Dr. Thore Friesenhagen Profile

Dr. Thore Friesenhagen

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Proceedings Article | 23 October 2024 Presentation + Paper

X-ray microtomography of fossil types in natural history collections

Loïc Costeur, Thore Friesenhagen, Georg Schulz

Proceedings Volume 13152, 131521D (2024) https://doi.org/10.1117/12.3028651

KEYWORDS: X-rays, Skull, Data modeling, Biodiversity, 3D modeling, Biological imaging, Databases, Teeth, Copper, X-ray imaging

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Imaging natural history collections is becoming an important conservation tool that also serves research purposes. Herbaria are at the forefront of this new area, where automatic conveyor belts can scan thousands of sheets per day. The production of high quality images is used as a tool for inventory, monitoring, communication, data exchange between scientists and new taxonomic identifications. Microtomography of collection items with these aims is much more time-consuming and expensive. While it has been so far limited to rare and important specimens such as types or reference specimens (i.e., historically or scientifically important specimens; the data generated takes conservation to another level. This is because nit captures not only surface features, but also very fine texture and internal structures are digitally recorded, depicting the object in almost all its complexity and dimensions. Generating this kind of data helps researchers achieve their goals, provides first-hand scientific data, limits further handling of sometimes fragile specimens and, can help reduce the ecological footprint of scientific travel. In this work, we illustrate the power of microtomography in conservation work by imaging fossil type specimens (i.e. remains of extinct organisms used to designate new species) which are witnesses of past life on our planet. They provide information on how today’s biodiversity has evolved and are a good indicator for the past climates. In addition, they often fascinate a wide audience and are therefore good ambassadors for communicating scientific findings. Recording them with the help of x-ray microtomography should therefore be a general goal, which we illustrate here with examples.

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