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Journal Articles Geology Year : 2009

Exceptional preservation of marine diatoms in upper Albian amber

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Abstract

Late Albian amber from Charente-Maritime (southwestern France) contains the first known marine diatoms preserved in a fossil resin. Approximately 70 inclusions were assignable to the genera Basilicostephanus, Coscinodiscus, Hemiaulus, Melosira, Paralia, Skeletonema, Stephanopyxis, Trochosira, ?Aulacoseira, and to the order Rhizosoleniales. Some of them are represented by several species. This diatom assemblage is mainly composed of colonial planktonic genera, which are typical for coastal shallow waters. The newly found amber inclusions extend the fossil record of four genera and one order from the Late Cretaceous and support certain molecular phylogenetic assumptions regarding the diversifi cation of marine diatoms in the Early Cretaceous. The unusual introduction of diatom shells from the beach or sea by wind, spray, or high tide onto the resin fl ows was possible because the amber forest grew close to the seashore.
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Dates and versions

insu-00352940 , version 1 (14-01-2009)

Identifiers

  • HAL Id : insu-00352940 , version 1

Cite

Vincent Girard, Simona Saint-Martin, Jean-Paul Saint-Martin, Alexander-R. Schmidt, Steffi Struwe, et al.. Exceptional preservation of marine diatoms in upper Albian amber. Geology, 2009, 37 (1), pp.83-86. ⟨insu-00352940⟩
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