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Exceptional preservation of marine diatoms in upper Albian amber

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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https://hal-insu.archives-ouvertes.fr/insu-00352940
Contributor : Isabelle Dubigeon <>
Submitted on : Wednesday, January 14, 2009 - 11:17:02 AM
Last modification on : Wednesday, September 2, 2020 - 3:31:59 AM

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  • HAL Id : insu-00352940, version 1

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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, Geological Society of America, 2009, 37 (1), pp.83-86. ⟨insu-00352940⟩

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