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Jean-François Cudennec @limpetnerd.eurosky.social · 15h

The only official penis of the European map is this one

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Jean-François Cudennec @limpetnerd.eurosky.social · 16h

I thought had an agile mind before seeing this

A map of Europe, but there’s something off

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Jean-François Cudennec @limpetnerd.eurosky.social · 02/10/2026

(Paywalled) source : www.sciencedirect.com/science/arti...

sciencedirect.com

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Jean-François Cudennec @limpetnerd.eurosky.social · 02/10/2026

Another cool find for #FossilFriday: 66 Mya, a theropod dinosaur munched on a toothed diving bird, and we know it because its feathers were preserved in the dino's 💩 #PaleoSky ⚒️🧪🦕

While some dinosaurs are thought to have had ‘fuzzy’ or ‘downy’ feathers (shown in this illustration as the yellow spikes on a Nanotyrannus’ neck), ancient birds (such as the one in the Nanotyrannus’ mouth) were more likely to have had feathers that look similar to the birds of today. Image credit: Andrey Atuchin.

The fossilized feather of a hesperornithiform bird exposed on the surface of the 66-million-year-old coprolite. Image credit: O’Connor et al., doi: 10.1016/j.cub.2026.08.054.

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Jean-François Cudennec @limpetnerd.eurosky.social · 02/10/2026

A gorgeous specimen for #FossilFriday : the internal cast of a Jurassic bivalve (Pleuromya cf. uniformis), turned into a talisman with a religious Islamic inscription : ‘There is no god but Allāh [and] Muḥammad is His Prophet’ #PaleoSky ⚒️🏺🧪🦑🦕

Fig. 1. Pleuromya cf. uniformis (Sowerby 1813), Jurassic, Morocco. Internal mould of articulated specimen bearing a religious inscription in high relief. Museo Geominero, Madrid, catalogue number MGM-7809X. (a) Left valve view; (b) right valve view; (c) anterior view; (d) dorsal view; and (e) detail showing striations visible on the surface of the letters (left arrow) and how a fissure in the rock also affects the letter (right arrows), indicating that the letters were carved in high relief and do not represent surface adherences of any foreign material. The thick patina of dirt that covered the specimen, originally dark grey in colour, was removed by washing with detergents, alternating with immersions in hydrogen peroxide.

Source : https://www.lyellcollection.org/doi/full/10.1144/jgs2026-014

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Jean-François Cudennec @limpetnerd.eurosky.social · 28/09/2026

Aren't these supposed to flower in Spring ? 😅

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Jean-François Cudennec @limpetnerd.eurosky.social · 27/09/2026

So a bird (wood pigeon ?) crashed into our window, and the detail of the feather structure imprinted on the glass is just… 🤯🦉

The marks left by the bird on the window : the silhouette and wing can clearly be seen

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Jean-François Cudennec @limpetnerd.eurosky.social · 25/09/2026

🦉Since we moved, we've been blessed with a tawny owl calling from somewhere in our garden almost every night. I've always been a hopeless owl chaser and have never managed to find one myself (let alone photograph one). Any tips? Where to look, best time to go out…

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Jean-François Cudennec @limpetnerd.eurosky.social · 23/09/2026

I’ve been quiet lately: fieldwork on an uninhabited island, workshops with students, buying our dream house (and its forest), moving in 2 dogs + 2 kids, a baby due this winter… Not much time left for shitposting. The hardest part? Staying focused while limpets still occupy 99% of my brain.

Two kids looking at lush trees through a large window

Prospection on Beniguet island, the Britton flag proudly displayed on the dGPS

An infant jawbone, dated back to early middle age
Béniguet - France

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Reposted by Jean-François Cudennec

c milagros @bibibivalve.bsky.social · 30/07/2026

cant be normal about Cenozoic molluscan taxonomy I’m so so sorry

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Reposted by Jean-François Cudennec

Dave Rodland @daverodland.bsky.social · 24/07/2026

I missed #MolluskMonday this week, so #FossilFriday is doing double duty with a small inoceramid. These bivalves could grow well over a meter across in the Cretaceous Interior Seaway, and it is generally suspected that they harbored some variety of sulfur metabolizing bacteria as chemosymbiotes. ⚒️🧪🦪

Label:
"Inoceramus barabina
Cretaceous
Locality unknown"

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Jean-François Cudennec @limpetnerd.eurosky.social · 24/07/2026

The vertical design (D) has a very cool detail : the species’ call is also represented

Detail of the 10 euros banknote, with a sonogram of the species vocalisation

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Jean-François Cudennec @limpetnerd.eurosky.social · 24/07/2026

The bluest blue I’ve ever seen 💙 Gentiana sp. (Brachyphylla maybe?)

A small patch of deep blue flowers growing among the rocks, somewhere in the Vanoise massif, at 2800 m asl

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Jean-François Cudennec @limpetnerd.eurosky.social · 24/07/2026

Completely obsessed by these euro banknote design proposals 🦉 Ursula, give us the bird money !

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Reposted by Jean-François Cudennec

Tom Sharpe @tomsharperocks.bsky.social · 20/07/2026

#MolluscMonday: the diamond-shaped cross section of a Pinna shell in life position, silicified and infilled with chalcedony. Lower Lias (Early Jurassic), Glamorgan coast, South Wales.

Grey limestone rock with a diamond-shaped shell infilled with a white & grey mineral.

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Jean-François Cudennec @limpetnerd.eurosky.social · 20/07/2026

This summer the fields turned yellow, the beaches turned green and the only thing left to harvest is what rots in the sand. But Argentina lost, so it’s all good.

