Alexis Rastier 🌿
@alexisrastier.bsky.social
170 followers 52 following 8 posts
PhD student in Devonian paleobotany @UniversiteLiege, Research assistant in Triassic paleobotany at the Swedish Museum of Natural History🌱🌲🌺🌿🌍
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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
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.
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
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
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
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.
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
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
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
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
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
Reposted by Alexis Rastier 🌿
aldpaleo.bsky.social
Attention, la deadline approche ! #paleobotany #paleontology #geosciences 🌲🍄🐝🐟🦖⛏️
Reposted by Alexis Rastier 🌿
palaeojules.bsky.social
Prep for Lyme Regis Fossil Festival is almost finished!!!
All I have left are a few prints to print, stickers to cut, and a workshop intro spiel to fine-tune! Hope to see y'all there next weekend!!!
#paleobotany #paleontology #paleoart #fossilfestival #stickers #merch #dinosaurs #plants
Some prints of extinct plants on black backdrops More prints of plants on black backdrops, ontop of a printer which has just printed one out. Trans anchiornis badges in little plastic bags A collection of pride dinosaur and Ginkgo leaf stickers in blastic baggies
alexisrastier.bsky.social
#Botany Enjoy some lovely ferns lato sensu and lycophytes found within the lovely spruce forest of Tyresta national park (Sweden).
Reposted by Alexis Rastier 🌿
fernway.bsky.social
Shameless self-promotion continues...🙃 You might find this #fern book in your local bookstores! mailchi.mp/btiscience/f...
Reposted by Alexis Rastier 🌿
fossilsinthills.bsky.social
Heading out to a park this #FossilFriday?

Be sure to visit Horton Park in Bradford, where you can see one of three huge fossil trees!

These Carboniferous giants were excavated from Clayton in the late 19th Century and placed on public display to "inspire future generations of geologists".
Reposted by Alexis Rastier 🌿
aldpaleo.bsky.social
For this #FossilFriday a question for paleobotanists and people interested in #paleobotany 🌿⛏️: what are the groups of fossil plants and/or the big events in plant evolution that you would like to read a new review paper about?
#botany #fossil #plant #evolution
Pieces of rock with fossil fern foliage
Reposted by Alexis Rastier 🌿
aldpaleo.bsky.social
Happy #FossilFriday and #FernFriday 🌿⛏️
The fossil is a piece of Pecopteris foliage (Marattiales) from the late Carboniferous of France, a little over 300 million year old. Extant fern: Dryopteris filix-mas (Polypodiales).
#paleobotany #fossil #botany
Someone's hand holding a piece of rock with fossil fern foliage on it in front of a living fern
Reposted by Alexis Rastier 🌿
aldpaleo.bsky.social
Our paper is now published🌲⛏️🇦🇶
#paleobotany #fossil #botany
Sections of fossil wood showing small rings
Reposted by Alexis Rastier 🌿
brgm.fr
BRGM @brgm.fr · Apr 22
Aujourd’hui, c’est la journée de la Terre

Celle qui nous nourrit et nous fournit tant de choses que l’on ne soupçonne parfois même pas.

Comme les métaux de nos téléphones, l’argile dans les cosmétiques, le gypse pour le plâtre, le verre, le zinc… Ou l’eau tout simplement !
Reposted by Alexis Rastier 🌿
aldpaleo.bsky.social
Don't sneeze! These are spores of a 360 million year old lycopsid 🌿⛏️🔬
Today lycopsids (clubmosses) are small plants & relatively rare but in the Paleozoic some species formed large trees. The spores here have been fossilized still attached in groups of 4 (tetrads)
Happy #FossilFriday! #paleobotany
Fossil spores seen under the microscope
Reposted by Alexis Rastier 🌿
Reposted by Alexis Rastier 🌿
aldpaleo.bsky.social
If you are a paleobotanist or botanist interested in doing a postdoc on fossil plants with me in Montpellier, I'm happy to help prepare a proposal for this year's #MSCA Postdoc Fellowship call (deadline Sept. 10).
marie-sklodowska-curie-actions.ec.europa.eu/actions/post...
1/3 #paleobotany #botany
Postdoctoral Fellowships
The information provided on this page is a summary of the main rules and requirements for Postdoctoral Fellowships (PFs) and who can apply for them.
marie-sklodowska-curie-actions.ec.europa.eu
Reposted by Alexis Rastier 🌿
aldpaleo.bsky.social
I'm at the Museo di Scienze Naturali dell'Alto Adige/Naturmuseum Südtirol for a few days to look at some cool fossil plants 🌿⛏️ And practice my (equally) catastrophic German & Italian *at the same time* 🙊 #paleobotany
(photos from the public exhibit)
Fosdil branch of a conifer from the Wengen Formation, Prags/Braies, middle Triassic, 238 million years ago Fossil trunk of a conifer in porphyry tuff from Sinichbach/Rio Sinigo (Permian)