
Alexis Rastier - Sigillaria 🌴
@AlexisRastier
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PhD student in Devonian paleobotany in the #EDDyLab at the @UniversiteLiege, Research assistant in the Swedish Museum of Natural History🌱🌲🌺🌿🌍
Lullin, France
Joined February 2018
For this #FossilFriday, I have some internal casts of a 360 million year old arborescent lycophyte with no further taxonomical assignment yet. It thrived in a high energy environment, often disturbed by flooding and storms that formed the conglomerates. #Palaeobotany #Paleobotany
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In 2025, I presented some new results from my PhD dedicated to the Latest Famennian flora of Euramerica🌿 in the Swedish Museum (NRM) and at Agora Paleobotanica in Paris. At Agora, I was awarded the Boureau Prize for the best oral presentation. 😄🏆 #Paleobotany #Devonian
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I once found the world’s biggest moss in a cloud forest in Papua New Guinea - I think this is Dawsonia superba & a single sprig is the length of my hand! Anyone else get really strong Carboniferous vibes? I was expecting a Meganeura to appear any minute
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Traces of dipnoan fish document the earliest adaptations of vertebrates to move on land Art by Jakub Zalewski https://t.co/Nnt2DzmoRh
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Accepted paper now online in @annbot ! "Convergent evolution of the developmental anatomy of leaf abscission: evidence from the arboreous lycopsid Sigillaria" @FieldMuseum
https://t.co/P6tCr08xiq
academic.oup.com
AbstractBackground and Aims. A striking feature of late Paleozoic arboreous lycopsids is the presence of leaf scars, set within leaf cushions, that blanket
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Call for Papers: 2026 Focus Issue on Early Land Plant Evolution – Phylogenetics, Paleobotany, and Evo-devo Physiology. Submission Deadline: 03/2026. https://t.co/iBJFZ9kIbl
#plantscience
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📢 deeptime: an R package that facilitates highly customizable and reproducible visualizations of data over geological time intervals 🔗 https://t.co/xYKZR4ah0U Fully #openaccess in @BigEarthData1 with insight about deeptime 📦 development and code examples! #rstats #geology
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Conférence et Rencontre avec les abonnés Date: Lundi 5 mai 2025 Dernier Bar Avant la Fin du Monde de Lille 12 Rue de Pas, 59000 Lille https://t.co/FVZzohpeLB
https://t.co/Av43l2yjhR
https://t.co/YIgqzCIxuK
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It might sound crazy but we are going to build up a life-size sculpture of Mosasaurus right in the city center of Liège! You can discover and contribute to project via this link! https://t.co/zRDvZzxkZu
promethea.koalect.com
Faites un don pour voir une sculpture de Mosasaure, l'emblématique reptile de la Meuse, sortir de l'eau à Liège !
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2025 ESCONI Gem, Mineral, and Fossil Show - Preview #1: Crenulopteris acadica plate! #fern #show #fossil #paleontology #MazonCreek #pennsylvanian The first of a series of previews! https://t.co/zhVdHziGxY
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Visiting the collections has always helped me grow as a scientist, and seeing some cool fossil plants I had only read about was even cooler. Thanks to the Museum für Naturkunde for hosting me this week! #paleobotany
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Really proud to have finally submitted my Ph.D. manuscript 🥳 I would like to thanks everyone who helped during this adventure, especially @Val_Fisch, @DrTLStubbs and Torsten Scheyer for their brilliant supervision!
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Revision of Sagenopteris : a major lineage of Mesozoic seed plants https://t.co/R2MySLehZo
@wileyearthspace #PapersinPalaeontology
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Two new @frsFNRS funded PhD students in the lab: @melvinvankelst will be working on the biomechanical performances of Eocene-Oligocene carnivorous mammals and @AlexisRastier will be investigating the latest Devonian turnovers in plant communities!
📢 Résultats de l'appel Bourses FRIA 2024 ! Ce 10 décembre 2024, le Conseil d'administration du FRIA a octroyé une bourse de doctorat aux candidates et candidats suivants : 👉👉 https://t.co/29nfwPnnkG
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By the late Devonian, these two pioneers were part of a wave of euphyllophytes that independently converged on the development of leaves. 🌱🌿
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#FossilFriday 🌿 Behold the late Devonian Cephalopteris and its Belgian relative Rhacophyton! These early ferns showcase fascinating planated yet unlaminated ultimate appendages—an evolutionary step toward the true leaves we know today. #Paleobotany
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Here's some new #paleoart of the #Carboniferous #fern Ankyropteris corrugata, which preserves the earliest evidence of a fiddlehead! Congratulations to @rafadscruz and @Sandy_Heth on the publication of this study! https://t.co/qidxXiOygf
#paleobotany #FossilFriday
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Rafael @rafadscruz and I are excited to share our new paper about fern fiddlehead evolution @CurrentBiology Read the paper at https://t.co/33fd2Zd2S6 Want to find out more watch our video below 👇👇 @MPEG_Edinburgh @PalaeoJules @SBSatEd @EdinburghUni
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If Jack had lived in the coal swamps, 300 million years ago... Who needs a beanstalk, when you’ve got a giant club-moss to climb, reaching over 40 metres into the sky! #FossilFriday #MuseumAdvent
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One in 10 woody plants build domatia, tiny homes for mites on their leaves. The mites benefit the plants by eating fungal and arthropod pests. The relationship is so successful that mite domatia have independently evolved hundreds of times. In PNAS: https://t.co/MMdTRd6FUf
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