1. Identification of Carboniferous (320 million years old) class Ic amber.
- Author
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Bray PS and Anderson KB
- Subjects
- Amber classification, Cycadopsida chemistry, Cycadopsida genetics, Diterpenes metabolism, Fossils, Illinois, Magnoliopsida chemistry, Magnoliopsida genetics, Magnoliopsida metabolism, Naphthalenes analysis, Naphthalenes metabolism, Stereoisomerism, Terpenes analysis, Terpenes metabolism, Time, Tracheophyta chemistry, Tracheophyta genetics, Tracheophyta metabolism, Amber chemistry, Biological Evolution, Cycadopsida metabolism, Diterpenes analysis
- Abstract
The presence of amber, the fossil form of the resins produced by many types of higher plants, has been reported from many localities in Mesozoic and Cenozoic rocks. We have found Class I (polylabdanoid) amber in Carboniferous sediments dating to approximately 320 million years ago. This result demonstrates that preconifer gymnosperms evolved the biosynthetic mechanisms to produce complex polyterpenoid resins earlier than previously believed and that the biosynthetic pathways leading to the types of polylabdanoid resins that are now typically found in conifers and those now typically found in angiosperms had already diverged by the Carboniferous.
- Published
- 2009
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