References of "Prestianni, Cyrille"
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See detailPITYOSTROBUS ANDRAEI (PINACEAE) FROM THE BARREMIAN (LOWER CRETACEOUS) OF BELGIUM: A MORPHOMETRIC REVISION
De Brito, Léa ULiege; Prestianni, Cyrille ULiege

in International Journal of Plant Sciences (2021), 182(3),

Important floristic changes took place during the Early Cretaceous (145.0–100.5 Ma). They are notably marked by a peak in conifer diversity, especially within Pinaceae. This diversification is attested to ... [more ▼]

Important floristic changes took place during the Early Cretaceous (145.0–100.5 Ma). They are notably marked by a peak in conifer diversity, especially within Pinaceae. This diversification is attested to by the numerous ovulate cone taxa found in the western European and North American fossil records. Exceptional deposits in the Wealden facies (Barremian-Albian, 125.0–100.5 Ma) of western Belgium (La Louvière, Houdeng-Aimeries) have yielded hundreds of exceptionally well-preserved pinaceous ovulate cones, yet most of these remain unstudied. These are presently revised. We investigate the morphological variation of the most abundant species, Pityostrobus andraei (Coemans) Seward 1919, with a morphometric approach. This work applies statistical tests to a large sample (n p 132 fossil cones) for the first time, using 10 measurements to characterize the morphology of the cones. Our analyses recover eight distinct morphotypes included in the original specific concept of P. andraei, and most of the specimens belong to two main morphotypes that represent 50% and 25% of the total specimens analyzed. Our results suggest that the specific diversity of early Pinaceae is underestimated, as it is based on older species concepts. Modern quantitative approaches have the potential to better characterize the breadth and tempo of pinaceous diversification. [less ▲]

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See detailThe Devonian–Carboniferous boundary in Belgium and surrounding areas
Denayer, Julien ULiege; Prestianni, Cyrille ULiege; Mottequin, Bernard et al

in Palaeobiodiversity and Palaeoenvironments (2020)

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See detailLes Pinacées au Crétacé Inférieur, état de leur diversité et de leur dynamique évolutive
De Brito, Léa ULiege; Prestianni, Cyrille ULiege

Conference (2019, April)

Au Crétacé Inférieur (145,0-100,5 Ma), d’importants renouvellements floristiques ont lieu, notamment par un pic de diversité chez les conifères et plus exactement au sein de la famille des Pinacées ... [more ▼]

