Illuminating the dark mess of fibers: Application of circular cross polarized light in unravelling the bone tissue structure of the dermal pectoral girdle of Metoposaurus krasiejowensis

Journal of Anatomy, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 17, 2025

Abstract Current understanding of the histology dermoskeleton tetrapods comes from fossilized and recent remains skulls, osteoderms, carapace, plastron other postcranial material which were always investigated using linear cross polarized light (LCPL) microscopy. The pectoral girdle vast majority non‐amniote tetrapods, including temnospondyls evolved large ventrally located dermal bones‐ interclavicle a pair clavicles. Despite that, there is lack information about bone tissue structure these bones. This study used circular (CCPL) to investigate composition Metoposaurus krasiejowensis , Late Triassic temnospondyl known have massive bones could played role in buoyancy control aquatic amphibians. novel technique shines into fine interwoven structural fibers (ISF), common matrix found ossified tissues, mesh loops strands collagen instead lattice patterned as described previously by LCPL previous studies that dealt with elements origin. Our result ISF achieved eliminating fiber extinction under CCPL visualization. feature also sheds transitional forms between parallel‐fibered matrices was never observed. shows historical skeletal limited not only due sampling but limitations mineralized visualization LCPL.

Language: Английский

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Preserving Fossilized Soft Tissues: Advancing Proteomics and Unveiling the Evolutionary History of Cancer in Dinosaurs

Biology, Journal Year: 2025, Volume and Issue: 14(4), P. 370 - 370

Published: April 3, 2025

Understanding how life-history strategies influence cancer susceptibility in dinosaurs requires a molecular-level analysis of preserved soft tissues. While previous research has largely focused on skeletal remains, the discovery tissue structures fossils, such as Telmatosaurus transsylvanicus, highlights need for new approach. Paleoproteomics offers transformative opportunity to analyze ancient proteins, revealing evolutionary trade-offs between growth, reproduction, and suppression. This study argues that prioritizing fossil collection preservation is crucial, future advances molecular techniques will allow deeper insights into disease evolution. By integrating theory with paleopathology, we can better understand selective pressures shaped extinct species identify potential mechanisms tumor resistance. commentary necessity long-term conservation efforts support breakthroughs biology comparative oncology.

Language: Английский

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Ancient Diseases in Vertebrates: Tumours through the Ages

Animals, Journal Year: 2024, Volume and Issue: 14(10), P. 1474 - 1474

Published: May 15, 2024

Paleo-oncology studies neoplastic diseases in fossilised animals, including human remains. Recent advancements have enabled more accurate diagnoses of ancient pathologies despite the inherent challenges identifying tumours fossils—such as rarity well-preserved specimens, predominance bone remains, and difficulty distinguishing from non-neoplastic lesions. This study compiles reports highlighting that neoplasms are present a wide range vertebrates drawing comparisons to modern instances similar diseases. The findings underscore multifactorial aetiology tumours, which involves genetic, environmental, lifestyle factors, suggest been around for at least 350 million years.

Language: Английский

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Mechanically Derived Phenomena

Springer eBooks, Journal Year: 2023, Volume and Issue: unknown, P. 167 - 227

Published: Jan. 1, 2023

Language: Английский

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