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Dave Rodland @daverodland.bsky.social · 14/07/2026

It's #TrilobiteTuesday and old friends sent me this after a visit to the Field Museum, so I guess I'm obliged to share? Or visit again, whatever. Apparently the Pokémon fossil exhibit is really good too.

Field Museum trilobite display. A circular platform with a glass covered recess holding a diverse assemblage of Paleozoic trilobites. Photo courtesy of the Hrycko family.

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Luis Collantes @luiscollantes.bsky.social · 02/07/2026

My friend Lorenzo Lustri and I made this video about his study on Urokodia aequalis, an exceptionally preserved Early #Cambrian arthropod from the Chengjiang Biota, published yesterday in #Nature. 👉 Link to the paper: www.nature.com/articles/s41... #palaeontology #fossil #cambrian

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Kenneth De Baets @djbirddanerd.bsky.social · 25/06/2026

#Three-dimensionally preserved #appendages of the early #Cambrian #trilobite Yunnanocephalus yunnanensis @peerj.bsky.social peerj.com/articles/21095 #Biodiversity #Evolution #Paleobiology #Paleontology #Taxonomy #Fossils

3D reconstruction of the biramous appendage of Yunnanocephalus yunnanensis (Mansuy, 1912) with six labeled views: dorsal, ventral, anterior, posterior, lateral distal, and lateral proximal. The protopodite and endopodite are based on direct scan observations, while the exopodite is reconstructed by inference. Labeled structures include endites, endopodite, exopodite (proximal and distal lobes), gnathobasic spines, lamellae, protopodite, setae, and terminal claw. Not to scale. More information: https://doi.org/10.7717/peerj.21095/fig-5

X-ray microcomputed tomography model of Yunnanocephalus yunnanensis (Mansuy, 1912), specimen YKLP 17210, showing six views: dorsal, lateral, ventral-lateral, ventral, antennae detail, and first thoracic appendages in ventral view. Labeled structures include antennae, articles, cephalon, endopodite, exopodite, left and right cephalic and thoracic appendages (lC1–lC4, lT1–lT14, rT1–rT14), and thorax. Scale bars: 2 mm (A–D), 0.5 mm (E), 1 mm (F). More information: https://doi.org/10.7717/peerj.21095/fig-1

X-ray microcomputed tomography model of Yunnanocephalus yunnanensis (Mansuy, 1912), specimen YKLP 17211, showing six views: dorsal, lateral, ventral-lateral, ventral, ventral view of the cephalic area, and detail of the first thoracic appendages in ventral view. Labeled structures include antennae, endites, endopodite, exopodite, gnathobasic spines, putative hypostome and labrum, lamellae, left and right cephalic and thoracic appendages (lC1–lC4, rC2–rC4, lT1–lT16, rT1–rT16), and terminal claw. Scale bars: 3 mm (A–D), 2 mm (E–F). More information: https://doi.org/10.7717/peerj.21095/fig-3

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Luis Collantes @luiscollantes.bsky.social · 25/06/2026

🚨New trilobite paper🚨 I’m beyond excited to share my new paper on the three-dimensional ventral anatomy of the trilobite Yunnanocephalus yunnanensis from the world-renowned Chengjiang Lagerstätte. #trilobite #fossil #palaeontology #MicroCT Link: peerj.com/articles/210...

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Fossil Record @fr.pensoft.net · 22/06/2026

First fossil evidence of anguine lizards (likely Pseudopus) from the Tortonian-age Libros Konservat-Lagerstätte in Teruel, Spain. Learn more here: doi.org/10.3897/fr.2... #anguinelizard

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Paul D. Taylor @nhmbryozoa.bsky.social · 23/06/2026

#TrilobiteTuesday Another trilobite on display at the Palaeontological Museum in Oslo. This one is Asaphus expansus,

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Luis Collantes @luiscollantes.bsky.social · 18/06/2026

Descubierto en Teruel un juvenil del escorpión marino más grande del mundo [ENG] A juvenile specimen of the world’s biggest marine scorpion found in Teruel elpais.com/espana/2026-...

