Alexis Rastier 🌿
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alexisrastier.bsky.social
Alexis Rastier 🌿
@alexisrastier.bsky.social
190 followers 56 following 8 posts
PhD student in Devonian paleobotany @UniversiteLiege, Research assistant in Triassic paleobotany at the Swedish Museum of Natural History🌱🌲🌺🌿🌍
Posts Replies Media Videos
Reposted by Alexis Rastier 🌿
sandyheth.bsky.social
Brilliant first day of the @embo.org Plant Evolution Workshop!!
gmivienna.bsky.social Gregor Mendel Institute of Molecular Plant Biology @gmivienna.bsky.social · 4d
This year’s @embo.org Workshop is held at the @viennabiocenter.bsky.social. Open to 120 participants, it is over-enrolled with 180 attendees! Thank you to the organizers @isabelmonte.bsky.social, Aino Komatsu, @moodytomato.bsky.social, and Liam Dolan for making this event possible. #EMBOplantEvo
November 25, 2025 at 8:24 PM
Reposted by Alexis Rastier 🌿
newphyt.bsky.social
Arborescent lycopsid establishment and growth

Michael P. D'Antonio and Boyce

nph.onlinelibrary.wiley.com/doi/10.1111/...
Sigillaria approximata tracheids in transverse section from proximal and distal in the trunk.
November 25, 2025 at 10:27 AM
Reposted by Alexis Rastier 🌿
umramap.bsky.social
#AMAPDefense
"Artificial intelligence for biodiversity modeling: from predicting plant species assemblages to understanding and mapping habitats" by César LEBLANC on 28 November 2025 at 2:30 pm CET at Amphi Jacques Alliot, CIRAD - Campus Lavalette
visio : www.youtube.com/live/joGCkJS...
PhD César Leblanc
YouTube video by César Leblanc
www.youtube.com
November 25, 2025 at 1:00 PM
Reposted by Alexis Rastier 🌿
botsocamerica.bsky.social
Production of root suckers in #Glossopteridales from the late Permian of #Antarctica

New #AJB research by Anne-Laure Decombeix & Rudolph Serbet

doi.org/10.1002/ajb2...

#plantscience #glossopterids #paleobotany #fossils #FossilFriday
Cross sections of a Vertebraria root emitting a non-Vertebraria lateral interpreted as the stem of a sucker shoot.
November 20, 2025 at 5:15 PM
Reposted by Alexis Rastier 🌿
palaeojules.bsky.social
Congratulations to @jeremywyman.bsky.social et al 2025 for the publication of their Oxroadia paper! And thanks for bringing me onboard to do some restorations of this relative of Lepidodendron and Isoëtes from the Carboniferous of Scotland.
academic.oup.com/aob/advance-...
#FossilFriday #paleobotany
a figure showing a life restoration of an adult oxroadia, which has many sinuous green stem branching across the ground, and two smaller diagrams of a juvenile plant and a close up of the rooting system.
November 21, 2025 at 2:56 PM
Reposted by Alexis Rastier 🌿
sandyheth.bsky.social
Huge congratulations @jeremywyman.bsky.social @instmolplantsci.bsky.social for publishing the results of your masters thesis @annbot.bsky.social
The work includes a new reconstruction of the Carboniferous isoetalean Oxroadia by the brilliant @palaeojules.bsky.social
academic.oup.com/aob/advance-...
Left, a zoomed out image of the habit of the green branching lycophytes Oxroadia. Right, a zoomed in image of the highly branched rooting system
November 5, 2025 at 10:37 AM
Reposted by Alexis Rastier 🌿
annbot.bsky.social
🔥ADVANCE ACCESS🔥: Convergent evolution of the developmental anatomy of leaf abscission: evidence from the arboreous lycopsid Sigillaria
doi.org/10.1093/aob/...
November 12, 2025 at 3:16 PM
Reposted by Alexis Rastier 🌿
victorleshyk.bsky.social
my new #sciart for @chistinesd.bsky.social: her research in @newphyt.bsky.social reveals arbuscular mycorrhizae in the stem of the early plant Aglaophyton from 407 million years ago, showing that fungal-plant symbioses are as old as the earliest soils. nph.onlinelibrary.wiley.com/doi/10.1111/...
November 13, 2025 at 9:18 PM
Reposted by Alexis Rastier 🌿
aldpaleo.bsky.social
We have a new Dr in #paleobotany! Congratulations to @thibault-durieux.bsky.social who successfully passed his viva. It was a great journey & he made the advising job very easy for
@petermoonlight.bsky.social, Carla Harper and I. Big thanks to the examiners Jenny McElwain & @sandyheth.bsky.social!
November 14, 2025 at 9:50 AM
Reposted by Alexis Rastier 🌿
aldpaleo.bsky.social
Fall colours that are not angiosperm leaves 🤓🌲🌿
#botany
Bright red arils on a green yew branch Yellow sporangia on a green fern leaf
November 8, 2025 at 2:46 PM
Reposted by Alexis Rastier 🌿
aldpaleo.bsky.social
C'est la 29e Réunion des Sciences de la Terre à Montpellier toute la semaine 🌐🌋🦕 Demain après-midi je parlerai du changement de végétation dans la zone tropicale fin Carbonifère-début Permien avec l'exemple des flores de Graissessac & Lodève (session 8.1)⛏️ 🌿 #paleobotany #geosciences #paleontology
Feuillage fossile du Carbonifere / Carboniferous fossil foliage
October 27, 2025 at 7:17 AM
Reposted by Alexis Rastier 🌿
sandyheth.bsky.social
Real pleasure to be invited to speak at the British Pteridological Society meeting today.
Brilliant mix of talks spanning evolution, conservation and botanical collections.
And always great to have a tour of the wonderful @thebotanics.bsky.social collections! 🌿
October 25, 2025 at 3:19 PM
Reposted by Alexis Rastier 🌿
bingcailiu.bsky.social
Excited to share our research on the evolution of fossil forests from the Devonian to Jurassic! By analyzing 38 global fossil forests, we explored key parameters to better understand how these fossil forests developed over time.

doi.org/10.1016/j.ea...
October 12, 2025 at 1:16 PM
Reposted by Alexis Rastier 🌿
botsocamerica.bsky.social
🌵Deadline alert! #Botany2026 Symposia & Colloquia Proposals are due October 16. Help shape the scientific program for our Tucson meeting, themed Biodiversity at the Boundaries!

