An early record of a vesselless angiosperm from the middle Cenomanian of the Envigne valley (Vienne, Western France)

Boura, Anaïs; Saulnier, Gwenaëlle; Franceschi, Darío De; Gómez, Bernard; Daviero‐Gomez, Véronique; Pons, Denise; Garcia, Géraldine; Robin, Ninon; Boiteau, J-M; Valentin, Xavier

doi:10.1163/22941932-40190238

Cited by 3 publications

(2 citation statements)

References 71 publications

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“…The beds mainly consist of fine, green quartz sands, sometimes brown to yellow, glauconitic with consolidated calcareous sandstones, locally called "Grison". This facies is comparable to the "sands of Vierzon" of Alcaydé et al (1976), which correspond to the base of the Cenomanian and well exposed from Marigny Brizay to Châtellerault Boura et al (2019). The amber grains were collected from a lenticular, dark, clayey bed at the base of the section (Fig.…”

Section: Scorbé-clairvaux-la Bergeonneau (Scb)supporting

confidence: 58%

“…1). The series continues up into green sandstones, already described by Mathieu (1960Mathieu ( , 1968, and progressively reaches up into 30 m in thickness in Colombiers; they contain rich fossil wood and oyster shells (Exogyra colomba Lamarck, 1819), which are dated as middle Cenomanian in age (Robin et al, 2018;Boura et al, 2019). They are overlaid by upper Cenomanian marlstones, locally called "Chalk tufa", which bear Calycoceras Hyatt, 1900, by lower Turonian beds with Mammites nodosoides Schlüter, 1871 and Lewesiceras peramplum Mantell 1822, and by flint breccia deposits containing a few plant megafossil inclusions (Gomez et al, 2018).…”

Section: General Overviewmentioning

confidence: 82%

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New fossil assemblage with amber, plants and vertebrates from the lower Cenomanian near Châtellerault (Vienne, western France)

Valentin

Garcia

Gómez

et al. 2020

BSGF - Earth Sci. Bull.

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A large number of fossil-rich beds have been located from over 30 km along the Tours-Poitiers High Speed Line (LGV) during earthworks prior to its construction, and particularly amber was collected from Scorbé-Clairvaux (locality of La Bergeonneau) to the north of Poitiers. The paper describes also amber grains from Châtellerault (locality of La Désirée) discovered during the development of sewage treatment plant along the Vienne river. Inner Cenomanian shelly sandstones and siltstones of Scorbé-Clairvaux contain rare amber pieces associated with seed plants (Frenelopsis sp., Nehvizdya sp., and angiosperm seeds) and a diversified fauna, composed of micro-remains of 27 taxa, comprising elasmobranchs (Carcharias Haimerichia amonensis Cappetta et Case, 1975, Protolama sp. and Squalicorax sp.), actinopterygians (Enchodus sp. and Pycnodontidae), reptiles including vertebrae the marine snake Simoliophis rochebrunei Sauvage,1880 , some rare solemydid plates (cf. Plastremys), teeth of three crocodilian families (Apatosauridae, Goniopholididae and Bernissartiidae) and an undetermined dinosaurian long bone fragment.

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Section: Scorbé-clairvaux-la Bergeonneau (Scb)supporting

confidence: 58%

Section: General Overviewmentioning

confidence: 82%

New fossil assemblage with amber, plants and vertebrates from the lower Cenomanian near Châtellerault (Vienne, western France)

Valentin

Garcia

Gómez

et al. 2020

BSGF - Earth Sci. Bull.

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First South American Record ofWinteroxylon, Eocene of Laguna del Hunco (Chubut, Patagonia, Argentina): New Link to Australasia and Malesia

Brea

Iglesias

Wilf

et al. 2021

International Journal of Plant Sciences

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Plant hydraulic architecture through time: lessons and questions on the evolution of vascular systems

Decombeix

Boura

Tomescu

2019

IAWA J.

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Studies of anatomically preserved fossils provide a wealth of information on the evolution of plant vascular systems through time, from the oldest evidence of vascular plants more than 400 million years ago to the rise of the modern angiosperm-dominated flora. In reviewing the key contributions of the fossil record, we discuss knowledge gaps and major outstanding questions about the processes attending the evolution of vascular systems. The appearance and diversification of early vascular plants in the late Silurian-Devonian was accompanied by the evolution of different types of tracheids, which initially improved the hydraulics of conduction but had less of an effect on mechanical support. This was followed in the Devonian and Carboniferous by an increase in complexity of the organization of primary vascular tissues, with different types of steles evolving in response to mechanical, hydraulic, and developmental regulatory constraints. Concurrently, secondary vascular tissues, such as wood, produced by unifacial or bifacial cambia are documented in a wide array of plant groups, including some that do not undergo secondary growth today. While wood production has traditionally been thought to have evolved independently in different lineages, accumulating evidence suggests that this taxonomic breadth reflects mosaic deployment of basic developmental mechanisms, some of which are derived by common ancestry. For most of vascular plant history, wood contained a single type of conducting element: tracheids (homoxyly). However, quantitative (e.g. diameter and length) and qualitative (e.g. pitting type) diversity of these tracheids allowed various taxa to cover a broad range of hydraulic properties. A second type of conducting elements, vessels, is first documented in an extinct late Permian (c. 260 Ma) group. While the putative hydraulic advantages of vessels are still debated, wood characterized by presence of vessels (heteroxyly) would become the dominant type, following the diversification of angiosperms during the Cretaceous.

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An early record of a vesselless angiosperm from the middle Cenomanian of the Envigne valley (Vienne, Western France)

Cited by 3 publications

References 71 publications

New fossil assemblage with amber, plants and vertebrates from the lower Cenomanian near Châtellerault (Vienne, western France)

New fossil assemblage with amber, plants and vertebrates from the lower Cenomanian near Châtellerault (Vienne, western France)

First South American Record ofWinteroxylon, Eocene of Laguna del Hunco (Chubut, Patagonia, Argentina): New Link to Australasia and Malesia

Plant hydraulic architecture through time: lessons and questions on the evolution of vascular systems

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