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Luis Collantes @luiscollantes.bsky.social · 17/06/2026

On June 25th, there will be some exciting news for the trilobite community. And these two little guys are part of the story. #trilobite #cambrian #palaeozoic #paaeontology #fossil #china #chengjiang

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Paul D. Taylor @nhmbryozoa.bsky.social · 09/06/2026

#TrilobiteTuesday Ampyx from the Ordovician of Asker, Norway. On display in the Geologisk Museum, Oslo.

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Cam Muskelly (Explorer of Deep Time ⏰ ⚒️) @cambriancam.bsky.social · 09/06/2026

Welcome back to #trilobitetuesday Here is the section of the Asaphid Anataphurs vigilans that I collected from the Upper Ordovician (Katian) Maquoketa Shale in Frankford, Missouri.

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PaleoJim @paleojim.bsky.social · 03/06/2026

I know I'm late for #TrilobiteTuesday but is you love Trilobites, you really need this book. utahmapstore.com/products/MP-... at $17.99 it is an amazing deal By: Richard A. Robison, Loren E. Babcock, and Val G. Gunther, it is 97 pages of full color Utah Cambrian goodness.

utahmapstore.com

Exceptional Cambrian Fossils from Utah: A Window Into the Age of Trilo

By: Richard A. Robison, Loren E. Babcock, and Val G. Gunther Few places have a better fossil record of Cambrian life than Utah. In Exceptional Cambrian Fossils from Utah: A Window Into the Age of Tril...

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Thomas R. Holtz, Jr. @arctomet.bsky.social · 03/06/2026

Z. Belaústegui et al. (2026) The fossil record of insect bone bioerosion: Insights from titanosaur remains at Lo Hueco (Late Cretaceous, Spain) and implications for continental ichnofacies Earth-Science Reviews 105561 doi: doi.org/10.1016/j.ea... www.sciencedirect.com/science/arti...

doi.org

Redirecting

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Luis Collantes @luiscollantes.bsky.social · 29/05/2026

Bicknell et al. - New exceptionally preserved arthropod from the Furongian of Canada doi.org/10.1186/s129... #Cambrian #arthropd #fossil #Canada #palaeontology

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Luis Collantes @luiscollantes.bsky.social · 28/05/2026

Yoshino & Oji - A bivalved arthropod from the lower Ordovician Fezouata Shale suggests the post Cambrian survival and gigantism of Isoxys (Isoxyda, Isoxyidae) doi.org/10.1080/0891... #Ordovician #Isoxys #Fezouata #fossil #palaeontology

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Tom Sharpe @tomsharperocks.bsky.social · 26/05/2026

Just realised it's #TrilobiteTueaday so here's a pic of a little beastie I saw that was set into the paving in the new gardens @nhm-london.bsky.social. Not sure what it is; looks a bit Paradoxides-like to me.

Brass outline of a trilobite inset into a laved surface of black chips in a grey matrix.

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Daniel Álvarez @dalvarez-01.bsky.social · 22/05/2026

I forgot to post a picture of this trilobite found by a friend — and now it’s mine. Really nice preservation and colors. In the thread you can see another photo with the negative. #Trilobite #Fossil #Paleontology #Geology

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Luis Collantes @luiscollantes.bsky.social · 23/05/2026

🚨🌋 New collaboration paper! I’m really happy to have contributed to this paper in which we reconstruct the facies architecture and emplacement dynamics of a Cambrian submarine basaltic lava-flow system from Cumbres Mayores, Huelva (SW Spain). #geology #volcanology #pillowlava #cambrian #spain

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Dr Susannah Lydon @susieoftraken.bsky.social · 22/05/2026

Overly honest museum labels #1 "Graptolites which look as if someone has scribbled all over the rock!" Leptograptus capillaris, on display in National Museum of Scotland, Edinburgh #FossilFriday 🌍⚒️✏🧪🔬

A museum label which says "1 Graptolites which look as if someone has scribbled all over the rock! Leptograptus capillaris, Dob's Linn, Dumfriesshire G1984.8.31

Leptograptus capillaris, a graptolite fossil which looks like a light grey scribble on a dark grey rock.

