Diversity and histology of a plant litter bed from the Cenomanian of Archingeay–Les Nouillers (southwestern France)

Gómez, Bernard; Coiffard, Clément; Dépré, Éric; Daviero‐Gomez, Véronique; Néraudeau, Didier

doi:10.1016/j.crpv.2007.12.006

Cited by 40 publications

(51 citation statements)

References 16 publications

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“…The sources of the amber were mixed coastal forests at the eastern rim of the young Atlantic Ocean (2,14). These woods were dominated by the conifer families Araucariaceae and Cheirolepidiaceae (15)(16)(17). Furthermore, various representatives of the Ginkgoales and Lauraceae grew in these forests (15).…”

Section: Resultsmentioning

confidence: 99%

Evidence for marine microfossils from amber

Girard

Schmidt

Martin

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

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Amber usually contains inclusions of terrestrial and rarely limnetic organisms that were embedded in the places were they lived in the amber forests. Therefore, it has been supposed that amber could not have preserved marine organisms. Here, we report the discovery amber-preserved marine microfossils. Diverse marine diatoms as well as radiolarians, sponge spicules, a foraminifer, and a spine of a larval echinoderm were found in Late Albian and Early Cenomanian amber samples of southwestern France. The highly fossiliferous resin samples solidified Ϸ100 million years ago on the floor of coastal mixed forests dominated by conifers. The amber forests of southwestern France grew directly along the coast of the Atlantic Ocean and were influenced by the nearby sea: shells and remnants of marine organisms were probably introduced by wind, spray, or high tide from the beach or the sea onto the resin flows.Cretaceous ͉ palaeoecology ͉ taphonomy ͉ fossil resin ͉ SW France

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Section: Resultsmentioning

confidence: 99%

Evidence for marine microfossils from amber

Girard

Schmidt

Martin

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

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“…At the French sites, abundant ferns and gymnosperms characterized the littoral flora, as they did throughout Europe (Gomez et al, 2008). In the Charentes region, coniferous forests were arranged in three main zones (Peyrot et al, 2005).…”

Section: Paleoenvironmentmentioning

confidence: 99%

Evolutionary and paleobiological implications of Coleoptera (Insecta) from Tethyan-influenced Cretaceous ambers

Peris

Ruzzier

Perrichot

et al. 2016

Geoscience Frontiers

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International audienceThe intense study of coleopteran inclusions from Spanish (Albian in age) and French (Albian–Santonian in age) Cretaceous ambers, both of Laurasian origin, has revealed that the majority of samples belong to the Polyphaga suborder and, in contrast to the case of the compression fossils, only one family of Archostemata, one of Adephaga, and no Myxophaga suborders are represented. A total of 30 families from Spain and 16 families from France have been identified (with almost twice bioinclusions identified in Spain than in France); 13 of these families have their most ancient representatives within these ambers. A similar study had previously only been performed on Lebanese ambers (Barremian in age and Gondwanan in origin), recording 36 coleopteran families. Few lists of taxa were available for Myanmar (Burmese) amber (early Cenomanian in age and Laurasian in origin). Coleopteran families found in Cretaceous ambers share with their modern relatives mainly saproxylic and detritivorous habits in the larval or adult stages, rather than wood-boring behavior. Fifteen of the coleopteran families occur in both the Lebanese and Spanish ambers; while only five are present in both Spanish and French. Considering the paleogeographic proximity and similarity of age of the Spanish and French ambers, the small number of taxa found in common at both areas is surprising. The ancient origin for the Lebanese and Spanish ambers, the paleogeography (including some barriers for terrestrial biota) and the local paleohabitats are factors that may explain the dissimilarity with the French specimens. Wildfires are believed to be a more likely cause of resin production during the Cretaceous than infestation by beetles. Current knowledge of the beetle species found in the Cretaceous ambers is introduced