Au Crétacé Inférieur (145,0-100,5 Ma), d’importants renouvellements floristiques ont lieu, notamment par un pic de diversité chez les conifères et plus exactement au sein de la famille des Pinacées (Oyston et al., 2015; Watkins & Cardelús, 2012). Cette expansion est représentée par de nombreux fossiles qui sont trouvés surtout en Europe de l’Ouest et en Amérique du Nord. A la fin du 19ème siècle, en parallèle de la découverte des iguanodons de Bernissart et de la faune associée, de nombreux fossiles de conifères, notamment des cônes femelles, ont été récoltés dans les faciès continentaux du Wealdien (129,4-125,0 Ma), sur plusieurs localités en Belgique. Ces fossiles, conservés dans les collections de l’Institut Royal des Sciences Naturelles de Belgique représentent des centaines de cônes, extrêmement bien conservés qui ont été décrit au milieu du 20ème siècle (Alvin, 1953, 1957, 1960). Les espèces de Pinacées du Crétacé Inférieur recensées en Belgique sont au nombre de 14, ce qui représente environ 30% des espèces de cônes fossiles connus à cette période. La plupart des études phylogénétiques basées sur des données moléculaires et morphologiques de Pinacées incluent donc ces espèces belges. Une étude préliminaire a montré que la délimitation des espèces au sein de ces Pinacées belges avait été mal évaluée. Ce qui induit un biais systématique supplémentaire au sein des phylogénies (incluant espèces fossiles et actuelles) qui sont déjà peu résolues. Les phylogénies montrent la paraphylie du genre de forme Pityostrobus Nathorst emend. Dutt 1916 et confirment la proximité des espèces de Pinus actuelles avec les genres de forme Pityostrobus et Pseudoaraucaria Fliche 1896. Grâce à l’échantillon fossile étendu à disposition, l’objectif est de développer un protocole d’analyse de forme afin de soutenir les descriptions de ces cônes et d’appréhender leur disparité morphologique intra et inter-spécifique, à l’aide de morphométrie traditionnelle et géométrique. En parallèle, le but est de réaliser un référentiel sur des espèces de Pinacées actuelles (cônes de Pinus nigra et Picea abies) afin de pouvoir interpréter et comparer la disparité morphologique des cônes fossiles. De plus, la conservation exceptionnelle de ces cônes permet de tester la nano et micro tomographie à rayons X sur ces fossiles, ce qui donne accès à une meilleure observation des structures internes pour les descriptions. Cette étude vise également à approfondir les hypothèses biogéographiques à propos d’une diversification d’origine Européenne et d’Amérique du Nord (Smith et al., 2016). Les premiers résultats obtenus permettent l’application de tests statistiques sur un échantillon fossile étendu dont les résultats pourront être inclus dans des études visant à quantifier la variabilité des espèces actuelles. L’utilité de la morphométrie, sur ce type de restes est confirmée, et ouvre la porte à une application sur les autres espèces de Pinacées trouvées en Belgique, et ailleurs dans le monde. [less ▲]

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See detailDiversity of Pityostrobus andraei (Pinaceae) from the Belgian Wealden : morphometry and phylogeny.
De Brito, Léa ULiege; Prestianni, Cyrille ULiege

Conference (2019, March 19)

In the Lower Cretaceous (145.0-100.5 Ma), important floristic changes take place. They are notably marked by a peak of diversity in conifers and more precisely in the Pinaceae family. This expansion is ... [more ▼]

In the Lower Cretaceous (145.0-100.5 Ma), important floristic changes take place. They are notably marked by a peak of diversity in conifers and more precisely in the Pinaceae family. This expansion is particularly clear among the numerous female cone fossils that are found mainly in Western Europe and North America. Exceptional deposits in the Belgian Wealden facieses (125.0 – 100.5 Ma, La Louvière, Houdeng-Aimeries), have delivered hundreds of exceptionally well preserved cones. The most represented species, Pityostrobus andraei has been studied following a traditional morphometric and geometric framework to test intra and interspecific variations. The descriptions and morphometry show that two species are included in P. andraei. A preliminary phylogenetic analysis shows paraphily of the form-genus Pityostrobus and confirms clades that are found in previous phylogenies, as well as the proximity of current Pinus species with the form genera Pityostrobus and Pseudoaraucaria. The non-metric multidimensional scaling supports the biogeographic hypothesis of a European and North American diversification. This work allows the application of statistical tests on a large fossil sample and opens doors to future comparisons with current variability. It confirms the usefulness of morphometry on this type of remains, which can be applied to other Pinaceae species found in Belgium and elsewhere in the world. [less ▲]

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See detailWelcome to papers from the 4th International Meeting of Agora Paleobotanica-Preface
Cascales-Minaña, B.; Prestianni, Cyrille ULiege; Gerrienne, Philippe ULiege

in Earth and Environmental Science Transactions of the Royal Society of Edinburgh (2019), 108(4), 337-338

On 7-9 July 2016, the palaeontological association Agora Paleobotanica organised its fourth international meeting. It took place at the National History Museum of Brussels and was attended by 45 delegates ... [more ▼]

