Mathieu Preußner

Historical scientific illustration titled "Leonura terminalis" from "Monographie der Medusen" (1879-1881) depicting detailed anatomical views of a jellyfish species. The image includes a side view showing the bell-shaped body with textured tentacles, cross-sectional and top-down views revealing internal structures like radial canals, gonads, and muscle arrangements. Fine line work and pale red highlights emphasize key features. Labeled with scientific annotations, the drawing illustrates the jellyfish’s morphology and internal anatomy for deep-sea medusae study.

🎣 Monographie der Medusen
Jena: G. Fischer, 1879-1881.

[Source]

This thread below is criminally under-liked and under-shared!

Young #Drosophila researchers (PhDs, postdocs, and early-career Drosophilists): fill out the survey by Sept 1st to get matched with a mentor who can support you with your career.

Established Drosophilists, like/share Shefali's Thread ;)

Somites are a source of nephron progenitors in zebrafish - Nature Communications This study reveals that cells of the zebrafish kidney can originate from the somites, structures traditionally held as precursors to the skeletal muscle, challenging a century-old paradigm and prompti...

Intermediate mesoderm isn't the sole contributor to nephrons in zebrafish-new manuscript out showing somites are a source of nephron progenitors! Very cool, dogma challenging study led by Alan Davidson's group. Many fun discussions were had-grateful for the inclusion! www.nature.com/articles/s41...

first data from the new LLSM in PertzLab @olivierpertz.bsky.social! i always thought nuclei were spherical but they are pancakes???? so much more to see in 3d, but data volume produced is insane, we will have to rethink our analysis pipelines. tips welcome! here shown in @napari.org

The Galapagos Islands, where a sea lion hunts salema fish

Marine protected areas can protect fish and maintain healthy ecosystems. As demonstrated by two related papers in this issue, however, such areas are only effective against illegal fishing when established limitations are enforced.

Learn more this week in Science: scim.ag/3H6oeXQ

A confocal image of an E18.5 mouse lung showing Shh-expressing cells in green and non-expressing cells in magenta. Image was acquired on a Nikon A1R.

Happy #MicroscopyMonday! Here is another gorgeous lung image from a Shh lineage tracing survey by @stjuderesearch.bsky.social postdoc Christina Daly! This is an E18.5 🐭 lung with magenta showing non Shh-expressing cell types and membrane GFP marking Shh-expressing cells. 🤩 🧪 🔬 👩‍🔬

Illustration showing seven sequential silhouettes of a skate (a type of ray related to sharks) demonstrating its "flying" swimming motion. The drawings highlight the wing-like pectoral fins stretching backward and bending in smooth, fluid curves, resembling the wings of swift birds. The images depict the fins' rhythmic up-and-down movement as the skate propels itself through the water, emphasizing its specialized form. Captions note that this motion has inspired nicknames like "Sea Eagles" and "Sea Hawks" for some species. The page includes additional text about various shark and skate species and their morphological adaptations.

🦈 Shadows in the sea
Philadelphia, Chilton Books[1963]

[Source]

Drosophila testis or a fluorescent snail ? 🐌 🐚
I can’t tell the difference anymore🌀

Such an honor to be featured by @focalplane.bsky.social , especially on my favorite day of the week: #FluorescenceFriday! 🔬

Below for reference, a picture of the full hydei testis with the musculature stained (depth-coded) taken together with @saraheclark.bsky.social

#cellbio #devbio #microscopy

Featured image with Maik Bischoff - FocalPlane Featured image with Maik Bischoff - News

Our featured 🔬image this #FluorescenceFriday is of a portion of testis from Drosophila hydei, acquired by @maikbischoff.bsky.social.

Learn more about the image and Maik’s research ⤵️
focalplane.biologists.com/2025/07/18/f...

Shark embryos of four different developmental stages, growing outside of their eggcases 🦈 🧪

Igor Siwanowicz created these images of the underside of the front foot of a male diving beetle. You can see suction cups that are used during mating, as well as a broad plate and exterior spines that aid in swimming.

Description of journals published from the weblink

Last week I was privileged to join the Board of the Company of Biologists @biologists.bsky.social . They publish five journals across diverse fields of biology, including two of my favorites, @jcellsci.bsky.social & @dev-journal.bsky.social. 1/n
www.biologists.com

I'd love to see it 🤞😍

What a ride....really fascinating story 🎉 congrats

Schematics depicting the dorsal and ventral sides of fins and limbs

We take for granted that our hands have two sides and can articulate in an endless number of ways. But what about a fish’s fin? Can a fish know something “like the back of its fin,” or have its future told with a fin palm reading? Check out this bluetorial to find out 👇🧪🧬🐟 doi.org/10.1101/2025...

Agreed 💯

Lifelong single-cell profiling of cranial neural crest diversification in zebrafish - Nature Communications Cranial neural crest generates a wide diversity of cell types. Here the authors perform single-cell profiling of neural crest to identify key enhancers and transcription factors for cell fate competen...

Yes.... I think these are cells of the tunica media (part of the filamental arteries) according to @fabianlab.bsky.social work:

www.nature.com/articles/s41...

2/2
Also got a close-up where the expression pattern goes full-on pointillism

Among others, fgf10b is expressed in gill pillar cells, that structure the vascular network within the lamella.

1/2
🧬🎨 When gills do Pointillism!

For this #FluorescenceFriday,
here’s a dissected gill arch expressing nuclear fgf10b:nEOS — depth color-coded: blue for medial filaments, yellow for lateral ones.

#Zebrafish #DevBio #Microscopy #Gills

June in preprints - the Node Welcome to our monthly trawl for developmental and stem cell biology (and related) preprints. The preprints this month are hosted on bioRxiv and arXiv –

June in preprints 📃

We've trawled through the latest #preprints in #DevBio, #StemCells and related fields, and here's a list of what we found:
thenode.biologists.com/june-in-prep...

Congrats to everyone involved! As usual, if we've missed anything, let us know.

Collage of figures extracted from featured preprints

We're just putting together our next #preprint list, covering research using #microscopy to answer biological questions.

We've got a great list so far showcasing a whole host of imaging techniques, including some amazing ExM and vEM images, but we'd love to hear your recommendations!
#preprints

Have a nice #FluorescenceFriday! This is the tip of a fig wasp antenna with auto-fluorescence in blue and DNA in red! These insects are very very tiny

oh it is #WorldPolychaeteDay!
and I used this beautiful weirdo photo to doodle this #SciArt piece last year while half delirious after a flight from the UK to Seattle 🪱

Awesome series of extraordinary images😍

Stoked to share TWO preprints on mitochondrial pearling! 🎉
We uncover how spontaneous #mitochondria pearling drives #mtDNA nucleoid distribution (doi.org/10.1101/2024...), and
@gavsturm.bsky.social
et al. dissect the biophysics behind it (doi.org/10.1101/2024...). Details below! 🔬🧵🧪

A Boa Constrictor brain-derived cell expressing a viral glycoprotein (magenta) and stained for actin (yellow) and DNA (white).

#FluorescenceFriday

After 7 years and a lot of memories, I've finally decided to retire Zebrafish Rock! on social media. I really want to say it was always positive but I've had a tumultuous experience with the account. Those that make the community more toxic continue to be promoted to positions of power. 1/4

MBL scientists use skates and their embryos to study skeletal development. By shining a light through egg cases, scientists can watch the entire maturation process.

Learn more about skates as a research organism here: bit.ly/3Rmvq3F

📹 Bioquest

Looks like an amazing venue!