James Hammond

Really excited to present the results of a fantastic collaboration with Jesse Veenvliet @jesseveenvliet.bsky.social @mpi-cbg.de @poldresden.bsky.social 🤩

We find a unique mechanism for body axis elongation in mammals, different from other vertebrate species

➡️ www.biorxiv.org/content/10.1...

According to blaadmineerders.nl P xenia feeds on Aspen

Could these mines not be microtheriella? Looks like the correct shape, and there's multiple mines on the same leaf, which is common for microtheriella

Mine of Dialectica scalariella on Viper's Bugloss (Echium vulgare)

Larva of Dialectica scalariella, exposed from its mine

Adult Dialectica scalariella

Collected leaf-mines of Dialectica scalariella on Viper's Bugloss/Echium vulgare from Freshwater Bay, Portland (VC 9) on 13th Sept - adults emerged on 25th Sept

@portlandbirdobs.bsky.social @dorsetbutterflies.bsky.social

I am excited to share the first preprint from my postdoc work! We found that ligand-receptor pairs are not static and show an antagonistic spatial localization! We show ligand is important to fine tune the amplitude of Wnt oscillations ensuring robust tissue patterning! Check out the preprint!

Out now in Seminars in Cell & Dev Biol!

doi.org/10.1016/j.se...

With thanks to co-authors @callumbucklow.bsky.social and @bertaverd.bsky.social

Developmental bias explains the evolutionary trend towards simple leaf shapes The relative influence of developmental bias and natural selection on evolutionary outcomes remains a central, unresolved question in evolutionary biology. Here, we combine large-scale phylogenetic tr...

🧪🚨Ever wondered why plant leaves 🍃look the way they do? Glad to contribute to work by Jamie Malone & team on developmental bias toward simple leaves! But there’s a backstory to it 1/4
www.biorxiv.org/content/10.1...

Portland moth / Actebia praecox resting on sand

Arctosa perita on an egg tray

Haar kept moth numbers down at Findhorn dunes (VC 95) last night, with a meagre return of 15 species across two traps. However i did find a nice Portland moth / Actebia praecox resting on the heather, and an attractive Arctosa perita sought refuge (or prey) inside one of the traps

Can't be taken beyond genus but most likely to be cagnagella with those white terminal cilia

Nemapogon ruricolella, resting on my finger

Argyresthia glaucinella

Stephensia brunnichella

Great night mothing in Wytham Woods on midsummer's day - warm weather brought in 121 species including (presumed) Nemapogon ruricolella, Argyresthia glaucinella, and a very handsome Stephensia brunnichella

@tmbirding.bsky.social #mothsmatter

The 2024 Embryology cohort. Top row (left to right): Lucrezia Ferme, Vivek Ramalingam, Louise Dagher. Second row (left to right): Yuchuan Miao, Angelo Arrigo, Cliff Rostomily, Ekasit Sonpho, James Hammond, Jakke Neiro, Fjodor Merkuri, Paul Maier. Third row (left to right): Tatjana Piotrowski, Marc Trani Bustos, Roy Chen, Amanda Powell, Maya Pahima, Verena Kaul, Alexandra Lion, Frederic Zimmer, Kaitlyn Abshire, Stanley Marjenberg. Bottom row (left to right): Athula Wikramanayake, Kate McCluskey, Virgínia Andrade, Arushi Gupta, Francisca Espinoza Romero, Ruth Styfhals, Chaitra Prabhakar, Erica Lin.

In this Perspective, students from the 2024 Embryology Course share their experiences spending the summer at the Marine Biological Laboratory (@mblscience.bsky.social‬) in Woods Hole:
journals.biologists.com/dev/article/...

Images taken during the Woods Hole Embryology Course that have been promoted by Development and the Node.

The Company of Biologists and the Woods Hole Embryology Course

We explore the association of Development and @biologists.bsky.social‬ with the Woods Hole Embryology Course @mblscience.bsky.social‬ and hear from former students about the impact the course has had on them:
doi.org/10.1242/dev....