A beach in Brittany, covered by a green tide (Ulva sp.). A tractor is collecting the rotting sea weed to prevent sanitary issues.

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Jean-François Cudennec @limpetnerd.eurosky.social · 19/07/2026

Yeah intensive livestock farming may be a monstrosity against animal welfare and both a climatic sanitary plague, but at least coastal ecosystems are devastated.

A spectacular green tide (Ulva sp.) in the bay of Douarnenez, Brittany, France.

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Reposted by Jean-François Cudennec

Adiel Klompmaker @paleoadiel.bsky.social · 17/07/2026

#FossilFriday‼️ 😲 Who does not like a well-preserved, large Cretaceous oyster like this Exogyra ponderosa? This one comes even with a repair scar! Campanian-aged Demopolis Formation, Alabama. Specimen: The University of Alabama Museums Research & Collections. #paleontology #fossil

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Reposted by Jean-François Cudennec

Matt Bracken @brackenlab.bsky.social · 14/07/2026

Where intertidal rocky reefs are composed of “soft” rock - such as the sedimentary mudstones and sandstones of the Point Arena Formation in Mendocino County, California - sea urchins create circular niches by abrading the substratum. #MarineLife #SwelterShelterNSF 🌊🦑

A bunch of purple urchins (*Strongylocentrotus purpuratus*) in their concave, circular niches, along with one sea anemone (*Anthopleura sola*) taking advantage of an otherwise unoccupied niche. They are surrounded by pink, encrusting coralline algae.

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Jean-François Cudennec @limpetnerd.eurosky.social · 15/07/2026

Depend on the season I’d say, between a few days and a few weeks

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Jean-François Cudennec @limpetnerd.eurosky.social · 15/07/2026

Anthropocene is cancelled. Welcome to Pyrocene 🔥

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Jean-François Cudennec @limpetnerd.eurosky.social · 15/07/2026

Limpets graze biofilm using their radula, a tongue like structure covered in tiny teeth, leaving specific markings on the rocks. Modelling works shows that these animals are close to the optimum when it comes to cover a surface by crawling, and without passing two time on the same spot 🦑🌊🌍🌿

Grazing marks from common limpets on a rock.

Credit : Laetitia Beauverger

Source : https://www.pnas.org/doi/epdf/10.1073/pnas.1405966111

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Jean-François Cudennec @limpetnerd.eurosky.social · 13/07/2026

End of heatwave has been postponed, again. And another one has been scheduled for the end of July. Dreaming of « The atrium of a Roman house during heavy rain » by Luigi Bazzani, 1882.

« The atrium of a Roman house during heavy rain » by Luigi Bazzani, 1882.

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Jean-François Cudennec @limpetnerd.eurosky.social · 10/07/2026

And some other examples : - From South Dakota : www.jstor.org/stable/25669... - From the Natufian : www.researchgate.net/publication/... I'm sure there's plenty of other examples !

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Jean-François Cudennec @limpetnerd.eurosky.social · 10/07/2026

Here's a paper (in French) about the ornaments on the kid from La Madeleine cave (Upper Palaeolithic) journals.openedition.org/paleo/1058?l...

a-b: plan and stratigraphy of the La Madeleine site with location of the burial; c: sketch of the burial indicating the arrangement of the personal ornaments.

After Capitan and Peyrony 1928.

Ornaments associated to the La Madeleine child.

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Jean-François Cudennec @limpetnerd.eurosky.social · 10/07/2026

Scaphopods were also widely used as ornaments by prehistoric people: with an opening on both ends of the shell, they are particularly convenient to hang on a thread. But since they’re underwater critters, they were usually digged from fossil beds (happened at least in France and N. America)

Scaphopods ornaments in prehistoric grave

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Jean-François Cudennec @limpetnerd.eurosky.social · 10/07/2026

3/ cold spells would still occur, long enough to allow the establishment of sub-boreal biota, in a sort of glacial/interglacial oscillation, but with a poorly understood kinetic. A truely fascinating formation, were Mediterranean and Subpolar species co-occurs in single fossil beds !

A) Glycymeris obovata, warm-temperate
B) Centrocardita squamulosa ampla, subtropical
C)Arctica islandica, subpolar

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Jean-François Cudennec @limpetnerd.eurosky.social · 10/07/2026

2/ refining our climatic forecasts. My postdoc at @derbyuniearth.bsky.social was specifically about palaeothermometry and palaeobiology of this Crag, and with absolute seawater temperature derived from isotopic data collected on fossils, we showed that even during a « warm » period,

The Sudbourne Park excavation of the Ramsholt member of the Coralline Crag.

Suffolk, 2023

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Jean-François Cudennec @limpetnerd.eurosky.social · 10/07/2026

1/ Yay, Coralline Crag mentioned ! 🎉 This formation contains puzzling evidences for both warm and cold climates, and since the Pliocene is a good analog for a +2 °C/450 ppm CO2 planet, understanding what’s happening there is crucial for…

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Jean-François Cudennec @limpetnerd.eurosky.social · 10/07/2026

My optimistic side wants to think that if my Discover feed is so lame, it’s because of the algorithm, not because people here are intrinsically boring.

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Jean-François Cudennec @limpetnerd.eurosky.social · 30/06/2026

You liked the flash flood ? I hope you’ll like the flash drought

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Jean-François Cudennec @limpetnerd.eurosky.social · 30/06/2026

France: just endured two consecutive historic heatwaves, with a third on the way (and it’s not even July yet) French authorities: don’t address the criticism about mass mortality and lack of preparation, but give the green light to a controversial climate-wrecking highway project.

« final go-ahead for this controversial project: the Council of State has approved the environmental permit for the A69 motorway »

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