Rémi Lefebvre's Avatar

Rémi Lefebvre

@rl-evobio.bsky.social

MSCA/UKRI Postdoctoral Fellow at the Royal Veterinary College, UK. I'm interested in evolutionary (paleo)biology, especially working on sauropodomorphs

96 Followers  |  100 Following  |  10 Posts  |  Joined: 07.01.2025
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Posts by Rémi Lefebvre (@rl-evobio.bsky.social)

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At the RVC we are grieving the death of the Structure & Motion Lab's creator, and stalwart comrade, Professor Alan Wilson FRS, from a plane crash in Namibia on Wednesday. He was a giant in comparative biomechanics and an amazing scientist. I'm still reeling. It is utterly shocking and deeply sad.

06.03.2026 13:54 — 👍 50    🔁 12    💬 9    📌 6
An historic black and white illustration of a paper nautilus floating on the ocean. There are boats, a city and hills in the background.

An historic black and white illustration of a paper nautilus floating on the ocean. There are boats, a city and hills in the background.

🎉 Huge news for BHL: The Field Museum is taking over the hosting of BHL’s website, servers & infrastructure, ensuring long-term stability and access for its 63+ million pages of open biodiversity literature. Learn more:
blog.biodiversitylibrary.org/2026/02/tran...
#BHLTransition #ILoveBHL 🌍 📚 🧪

27.02.2026 14:31 — 👍 344    🔁 137    💬 8    📌 25
Une nouvelle espèce nommée en hommage à Charles Aznavour | Jurassica Museum Une équipe de chercheurs de JURASSICA (Porrentruy, Suisse) annonce la découverte d’une nouvelle espèce de daman fossile en Arménie. Cette trouvaille exceptionnelle a été rendue possible grâce à une collaboration sur le terrain avec l’Institut des Sciences Géologiques de l’Académie nationale des sciences d’Arménie. Elle permet de mieux comprendre à quoi ressemblait ce mammifère énigmatique il y a plus de 3 millions d’années, et comment certains mammifères ont voyagé entre l’Afrique et l’Eurasie au cours de l’histoire. Cette nouvelle espèce a été baptisée Armenohyrax aznavouriani en hommage au chanteur et ambassadeur d’origine arménienne Charles Aznavour, symbole du lien culturel entre l’Arménie, la francophonie et la Suisse, où il a vécu. Ce choix souligne également l’esprit de coopération internationale à l’origine de la découverte.

Un nouvel hyrax dans le Pliocène d'Arménie découverts par des collègues du Jurassica 👏

www.jurassica.ch/fr/Infos-pra...

26.02.2026 10:06 — 👍 4    🔁 1    💬 0    📌 1
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A new genus and species of Pliohyracidae (Hyracoidea, Mammalia) from the Pliocene of Jradzor, Armenia Hyracoidea is a group of afrotheres that is today represented by three extant genera, but its fossil diversity is much greater. While most recent palaeontological studies have focused on documenting t...

Welcome Armenohyrax aznavouriani! Thrilled that our latest study is out sjp.pensoft.net/article/1813... We described this new species & did the first phylogenetic analysis of pliohyracids! Thanks to my co-authors who gave me the opportunity to work on this exciting study when I was at JURASSICA!

26.02.2026 13:41 — 👍 1    🔁 2    💬 0    📌 0

🦕I am extremely grateful to my colleagues and The Jurassic Foundation for making this project possible, which has marked a milestone in our knowledge of European titanosaurs and which we are convinced is on its way to becoming a reference work in the field.

21.02.2026 19:43 — 👍 13    🔁 6    💬 0    📌 0
JOB ALERT!

Lecturer in Biological Sciences

Come and join us in the world class Life Sciences Building at the University of Bristol!

Closing date: Sunday 8 March

JOB ALERT! Lecturer in Biological Sciences Come and join us in the world class Life Sciences Building at the University of Bristol! Closing date: Sunday 8 March

JOB ALERT!

Lecturer in Biological Sciences

Interested in our research areas? Click the link in our bio to discover more!