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EDGE @edgescience.bsky.social · 21/05/2026

🚨NEW STUDY DROP🚨 Another bivalved Arthropod has been described as, Cassicaris clarksoni. based on over 200 specimens from the early Cambrian (Stage 3) Xiaoshiba Lagerstätte in Kunming, China. It had a bunch of spines running down its tail, with paddle-shaped organs at the end.

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Cam Muskelly (Explorer of Deep Time ⏰ ⚒️) @cambriancam.bsky.social · 19/05/2026

Welcome back to #trilobitetuesday Here is a slab of shale with trilobites Olenellus chiefensis. This comes from the Lower Cambrian (Series 2, Stage 3) Combined Metals Member in the Pioche Shale in Lincoln County, Nevada.

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Fossil Record @fr.pensoft.net · 19/05/2026

🐸A near-complete male ranid frog skeleton from the early Oligocene of France sheds new light on the deep roots of Pelophylax in Europe and hints that V4 vertebra shape may help tell species apart. Find out more here: doi.org/10.3897/fr.2... #paleontology #herpetology

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David Clark @clarkeocrinus.bsky.social · 19/05/2026

Something tiny for #TrilobiteTuesday This is a Meadowtownella trentonensis from the famous Walcott-Rust quarry in New York. This was one of the first sites to show trilobite legs. Charles Walcott later discovered the Burgess Shale in Canada. This specimen is upside down and only 7 mm long.

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Luis Collantes @luiscollantes.bsky.social · 19/05/2026

A plate with abundant specimens of Yunnanocephalus yunnanensis from the Chengjiang biota. #TrilobiteTuesday #palaeontology #fossil #trilobite #china

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Southern Minnesota Museum of Natural History @smmnh.bsky.social · 17/05/2026

A flower beetle in baltic amber. We hope to raise money for a museum microscope so kids can examine insect specimens like this one!

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Luis Collantes @luiscollantes.bsky.social · 17/05/2026

Fatka et al. - Remains of the digestive system in the middle Cambrian trilobite Ptychoparioides henkli Kordule, 2006 (Barrandian area, Czech Republic) #palaeontology #fossil #trilobite sciencepress.mnhn.fr/en/periodiqu...

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Alyssa F. @slyssabits.bsky.social · 17/05/2026

Hey folks! my first ever (and first author) paper is out! 🌊🐚 onlinelibrary.wiley.com/doi/abs/10.1... In this paper, we explore the fine details in the internal and external structure of a type of small shelly fossil (SSF) from the Cambrian to determine how they relate to one another.

onlinelibrary.wiley.com

Sclerite fusion, ultrastructure, micro‐ornament and homology in early Cambrian eccentrothecimorph tommotiids

Tommotiids are an enigmatic but important group of early Cambrian lophotrochozoans, characterized by a complex external skeleton (or scleritome) comprised of fused or cataphract organophosphatic scle...

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Luis Collantes @luiscollantes.bsky.social · 12/05/2026

🚨A new approach to the study of the early Cambrian medusozoans from Constantina New statistical methods allowed the establishment of new biometric parameters, a more precise determination of the number of imprints (a total of 275), and the identification of their main taphonomic characteristics.

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Prehistorica (Christian M.) @prehistorica.bsky.social · 09/05/2026

Canadaspis perfecta gathering to mate and moult in the Cambrian-age Burgess Shale. In layer -350 of the Walcott Quarry (Phyllopod Bed), Canadaspis gathered in such great concentrations that one slab of shale, roughly 1 square metre in area, was covered in over 700 individuals.

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Luis Collantes @luiscollantes.bsky.social · 09/05/2026

Day off to visit the Yunnan Museum, with its outstanding representation of the Chinese Bronze Age, followed by a short visit to the Guandu Ancient City #Kunming #China

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David Clark @clarkeocrinus.bsky.social · 08/05/2026

This is a Mississippian aged crinoid, Taxocrinus, from the Indian Shale Fm. of Indiana. I've collected this site a few times and found lots of blastoids. Crinoids are much less common. #FossilFriday

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Lukas Laibl @lukaslaibl.bsky.social · 06/05/2026

So you've heard about trilobites, but do you know Naraoids? These trilobite cousins shared similar bodies but differed in details. Most importantly, they lacked hard exoskeleton and had only soft cuticle. That's why they are known only from sites with exceptional preservation, such as Burgess Shale.

