichneumonidae) in amber

Viertler,

Urfer,

Schulz

et al. 2023

Swiss J Palaeontol

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“…These techniques were recently successfully applied in a number of paleontological studies dealing with various animal taxa, including both vertebrates [11,12] and invertebrates [13][14][15]. Regarding Coleoptera (beetles), the micro-CT was used in some studies focused on the Burmese amber [10,16], but it is especially successful in reconstructing the morphology of specimens from Baltic amber (including genitalia and fine morphology of specimens with body length under 1 mm) [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

The First Ptilodactyla Illiger, 1807 (Coleoptera: Dryopoidea: Ptilodactylidae) Described from Eocene Baltic Amber

Kundrata

Packova

Kairišs

et al. 2021

Biology

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The beetle family Ptilodactylidae contains more than 500 extant species; however, its fossil record is scarce and remains understudied. In this study, we describe a new species of Ptilodactylidae, Ptilodactyla eocenica Kundrata, Bukejs and Blank, sp. nov., based on a relatively well-preserved specimen from Baltic amber. We use X-ray microcomputed tomography to reconstruct its morphology since some of the principal diagnostic characters have been obscured by opaque bubbles. It is the third ptilodactylid species described from Baltic amber, and the first one belonging to the subfamily Ptilodactylinae. Additionally, we summarize the classification, diversity, and distribution of both extinct and extant Ptilodactylidae.

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X-ray micro-computed tomography of minute hooded beetles (Coleoptera: Corylophidae) reveals its hidden paleodiversity in the Eocene Baltic amber

2024

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The first extinct species of <i>Acritus</i> LeConte, 1853 (Histeridae: Abraeinae) from Eocene Baltic amber: a microscopic beetle inclusion studied with X-ray micro-computed tomography

Cited by 7 publications

References 24 publications

Impact of increasing morphological information by micro-CT scanning on the phylogenetic placement of Darwin wasps (Hymenoptera, Ichneumonidae) in amber

Impact of increasing morphological information by micro-CT scanning on the phylogenetic placement of Darwin wasps (Hymenoptera, Ichneumonidae) in amber

The First Ptilodactyla Illiger, 1807 (Coleoptera: Dryopoidea: Ptilodactylidae) Described from Eocene Baltic Amber

X-ray micro-computed tomography of minute hooded beetles (Coleoptera: Corylophidae) reveals its hidden paleodiversity in the Eocene Baltic amber

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