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“…In Charente‐Maritime, at Puy‐Puy, Eucalyptolaurus depreii was associated with much diversified angiosperm vegetation accompagnied by a few ferns and conifers deposited in calm freshwater swamp or pond standing along stream channels and/or in an estuary. In contrast, at Font‐Benon, E. depreii is one of the few angiosperms associated with a conifer‐ and ginkgo‐dominated flora, and occur in brackish mudflat deposits (Gomez et al 2004, 2008; Néraudeau et al . 2005).…”

Section: Discussionmentioning

confidence: 99%

Intramarginal Veined Lauraceae Leaves From the Albian–cenomanian of Charente‐maritime (Western France)

Coiffard¹,

Gómez²,

Thiébaut³

et al. 2009

Palaeontology

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Eucalyptolaurus depreii gen. et sp. nov. is proposed for angiosperm leaves newly collected from uppermost Albian -lowermost Cenomanian of Charente-Maritime (western France). They consist of simple, narrow, elongate laminas with entire margins and intramarginal veins. The epidermal cells of adaxial cuticle shows small, rounded, blunt papillae outward that protrude inward and fuse together as rolls along and parallel to the margins, while the adaxial cuticle bears brachyparacytic stomatal apparatus that exhibit sunken guard cells and hair bases consisting of a thick-walled pore surrounded by radially arranged differentiated cells. Resin bodies occur inside the mesophyll. These characters closely resemble the lauroid taxa 'Myrtophyllum' and Pandemophyllum from the Cenomanian of the Czech Republic and Dakota (USA) respectively. The narrow angle of basilaminar secondaries and the whole suite of features in the guard cells (sunken guard cells embedded into subsidiary cells and stomatal ledges) strongly support close affinity with the Lauraceae. From the Cenomanian lauraceous reproductive organs and their related leaves already showed high disparity and diversity. In addition they displayed a broad ecological range from freshwater floodplains to brackish swamps. This combined to high diversity of reproductive organs suggest ecological radiation of Lauraceae by the Cenomanian.Key words: early salt-tolerant angiosperms, Lauraceae, Eucalyptolaurus, cuticles, mid Cretaceous, western France. Kvaček (1983Kvaček ( , 1992 and Nȇmejc and Z. Kvaček (1975) described both detailed venation and cuticle of Myrtophyllum angustum (Velenovský) Knobloch and M. geinitzii Heer from the Cenomanian and Senonian of Bohemian Cretaceous Basins (Czech Republic), but the diagnosis based on the venation only remained unchanged. M. geinitzii Heer was also reported from the Cenomanian of Alcanede in Portugal (Teixeira 1948(Teixeira , 1950 and the Cenomanian-Turonian of Atane in Greenland (Heer 1883; Boyd 1998). In southeastern France, De Saporta (1862) mentioned leaf impressions similar to M. angustum and M. geinitzii collected from the trench Derbèze at Bagnolssur-Cèze (Gard) in sandstones now considered being Early Coniacian in age (Ducreux et al. 1982). De Saporta (1862 and Fritel (1927) also recognized Eucalyptus-like leaves from the Campanian of Fuveau basin (Bouches-du-Rhô ne, southeastern France). In Northern America, only impressions of M. geinitzii Heer were collected from several localities: Albian-Cenomanian of Dakota group (Lesquereux [Palaeontology, Vol. 52, Part 2, 2009, pp. 323-336] Greuter et al. 2000). Velenovský (1883) described the narrow, elongated lauraceous leaves with intramarginal veins Grevillea constans from the Cenomanian of Bohemian Basin. Velenovský (1889) renamed it Grevilleophyllum, Grevillea being a modern genus without any systematic affinity with the fossil. No diagnosis or description was given, and thus Grevilleophyllum should have fallen into nomen nudum. However Z. Kvaček (1983Kvaček ( , 1992...

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Diversity and histology of a plant litter bed from the Cenomanian of Archingeay–Les Nouillers (southwestern France)

Cited by 40 publications

References 16 publications

Evidence for marine microfossils from amber

Evidence for marine microfossils from amber

Evolutionary and paleobiological implications of Coleoptera (Insecta) from Tethyan-influenced Cretaceous ambers

Intramarginal Veined Lauraceae Leaves From the Albian–cenomanian of Charente‐maritime (Western France)

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