Closing date: Sunday 8 March

JOB ALERT! Lecturer in Biological Sciences Interested in our research areas? Click the link in our bio to discover more! Closing date: Sunday 8 March

JOB ALERT!

We are excited to announce that we are recruiting three new academics at lecturer level!

Click the link below for more info on how to apply, and don’t forget to explore our research themes too!

We look forward to receiving your applications!

www.bristol.ac.uk/jobs/find/de...

12.02.2026 09:13 — 👍 54    🔁 74    💬 0    📌 7
A book on a cushion held open with a weighted rope, with handwriting on the right hand page.

A book on a cushion held open with a weighted rope, with handwriting on the right hand page.

Happy bday Charles Darwin (born #OTD 1809)! 🎉 Check out Charles Darwin’s Library on #BHLib, a virtual reconstruction of the surviving books owned by Darwin, drawing on original copies & surrogates, providing full transcriptions of his annotations & marks: www.biodiversitylibrary.org/collection/d...

12.02.2026 06:01 — 👍 21    🔁 6    💬 0    📌 0
Collection Scientist and Curator (m/f/d) A13/14 100% - Eberhard Karls Universität Tübingen - job portal | jobs.myScience

🚨Job alert🚨
Curator in the Zoological Collections in Tübingen, Germany
www.myscience.ch/jobs/id69219...

11.02.2026 11:53 — 👍 0    🔁 3    💬 0    📌 0
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Job Opportunity at the RVC: Lecturer / Senior Lecturer in Biomedical Sciences We have an exciting opening for up to two academics at Lecturer or Senior Lecturer level to join the Department of Comparative Biomedical Sciences at our Camden campus.  The posts are suitable for res...

2 RVC faculty jobs are advertised now!
Lecturer / Senior Lecturer in Biomedical Sciences
Comparative Biomedical Sciences Department
Location: Camden (King's Cross, London)
Very broad search in the CBS department's remit
jobs.rvc.ac.uk/Vacancy.aspx...
EDI-friendly

10.02.2026 11:36 — 👍 0    🔁 6    💬 0    📌 0
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Habitat and complex life cycles promote morphological diversity in salamander limb bones We examined the external shape and cross-sectional morphology of limb bones in 133 salamander species spanning the ecological and phylogenetic breadth of Caudata. We find that adaptations for aquatic...

Second PhD paper is out! We find: 1) aquatic and terrestrial salamanders have different limb bone adaptations, 2) complex life cycles promote different traits, 3) decoupling of external and internal bone traits increase diversity.

Thread (1/8) and FREE link below! 🦎🧪

doi.org/10.1111/joa....

28.01.2026 20:28 — 👍 87    🔁 39    💬 4    📌 1
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a close up of a green and white sponge with purple spots Alt: A green and white sea sheep grazes on a green lawn of algae on a surface underwater.

This is the "SEA SHEEP" (Costasiella kuroshimae) & it took the old axiom: "you are what you eat" VERY literally.

It eats algae & rather than just digest them, it harvests the chloroplasts & becomes PHOTOSYNTHETIC. Solar slug!

Also, some of its cousins can rip their own heads off.

27.12.2025 17:02 — 👍 712    🔁 235    💬 14    📌 36
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Time to publish responsibly: DAFNEE, a database of academia-friendly journals in ecology and evolutionary biology Abstract. The current economics of scientific publishing reveal a profound imbalance: academia pays prices far exceeding the actual costs of publication. R

DAFNEE, a useful database of academic-friendly journals in #Ecology and Evolutionary #Biology

academic.oup.com/jeb/advance-...

02.12.2025 07:06 — 👍 29    🔁 20    💬 0    📌 0
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Help Give BHL Wings This Giving Tuesday On 1 January 2026, the Biodiversity Heritage Library (BHL) will take flight, becoming fully independent after nearly two decades hosted by the Smithsonian Institution. This transition marks an hist…

On 1 January 2026, the Biodiversity Heritage Library will take flight, becoming fully independent after nearly two decades hosted by the Smithsonian Institution. Learn more on the #BHLBlog: blog.biodiversitylibrary.org/2025/12/give... #GiveBHLWings #BHLTransition #GivingTuesday

02.12.2025 14:24 — 👍 10    🔁 9    💬 0    📌 0

Please consider supporting Biodiveristy Heritage Library, which preserves so many key historical publications you can't find anywhere else online!