Submit your proposal and get details here: mailchi.mp/botany.org/b...

or here: www.botanyconference.org

#iamabotanist
October 2, 2025 at 8:33 PM
Reposted by Alexis Rastier 🌿
newphyt.bsky.social
✨ Paper spotlight ✨

(🧵 1/6) Leaf evolution: integrating phylogenetics, developmental dynamics, and genetic insights across land plants
nph.onlinelibrary.wiley.com/doi/10.1111/...
Fig. 2 Plant diversification and leaf evolution in the context of the fossil record of land plants.
October 1, 2025 at 10:01 AM
Reposted by Alexis Rastier 🌿
aldpaleo.bsky.social
And some of the fossils have arrived in Montpellier just in time for #FossilFriday 🎉
Most of them are stems with their tissues and cells preserved in 3D. They will be prepared as thin-sections & observed under the microscope to find out what plants they belonged to 🌿⛏️🔬 #paleobotany
Fossil plants still wrapped in newspaper and bubble wrap Small fossil stem on a rock
September 19, 2025 at 3:41 PM
Reposted by Alexis Rastier 🌿
paleobyliam.bsky.social
This approximately 15m-long fossil tree trunk from the Angeac-Charente bonebed of Early Cretaceous France is insane.
#paleontology #paleobotany #botany
September 21, 2025 at 11:51 PM
alexisrastier.bsky.social
In May and Jully 2025, I presented some new results from my PhD dedicated to the Latest Famennian flora of Euramerica🌿 in the Swedish Museum of Natural history and at Agora Paleobotanica in Paris. At Agora, I was awarded the Boureau Prize for the best oral presentation. 😄🏆 #Paleobotany #Devonian
September 2, 2025 at 7:22 AM
Reposted by Alexis Rastier 🌿
bsbicymru.bsky.social
Fossil swamp-forest plants at Brymbo, Wrexham - where 300 million years ago giant lycopods (clubmosses) like Lepidodendron towered to over 120ft tall with massive horsetails like Calamites! Amazing to be able to see these at Stori Brymbo.
August 4, 2025 at 7:45 PM
Reposted by Alexis Rastier 🌿
aldpaleo.bsky.social
Today's fossil is a very tiny branching stem with preserved tissues - check the scale bar! 🌿⛏️🔬 It belonged to a lycopsid (= a clubmoss) that grew in what is now southern France during the early Carboniferous, about 350 million years ago #paleobotany #FossilFriday
Ref: doi.org/10.1016/0034...
Thin section in the branching stem of a fossil lycopsid showing the tissues. A photo of the surface of the specimen showing the branching is in the corner
August 8, 2025 at 9:15 AM
Reposted by Alexis Rastier 🌿
aldpaleo.bsky.social
Happy #FossilFriday and #FernFriday ! This beautiful fossil leaf belongs to a #fern that was growing in what is now southern France during the late Carboniferous, about 300 million years ago 🌿⛏️
#paleobotany #fossil #botany
A fossil fern leaf on a rock
August 1, 2025 at 10:00 PM
Reposted by Alexis Rastier 🌿
aldpaleo.bsky.social
Fieldtrip day 1: today we visited not 1 but 2 sites with fossil plants 🌿⛏️🤩 Here's a nice Stigmaria, the rooting structure of a lycopsid tree from the latest Carboniferous, a little over 300 million year ago. (and yes it is extremely warm 🌡️)
Large Stigmaria, it's a big axis bearing roots, some visible on the side and some just as scars on the axis
June 28, 2025 at 4:47 PM
Reposted by Alexis Rastier 🌿
brandy-syglass.bsky.social
Finally plants for #3DThursday!🌽 A maize root tip, imaged using #microCT, from the Topp Roots Lab.

🔬: @zeiss-microscopy.bsky.social Versa 520 XRM
🥼: Keith Duncan @cygnusplantxray.bsky.social
🏛️: Danforth Center @danforthcenter.bsky.social
📝: academic.oup.com/plphys/artic...
🎬: syGlass.io #syGlass
June 26, 2025 at 4:17 PM
Reposted by Alexis Rastier 🌿
aldpaleo.bsky.social
This one is a section in a Sphenophyllum stem with 3d preserved tissues. It's from the same area (Hérault department) but early Carboniferous in age so about 50 million years older 🌿⛏️
Open access reference: doi.org/10.5252/geod...
2/3 #paleobotany
Section in a fossil stem with preserved tissues. The stem is only about 2mm in diameter. The outer part of the stem forms 8 lobes, the vascular tissues in the center form a triangle
June 13, 2025 at 7:09 PM
Reposted by Alexis Rastier 🌿
aldpaleo.bsky.social
Attention, la deadline approche ! #paleobotany #paleontology #geosciences 🌲🍄🐝🐟🦖⛏️
June 19, 2025 at 1:30 PM