The intriguing marine diatom genus Corethron in Late Cretaceous amber from Vendée (France)

Corethron Castracane is a marine planktonic diatom genus that is widespread in cold-water assemblages at the present day. Its fossil record was known previously to range from the middle Eocene to the Holocene. Here, we report the earliest occurrence of Corethron in Late Cretaceous (Cenomanian to San...

Full description

Saved in:
Bibliographic Details
Published in:Cretaceous research 2015-01, Vol.52 (part A), p.64-72
Main Authors: Saint Martin, Simona, Saint Martin, Jean-Paul, Schmidt, Alexander R., Girard, Vincent, Néraudeau, Didier, Perrichot, Vincent
Format: Article
Language:English
Subjects:
Bacillariophyceae
Earth Sciences
Fossil resin
France
Palaeoecology
Santonian–Cenomanian
Sciences of the Universe
Taphonomy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Corethron Castracane is a marine planktonic diatom genus that is widespread in cold-water assemblages at the present day. Its fossil record was known previously to range from the middle Eocene to the Holocene. Here, we report the earliest occurrence of Corethron in Late Cretaceous (Cenomanian to Santonian) amber from Vendée, northwestern France, thus extending the first appearance datum by about 40–55 million years and supporting the molecular phylogenetic estimates proposed for the origin of this lineage. The presence of Corethron in amber is a special case of biostratinomy where a marine taxon is incorporated into the liquid resin produced by trees, implying that the Vendean amber forest grew in a nearshore environment where wind, sea-spray, or high tide introduced the marine diatom frustules into the terrestrial realm.
ISSN:0195-6671
1095-998X
DOI:10.1016/j.cretres.2014.07.006