01.12.2025 06:06 — 👍 13    🔁 5    💬 0    📌 0
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Hindlimb functional morphology and locomotor biomechanics of the small Late Triassic pseudosuchian reptile Gracilisuchus stipanicicorum (Archosauria: Gracilisuchidae) A three-dimensional biomechanical model of the musculoskeletal system is used to analyse the potential locomotor functions of the small (~1 kg) Late Triassic archosaurian reptile Gracilisuchus stipan...

#DAWNDINOS paper! We built a 3D musculoskeletal model of ~1 kg Triassic pseudosuchian archosaur Gracilisuchus. Forelimbs were a challenge. Nice articulations of ribs, vertebrae & osteoderms made a good torso & neck. Probably quadrupedal, plantigrade & not fully erect limbs. doi.org/10.1111/joa....

20.11.2025 09:33 — 👍 18    🔁 7    💬 1    📌 0
Philippe Taquet, paléontologue français

Philippe Taquet, paléontologue français

⚠️ Sad news for science: Philippe Taquet, the gentleman of French paleontology, passed away on Sunday, November 16.
@cr2p.bsky.social @mnhn.fr @recherche.mnhn.fr @academiesciences.bsky.social

17.11.2025 12:36 — 👍 9    🔁 3    💬 1    📌 2
Le beurre, l’argent du beurre et le c*l des chercheurs- La chronique de Tania Louis dans La dernière
YouTube video by Radio Nova Le beurre, l’argent du beurre et le c*l des chercheurs- La chronique de Tania Louis dans La dernière

De mon côté on m'a confié le micro pour la chronique sciences.

Cette fois j'ai décidé de parler du fonctionnement scandaleux de l'édition scientifique, peu connu en dehors des labos : www.youtube.com/watch?v=Yg2C...

Mais 4 minutes c'est court, alors j'ajoute quelques ressources ci-dessous !

12.11.2025 18:36 — 👍 56    🔁 22    💬 2    📌 2
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Philippe Taquet, chasseur de dinosaures et ancien directeur du Muséum national d’histoire naturelle, est mort Destiné à reprendre l’industrie textile familiale, cet esprit libre a préféré la vie de chercheur d’os, découvrant plusieurs espèces d’animaux disparus, tout en menant une carrière institutionnelle de premier plan. Il s’est éteint le 16 novembre, à 85 ans.

Philippe Taquet, chasseur de dinosaures et ancien directeur du Muséum national d’histoire naturelle, est mort

17.11.2025 10:55 — 👍 29    🔁 21    💬 1    📌 12

RDV à 16H pour écouter @houssayecnrs.bsky.social de @mecadev.bsky.social et Guillaume Lecointre de l'@isyeb.mnhn.fr sur la paléo-bioinspiration

06.11.2025 12:59 — 👍 4    🔁 4    💬 0    📌 0
Easier said than done: unexpected hurdles to preparing ∼1,000 cranial CT scans for data collection from an online digital repository Background As science becomes more open and accessible, researchers are increasingly encouraged—and sometimes required—to share their digital data on public repositories. While this promotes transpare...

Analysis of 985(!!) baboon skulls' CT scan data from MorphoSource shows that >18% have slice spacing errors that propagate to downstream analyses-- an important cautionary tale on checking CT metadata vs. errors, and a goliath effort: peerj.com/articles/201...

27.10.2025 07:40 — 👍 27    🔁 11    💬 0    📌 4
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Biomechanical simulations of hindlimb function in Alligator provide insights into postural shifts and body size evolution Locomotor simulations in alligators reveal that transitions to erect limb postures facilitate the evolution of larger body sizes.

New paper on crocodylian locomotor evolution led by Masaya Iijima, w/Richard Blob & me!
More erect hindlimb postures help extant gators support their weight (esp. at ankle), & how these mechanics constrained giant Deinosuchus to a slow walk at best!
The paper-- www.science.org/doi/10.1126/...

