Chemical signatures of soft tissues distinguish between vertebrates and invertebrates from the Carboniferous Mazon Creek Lagerstätte of Illinois.
Tully Monster
chitin
chordate
in situ Raman spectroscopy
keratin
protein fossilization products
Journal
Geobiology
ISSN: 1472-4669
Titre abrégé: Geobiology
Pays: England
ID NLM: 101185472
Informations de publication
Date de publication:
09 2020
09 2020
Historique:
received:
20
08
2019
revised:
17
01
2020
accepted:
27
03
2020
pubmed:
30
4
2020
medline:
21
10
2020
entrez:
30
4
2020
Statut:
ppublish
Résumé
The chemical composition of fossil soft tissues is a potentially powerful and yet underutilized tool for elucidating the affinity of problematic fossil organisms. In some cases, it has proven difficult to assign a problematic fossil even to the invertebrates or vertebrates (more generally chordates) based on often incompletely preserved morphology alone, and chemical composition may help to resolve such questions. Here, we use in situ Raman microspectroscopy to investigate the chemistry of a diverse array of invertebrate and vertebrate fossils from the Pennsylvanian Mazon Creek Lagerstätte of Illinois, and we generate a ChemoSpace through principal component analysis (PCA) of the in situ Raman spectra. Invertebrate soft tissues characterized by chitin (polysaccharide) fossilization products and vertebrate soft tissues characterized by protein fossilization products plot in completely separate, non-overlapping regions of the ChemoSpace, demonstrating the utility of certain soft tissue molecular signatures as biomarkers for the original soft tissue composition of fossil organisms. The controversial problematicum Tullimonstrum, known as the Tully Monster, groups with the vertebrates, providing strong evidence of a vertebrate rather than invertebrate affinity.
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
560-565Informations de copyright
© 2020 John Wiley & Sons Ltd.
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