From hydra grafts to butterfly gene expression, the 2024 @mblscience.bsky.social #Embryology Course was a playground for #discovery. 🌊 @planaria1.bsky.social Lab postdoc Ekasit Sonpho co-authored a reflection in @dev-journal.bsky.social on what made this summer so transformative: bit.ly/3ZIMRQu

Embryology 2024: a summer like no other Each summer since 1893, a small group of scientists from around the world have convened at the Marine Biological Laboratory (MBL) in Woods Hole, Massachusetts, USA, to work on the most exciting model ...

What a fantastic essay by last year's @mblscience.bsky.social Embryology students! A perfect paean to the most wonderful science: "It's exhausting; it's exhilarating; it's Embryology."

journals.biologists.com/dev/article/...

Somitic Change Drives Changes in Vertebral Regionalisation in African Cichlids Despite Strong Canalisation of Somite Number https://www.biorxiv.org/content/10.1101/2025.05.23.655800v1

Experimental embryology postdoc available in my lab at the @biology.ox.ac.uk @ox.ac.uk working on the evolution of vertebral counts. Reach out if you’re passionate about EvoDevo, enjoy lab work and microscopy and are into or could get into cichlid fishes. Deadline on the 16th June. Please share!

African Cichlid Lake Radiations Recapitulate Riverine Axial Morphologies Through Repeated Exploration of Morphospace African cichlids comprise more than 1800 species of freshwater fishes, with remarkable adaptive radiations in Lakes Tanganyika, Malawi, and Victoria that have given rise to extraordinary morphological...

Excited to announce my second PhD manuscript is on bioRvix (biorxiv.org/content/10.1...). Thanks to all co-authors, including my supervisors @bertaverd.bsky.social and Roger Benson. Thread below...

Modularity of the segmentation clock and morphogenesis Vertebrates have evolved great diversity in the number of segments dividing the trunk body, however the developmental origin of the evolvability of this trait is poorly understood. The number of segme...

Segmentation clock & tissue development are decoupled - explanation for evolution of flexible body plans?
#EvoDevo #SegmentationClock

Study from Verd Lab @bertaverd.bsky.social @oxfordmathematics.bsky.social

🆕 #preprintpeerreview @biorxivpreprint.bsky.social

--> doi: doi.org/10.1101/2024...

I assume you reared them from larvae? What did you feed them - are you close enough to Bearberry to feed them that, or did you try them on Willow?

Not argyrana IMO, suspect one of albuginana/suspectana, worth dissecting

How'd you find this one? On a fencepost?

A male of the micro moth Pammene juniperana.

A female of the micro moth Pammene juniperana.

Habitat of the micro moth Pammene juniperana with wild Juniper growing on chalk downland.

Larval feeding signs of the micro moth Pammene juniperana, with green Juniper berries discoloured pale blue.

Previously only recorded once in the UK in 2018, records of Pammene juniperana have been increasing since 2022. Pleased to finally share this paper with @jamesehammond.bsky.social confirming that this lovely moth is breeding here, probably both on both wild and garden Junipers: shorturl.at/E2LrU

Thank you!

Thank you! Obviously heavily inspired by your work

Latest work:

Review on the evolvability of vertebral number, and the developmental processes underpinning it

Written by Callum Bucklow, @bertaverd.bsky.social, and myself

Check it out here: doi.org/10.32942/X2K...

Rannoch sprawler / Brachionycha nubeculosa

Rannoch sprawler / Brachionycha nubeculosa

Yellow horned / Achlya flavicornis

LepiLED drew in thirteen Rannoch sprawler (Brachionycha nubeculosa) at Drynachan up the Findhorn valley, including some nice dark specimens. Conditions about perfect, 90 moths of 11 species for 1.5 hrs trapping