22.10.2025 18:40 — 👍 53    🔁 18    💬 3    📌 1

New bird paper led by the brilliant and talented Andrew Orkney! 🐣
We show that greater parental care is linked to greater evolutionary flexibility in how birds fly 🦅

09.10.2025 12:35 — 👍 9    🔁 3    💬 0    📌 0
A drawing of Protobalanus spinicoronatus, a flat oval-shaped mollusk with no distinct head and armored plates and also spikes on the body's edge.

A drawing of Protobalanus spinicoronatus, a flat oval-shaped mollusk with no distinct head and armored plates and also spikes on the body's edge.

A fossil 3D-scan of Protobalanus spinicoronatus, showing the oval-shaped body of the mollusk with armored plates and also a few spikes on the body's edge.

A fossil 3D-scan of Protobalanus spinicoronatus, showing the oval-shaped body of the mollusk with armored plates and also a few spikes on the body's edge.

#paleoctober2025 day 9 : Protobalanus spinicoronatus !

Despite its name, this animal is a devonian mollusk, more specifically a basal polyplacophoran. You may know its current day relatives as little criters on the beaches called "chitons" (that are not slugs with shells nor crustaceans).

09.10.2025 09:42 — 👍 26    🔁 10    💬 0    📌 0
Estimating ankle joint angle from skeletal geometry: a mechanical model of the calcaneal lever in terrestrial mammals Background The ankle joint angle, typically measured between the tibia and metatarsus, shows only a small range of movement during the stance phase and remains relatively constant within species, but ...

To a certain amount, you can estimate the angle of the ankle joint (mean angle during stance phase) of some land mammals by measuring the angle of their tibial long axis vs. calcaneal tuber long axis, and that could be handy:
peerj.com/articles/200...

29.09.2025 15:39 — 👍 8    🔁 6    💬 0    📌 0
42/2025 Research Associate with the goal of a doctorate (f/m/d)

PhD position available at the Museum für Naturkunde in Berlin on avialan ontogeny (birds and their closest non-avian dinosaur relatives)!

jobs.museumfuernaturkunde.berlin/jobposting/e...

30.09.2025 09:11 — 👍 21    🔁 24    💬 1    📌 0
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Hello, microanatomy &/or salamander enthusiasts!

If you’re a first-year master’s student, I might have an exciting internship for you on the microanatomy of two salamanders sp., with already great results on the humerus.

What: Zeugopod microanatomy
Where: SMNS

Contact: morgan.proust@smns-bw.de

26.09.2025 15:16 — 👍 3    🔁 5    💬 0    📌 0
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New paper led by @es-ucl.bsky.social PhD student Samantha Beeston (with @profpaulbarrett.bsky.social + others) on the evolution of postcranial pneumaticity in early sauropodomorph dinosaurs + its likely independent acquisition from that of theropods & pterosauromorphs: doi.org/10.1111/joa....

26.09.2025 08:40 — 👍 13    🔁 8    💬 0    📌 0
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I get that the news cycle is packed right now, but I just heard from a colleague at the Smithsonian that this is fully a GIANT SQUID BEING EATEN BY A SPERM WHALE and it’s possibly the first ever confirmed video according to a friend at NOAA

10 YEAR OLD ME IS LOSING HER MIND (a thread 🧵)

24.09.2025 20:30 — 👍 29693    🔁 9979    💬 727    📌 1546
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"After the fall of the Roman Empire, elephants virtually disappeared from Western Europe. Since there was no real knowledge of how the animal looked, illustrators had to rely on oral and written transmissions to morphologically reconstruct the elephant" www.uliwestphal.de/elephas-anth...

24.09.2025 07:00 — 👍 166    🔁 59    💬 6    📌 11
Apply - Interfolio {{$ctrl.$state.data.pageTitle}} - Apply - Interfolio

JOBS JOBS JOBS! Stony Brook are advertising two assistant professorships in vertebrate palaeo/evolution, one focused on (in the words of the SVP programme) NOT DINOSAURS and the other on evolutionary neurology:
apply.interfolio.com/172502
apply.interfolio.com/172517

18.09.2025 07:06 — 👍 19    🔁 22    💬 0    📌 0