Abstract
Fossilization in amber is unique in preserving specimens with microscopic fidelity; however, arthropod inclusions are rarely examined beyond the exoskeleton as this requires destructive sampling when traditional techniques are used. We report the first complete, digital 3D, non-destructive reconstruction of the anatomy of an insect fossil, a specimen of †Mengea tertiaria embedded in a 42-Ma Baltic amber. This was made possible using Synchrotron μ-CT. The species belongs to the stem group of the phylogenetically enigmatic and extremely specialized Strepsiptera. Most internal structures of the fossil are preserved, but small parts of the lumen had decayed due to incomplete infiltration of the resin. Data on internal organs provided additional information for resolving phylogenetic relationships. A sister group relationship between †Mengea and all extant lineages of the group was confirmed with characters previously not accessible. The newly gained information also yielded some insights in the biology of †Mengea and the early evolutionary history of Strepsiptera. The technique has a tremendous potential for a more accurate interpretation of diverse fossil arthropods preserved in ambers from 130 Ma to the present.
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Acknowledgements
We are very grateful to Prof. Dr. Ragnar Kinzelbach, University of Rostock, who kindly donated the †M. tertiaria specimen used in this study to H. P. Thanks is also due to Julia Herzen, GKSS, for support at the beamline. We thank Carina Dressler, Dr. Frank Friedrich, and Monica Koeth for their help in the collection of synchroton data. The financial support by the DFG (BE 1789/4-1) and the support of the DESY facilities (project number, I-20080104) are also gratefully acknowledged.
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Communicated by Robert Reisz
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Pohl, H., Wipfler, B., Grimaldi, D. et al. Reconstructing the anatomy of the 42-million-year-old fossil †Mengea tertiaria (Insecta, Strepsiptera). Naturwissenschaften 97, 855–859 (2010). https://doi.org/10.1007/s00114-010-0703-x
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DOI: https://doi.org/10.1007/s00114-010-0703-x