On 7-9 July 2016, the palaeontological association Agora Paleobotanica organised its fourth international meeting. It took place at the National History Museum of Brussels and was attended by 45 delegates. This special volume of the Earth and Environmental Science Transactions of the Royal Society of Edinburgh compiles key papers presented at this meeting. The topics covered include a wide variety of Devonian to Miocene plant taxa, with exciting new data on both mega- A nd microfossils. © 2018 The Royal Society of Edinburgh. [less ▲]

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See detailRevision of the Devonian-Carboniferous Boundary in Belgium and surrounding areas: a scenario
Denayer, Julien ULiege; Prestianni, Cyrille ULiege; Mottequin, Bernard et al

in Kölner Forum für Geologie und Paläontologie (2019), 23

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See detailField trip A1: The Uppermost Devonian and Lower carboniferous in the type area of Southern Belgium
Denayer, Julien ULiege; Prestianni, Cyrille ULiege; Mottequin, Bernard et al

in Kölner Forum für Geologie und Paläontologie (2019), 24

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See detailLilingostrobus chaloneri gen. et sp. nov., a Late Devonian woody lycopsid from Hunan, China
Gerrienne, Philippe ULiege; Cascales-Minana, Cascales; Prestianni, Cyrille ULiege et al

in PLoS ONE (2018), 13(7), 1-25

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See detailA new Late Devonian heterosporous woody plant from South China
Cascales-Minana, B.; Gerrienne, Philippe ULiege; Prestianni, Cyrille ULiege et al

Conference (2018, July)

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See detailLes bacheliers du bloc 1 Géologie de l'ULiège. Journées de terrain, travaux pratiques: Évolution des environnements et de la tectonique de la région de Boulogne-sur-Mer, Wimereux et Wissant, sous la conduite du Prof. Valentin Fischer et de ses collaborateurs. Séquence video et photos
Marion, Jean-Marc ULiege; Fischer, Valentin ULiege; Denayer, Julien ULiege et al

Learning material (2018)

Field days are essential in learning and understanding geology. From April 16 to 18, 2018, graduates from block 1 Geology of the University of Liège (Belgium) studied the evolution of environments and ... [more ▼]

Field days are essential in learning and understanding geology. From April 16 to 18, 2018, graduates from block 1 Geology of the University of Liège (Belgium) studied the evolution of environments and tectonics in the region of Boulogne-sur-Mer, Wimereux and Wissant (France). [less ▲]

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See detailEvent stratigraphy accross the DevonianCarboniferous – New views from the shelf
Denayer, Julien ULiege; Mottequin, Bernard; Prestianni, Cyrille ULiege et al

Conference (2018)

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See detailLetters to the twenty-first century botanist. Second series: “what is a seed?”–3. How did we get there? Palaeobotany sheds light on the emergence of seed
Meyer-Berthaud, B.; Gerrienne, Philippe ULiege; Prestianni, Cyrille ULiege

in Botany Letters (2018), 165(3-4), 434-439

This paper discusses the main steps leading to the acquisition, during the Palaeozoic, of the seed habit. The earliest spermatophytes originated in the Late Devonian and produced small cupulate ovules ... [more ▼]

This paper discusses the main steps leading to the acquisition, during the Palaeozoic, of the seed habit. The earliest spermatophytes originated in the Late Devonian and produced small cupulate ovules characterized by an elaborated sporangial apex involved in pollination. The diversification of ovules during the Carboniferous led to a wider range of sizes and shapes, and an increasing importance of the integument. The earliest seeds containing embryos are reported in Carboniferous coniferophytes. © 2018, © 2018 Société botanique de France. [less ▲]

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See detailin and out-of sequence event stratigraphy across the Devonian-Carboniferous Boundary - a view from the shelf in S Belgium
Denayer, Julien ULiege; Mottequin, Bernard; Prestianni, Cyrille ULiege et al

in 33rd International Meeting of Sedimentology - 16ème Congrès français de sédimentologie : Abstract book (2017, October)

