A nice way to end the week - my latest paper with @konowlab.bsky.social is out in early access! What's behind bite force in rodents? They can change muscle anatomy, mechanics, *and* molecular composition to make more force www.nature.com/articles/s42...

Join us for our first CNB virtual mini symposium 🐓🏃🏻‍♀️! future events suited to additional time zones coming soon; join our mailing list on our website (link in flyer) to stay in the loop.

A novel approach to quantifying mammal locomotor repertoires using scoring and cluster analysis Abstract. Describing behaviour using qualitative categories is a staple of studies on tetrapod functional morphology, ecology and evolution. However, such

New paper out! The first from @osteosophia.bsky.social 's PhD - a new (hopefully more objective) way for categorising locomotor repertoires. With @eloygl.bsky.social @livevobiomech.bsky.social and Laura Fitton: royalsocietypublishing.org/rspb/article...

Early vertebrate biomineralization and eye structure determined by synchrotron X-ray analyses of Silurian jawless fish Abstract. Understanding the origin and early diversification of vertebrates has always been a challenge because of the ambiguous and conflicting interpreta

Here is a link to our new publication on the origins of vertebrates. "Early vertebrate biomineralization and eye structure determined by synchrotron X-ray analyses of Silurian jawless fish" url: royalsocietypublishing.org/rspb/article...

Postcard advertising the JEB Travelling Fellowships. The Company of Biologists logo is in the top left corner. The top right corner shows a photo of an an ECR standing in water bending over black dustbins used to collect aquatic animals. In a teal-colour band across the centre of the postcard is the message, 'Are you an early-career researcher planning to do a collaborative visit to another lab?'. The answer to that question is in the bottom left corner, stating, 'You could be eligible for funding from us'. A statement in a teal-colour box in the bottom right corner states 'Find out more'.

Calling all JEB ECRs! It's that time again! The deadline for the next JEB Travelling Fellowship applications is 6 February, so if you've got a burning desire to travel to another lab to answer an extraordinary question get your application ready now!

www.biologists.com/grants/trave...

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....

We are hiring a POSTDOC on an NIH award to measure inertial effects of (in)active muscle. Please share and re-post widely! Please send expressions of interest to my UML email.

Rat superficial masseter operates at long lengths during biting Scientific Reports - Rat superficial masseter operates at long lengths during biting

New paper (with @konowlab.bsky.social)! Muscle force varies with length, but how does this affect muscle function in life?

Combining live animal and muscle prep data, we found rat jaw muscles routinely operate at long, forceful (potentially unstable) lengths. rdcu.be/eNIQk

ecoevojobs.net 2025-26

The 2025-26 Eco-Evo job list is out. Good luck to those applying!

docs.google.com/spreadsheets...

Great new paper just dropped! A really comprehensive look at how mammals and their ancestors moved from sprawling to upright stances... but not in the straightforward way you might think! Congratulations to all the authors! 🎉

My coauthor, Mags Mercado, is a very talented artist (and scientist!) 🎨🔬

Head over heels: How mammals stood up and took over the world For more than a century, scientists have puzzled over a fundamental mystery in our evolutionary history: how did mammals go from sprawling like lizards to striding like cats and dogs?…

This work would not be possible without a long list of collaborators, collection staff and colleagues. Extremely grateful to my coauthors (including a former student who made vital contributions).

You can see a lovely write-up of the paper here news.harvard.edu/gazette/stor...

An artistic rendering of the theoretical "adaptive landscape" of posture evolution in mammals. Different taxa occupy distinct adaptive peaks associated with different postures (green - yellow = sprawling, orange = upright). Image credit to Magdalen Mercado.

Contrary to older ideas that posture evolved in a stepwise manner, we found that the ancestors of mammals navigated a complex evolutionary adaptive landscape, evolving, radiating and diversifying in their own unique ways.

A phylogeny of living and extinct tetrapods, showing the inferred evolution of forelimb posture in reptiles, salamanders, and mammals and their ancestors (green to yellow = sprawling, orange = upright). Illustrated with representative humeri (upper arm bones) from the study. Full figure and caption in the paper https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.3003188

We compiled a huge dataset of limb bones from living and extinct animals (>200 species) and analysed what they look like, how they functioned and how this all changed through 300 million years of evolutionary time.