Naraoia from the famous Burgess Shale, photographed by JB Caron, deposited in ROM

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Luis Collantes @luiscollantes.bsky.social · 06/05/2026

🚨Daley et al. - Euarthropods from the Early Ordovician Cabrières Biota, including a new aglaspidid and freshly moulted trilobite material #paleontology #fossil #ordovician Link to the paper: lnkd.in/d3YXjWdH

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David Clark @clarkeocrinus.bsky.social · 05/05/2026

The Silurian Rochester Shale near Middleport, New York has an amazing assemblage of trilobites and crinoids. Calymene niagarense is one of the more common trilobites. This Diacalymene is a close relative, but much rarer. Even partials like this are worth keeping. #TrilobiteTuesday

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Luis Collantes @luiscollantes.bsky.social · 04/05/2026

🚨Laibl et al. - A new species of Soomaspis (Naraoiidae) from the Upper Ordovician of Bohemia #paleontology #fossil #arthropoda www.geology.cz/bulletin/con...

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Luis Collantes @luiscollantes.bsky.social · 03/05/2026

🚨Lerosey-Aubril & Ortega-Hernández: A chelicera-bearing arthropod reveals the Cambrian origin of chelicerates doi.org/10.1038/s415... #paleontology #fossils #cambrian

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Luis Collantes @luiscollantes.bsky.social · 02/05/2026

Back in Kunming! The 'City of Eternal Spring' greeted me in full bloom.

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Luis Collantes @luiscollantes.bsky.social · 30/04/2026

Richards & Ortega-Hernández - Predator–prey scaling laws support a suspension-feeding lifestyle in Cambrian luolishaniid lobopodians #paleontology #fossils #arthropods #cambrian doi.org/10.1098/rsbl...

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Luis Collantes @luiscollantes.bsky.social · 30/04/2026

The typical thing you would find in your pocket if you were me 🤦🏻‍♂️🤣 #trilobite #paleontology #fossil

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Luis Collantes @luiscollantes.bsky.social · 29/04/2026

Losso et al. - Lamellar surface area calculations support respiratory function of trilobite exopodites doi.org/10.6084/m9.f... #palaeontology #fossils #trilobites

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IGC2028Canada @igc2028canada.bsky.social · 27/04/2026

📢 DID YOU KNOW that the First Circular of 38th International Geological Congress is NOW available, and the Call for Sessions is officially open? 🎉 www.igc2028canada.org/igc-2028-cir... #IGC2028Canada #GeosciencesForHumanity #DidYouKnow #CallForSessions #GetInvolved

igc2028canada.org

IGC 2028 Calgary

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Alberta Palaeontological Society @abpalaeosociety.bsky.social · 18/04/2026

Another recording from the Paleo 2026 symposium has been posted! Learn about recent research on placoderms (early armoured fishes like Dunkleosteus) with Dr. Melina Jobbins of the University of Manitoba! youtu.be/uP6ta7MP1ZY #palaeontology #paleontology #fossils #fish #placoderms #alberta

youtu.be

Fishes in a Suit of Armour - The Story of Placoderms, One of Our Oldest Jawed Relatives

YouTube video by Alberta Palaeontological Society

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Luis Collantes @luiscollantes.bsky.social · 08/04/2026

Back home after a couple of days doing fieldwork at Cerro del Hierro (Seville). Apart from the outstanding geomorphological features due to the karstification processes, this area provides a particular Cambrian trilobite association which has been known for many years but never studied in detail.

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Journal of Systematic Palaeontology @journalsystpal.bsky.social · 30/03/2026

New paper out in JSP! Cooper & Maxwell present a redescription of 𝙎𝙖𝙪𝙧𝙤𝙥𝙨𝙞𝙨 𝙡𝙤𝙣𝙜𝙞𝙢𝙖𝙣𝙖 Agassiz, 1843 from the Upper Jurassic Solnhofen Archipelago (Tithonian, Germany) and the taxonomic diversity of 𝙎𝙖𝙪𝙧𝙤𝙥𝙨𝙞𝙨 Agassiz, 1832 (Actinopterygii: Pachycormidae). Read here: buff.ly/uGXjDLA #PaleoSky

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