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See detailStratigraphy and depositional environments of the Late Famennian (Late Devonian) of Southern Belgium and characterization of the Strud locality
Denayer, Julien ULiege; Prestianni, Cyrille ULiege; Gueriau, Pierre et al

in Geological Magazine (2016), 153(1), 112-127

The Famennian (Upper Devonian, c. 372 to 359 Ma) strata of Belgium have recently received much attention after the discoveries of early tetrapod remains and outstandingly preserved continental arthropods ... [more ▼]

The Famennian (Upper Devonian, c. 372 to 359 Ma) strata of Belgium have recently received much attention after the discoveries of early tetrapod remains and outstandingly preserved continental arthropods. The Strud locality has yielded a diverse flora and fauna including seed-plants, tetrapods, various placoderm, actinopterygian, acanthodian and sarcopterygian fishes, crustaceans (anostracans, notostracans, conchostracans and decapods) and a putative complete insect. This fossil assemblage is one of the oldest continental – probably fresh-water – ecosystems with a considerable vertebrate and invertebrate diversity. The study of the palaeoenvironment of the Strud locality is crucial because it records one of the earliest and most important phases of tetrapod evolution that took place after their emergence but before their terrestrialization. It raises the question of environmental and ecological conditions for the Devonian aquatic ecosystem and the selection pressures occurring at the onset of tetrapod terrestrialization. The present study characterized the fluvial facies of the Upper Famennian sedimentary rocks of Strud and the surrounding areas. The exceptional preservation of arthropods and plants in the main fossiliferous layers is explained by rapid burial in the fine-grained sediment of the quiet and confined flood plain environment. Newly investigated fossiliferous sections in the Meuse–Samson area led to the description and correlation of key sections (Strud, Wierde and Jausse sections, complemented by the less continuous Haltinne, Huy and Coutisse sections). Moreover, the investigated sections allowed a review of the age of the fossiliferous horizon, which is now definitely considered to be Late Famennian in age. [less ▲]

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See detailBrabantophyton, a new genus with stenokolealean affinities from a Middle to earliest Upper Devonian locality from Belgium
Momont, Nicolas ULiege; Gerrienne, Philippe ULiege; Prestianni, Cyrille ULiege

in Review of Palaeobotany and Palynology (2016)

A new taxon with stenokolealean affinities, Brabantophyton runcariense gen. et sp. nov., is described from seven pyrite permineralized axes collected from the mid Givetian to earliest Frasnian (late ... [more ▼]

A new taxon with stenokolealean affinities, Brabantophyton runcariense gen. et sp. nov., is described from seven pyrite permineralized axes collected from the mid Givetian to earliest Frasnian (late Middle to earliest Upper Devonian) locality of Ronquières (Belgium). The specimens include stems and lateral organs. The stems are characterized by a protostele dissected into three primary ribs, each of them dividing into two secondary ribs. The protostele shows a central protoxylem strand and numerous strands distributed along the midplanes of the ribs. The vascular supply to lateral organ is composed of two pairs of traces, produced at the same time by the two ribs issued from a single primary rib of the protostele. Within each pair, the shape and the size of the traces are unequal: one is T-shaped and the other is oval to reniform. The T-shaped traces of each pair face each other. The inner cortex of the lateral organs is parenchymatous and the outer cortex is sparganum-like. The specimens of Brabantophyton runcariense show many similarities with the stenokolealean genus Crossia virginiana Beck and Stein, but the vascular supply of lateral organs of the latter consists of a more symmetrical and distinctively simpler pair of traces. Brabantophyton represents the first report of the Stenokoleales in southeastern Laurussia. The characteristics of the Brabantophyton protostele compare better with the anatomy of the radiatopses, and, within the latter, particularly with basal seed plants. [less ▲]

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See detailProceedings of the 4th International Meeting of Agora Paleobotanica, Brussels 2016
Prestianni, Cyrille ULiege; Cascales-Miñana, Borja ULiege; Gerrienne, Philippe ULiege et al

Book published by Agora Paleobotanica (2016)

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