Adaptive landscapes unveil the complex evolutionary path from sprawling to upright forelimb function and posture in mammals The ‘sprawling-to-parasagittal’ postural transition is a key part of mammalian evolution from non-mammalian synapsids. This study uses evolutionary adaptive landscapes to reveal parasagittal postures ...

I'm so excited to share my latest paper out now! How did the ancestors of mammals make the switch from sprawling to upright, taking over the world in the process? Spoiler alert; it's complicated! journals.plos.org/plosbiology/...

Left: Phylogeny of tetrapods showing the evolution of posture from sprawling (green, yellow) to upright or parasagittal (orange), illustrated with humeri of select living and fossil species to show changes in morphology over time. Image credit Robert Brocklehurst. Right: The adaptive landscape of posture evolution in mammals and their ancestors. Living and fossil species with sprawling vs upright postures occupy different adaptive peaks. Image credit Magdalen Mercado.

How did our mammalian #posture arise from our sprawling #synapsid ancestors? @docrobbrock.bsky.social &co reveal #parasagittal postures in stem therians, implying that synapsids evolved & radiated with distinct forelimb trait combinations for most of their history @plosbiology.org 🧪 plos.io/4loAHoy

Oh look! Me and @nhcooper123.bsky.social have done a podcast!

For each episode we scour the @nhm-london.bsky.social's collections for weird and fun specimens that fit the theme, and then ramble to each other about them.

So if that's your bag, give it a listen! 🎉

Relationship between joint shape and function as revealed through ex vivo XROMM Summary: Experimental data measuring mobility across different types of limb joints in a mammal (opossum) and a reptile (tegu lizard) raise further questions on how well articular morphology predicts ...

New publication day! 🥳 Read all about arm joints in mammals and lizards - what they look like and how they move - with me, @l-fahn-lai.bsky.social and our co-authors. Out today in @jexpbiol.bsky.social

journals.biologists.com/jeb/article-...

A white woman with dark blonde hair and glasses leans over a large piece of rock with black fossils embedded in the surface.

Announcing The first found, and most complete, #dinosaur skeleton from the Middle #Jurassic of Scotland! 📢🦖 So delighted to finally be able to share this great new fossil, published today! It was actually the first dinosaur found in #Scotland... thread 🧵 #OpenAccess #fossils doi.org/10.1017/S175...

Colourful digital illustration of a misty lagoon landscape in evening sun, during the middle Jurassic period. In the middle ground, there is a smallish ornithischian dinosaur standing in shallow water and lookind around. The dinosaur is purplish grey with green and creamy white patterns. On the foreground, there are rocks covered in mosses, ferns and fungi, with a small lizard hiding among the vegetation. On a tree branch above, a small mammal (Krusatodon) yawns. The background has more mossy rocks and gnarly trees partially obscured by mist, as well as a turtle and a salamander.

The Elgol Dinosaur is out!

This is the first and most complete dinosaur skeleton from the Jurassic of Isle of Skye, Scotland. I got to work with the amazing @elsa-panciroli.bsky.social on bringing this early ornithischian back to life. #Sciart

Link to paper: www.cambridge.org/core/journal...

BFEX: A Toolbox for Finite Element Analysis With Fossils and Blender We introduce BFEX, a Blender add-on for building Finite Elements Analysis for Fossils software. This approach streamlines the process of creating and visualizing FE models.

Just out of the oven! Today @migueldlm.bsky.social just published his first paper related to his PhD thesis! BFEX is a new Blender tool for making FEA more accessible for biologists and paleontologists! All using open and free software 😱

onlinelibrary.wiley.com/doi/10.1002/...

New research led by Spencer Hellert tests the idea that major radiations within synapsids are begun by small faunivores.

Paper: www.nature.com/articles/s41...
Press release: www.eurekalert.org/news-release...

Exciting pair of muscle evolution companion papers just out! Bishop & Pierce describe the fossil record of appendicular muscle evolution in Synapsida on the line to mammals in forelimb & hindlimb
anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...