A stipple illustration of a trilobite fossil. It's curved concavely, with its rounded head to the bottom right.
Phacops trilobite #FossilFriday 🐡🎨
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Happy #FossilFriday! This is the skull of Nakanonectes (MOR 3072), one of the last plesiosaurs to cruise the Western Interior Seaway in the Cretaceous Period. With a mouth full of needle-like teeth, it ate small fish and cephalopods. #[bit.ly/4sp4wIE
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Transition from terrestrial to amphibious marine lifestyle: One of the earliest #pinnipeds (Potamotherium) was likely a whisker specialist.
Lyras et al 2023 Communications Biology. Fossil #brains provide evidence of underwater feeding in early #seals doi.org/10.1038/s420...
#FossilFriday
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Bryan sits on a stool amongst shelves of fossils. Bryan is holding a piece of petrified wood that's about six inches long.
Carol stands on a stepladder in the fossil vaults, which doesn't scare anyone, definitely not. Carol can do what she wants.
University of Oregon student Gracie poses with a taxidermied pangolin from the original Thomas Condon fossil collection.
University of Oregon student Sage is working on #sciart illustrations of the fossils sitting on their desk.
Volunteers in our fossil collections make sure they're organized, accessible, and recorded in our digital database. Thanks to Bryan, Carol, Gracie and Sage, and all of our other volunteers for the thousands of hours they dedicate to these collections! #fossilfriday #volunteerappreciation
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There is no problem on earth that doesn't have a simple fix.
The fix may never be discovered, but it's definitely there somewhere.
@johnmoffitt.bsky.social
@flojohorman.bsky.social
#FossilFriday
#PaleoArt #SciArt #Fossils #Travel #PalaeoArt
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A slab of dolostone riddled with internal molds of pentamerid brachiopods (label: Pentamerus sp.) Oh, yeah, there's also a big-ass cranial reconstruction of Dunkleosteus in profile behind it.
#FossilFriday brings us everybody's favorite early Paleozoic fossil: Pentamerus! These rhynchonelliform (=articulate) brachiopods are typically preserved as molds in dolostone due to the dissolution of primary calcite.
Oh, yeah, I guess there's a big, charismatic Devonian placoderm too. 🧪⚒️
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For #FossilFriday, I wanted to say thank you to everyone who shared my letter. Ultimately I hoped to have many people read it and get people thinking and talking about these issues that effect many in our field. Had lots of constructive conversations and will continue to push for safety for all!
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#fossilfriday adult and juvenile skulls of the boomerang-headed amphibian Diplocaulus from the famous Permian Red Beds of Oklahoma. On display at the Sam Noble Oklahoma Museum of Natural History, Norman.
#permian #samnoblemuseumofnaturalhistory #prehistoricoklahoma #redbeds
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#FossilFriday: Brachiosaurus, from the Upper Jurassic of Africa. On display at the Museum für Naturkunde Berlin.
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Another reptile group from the Cretaceous seas of Colombia: the long necked elasmosaurs, Callawayasaurus and Leivanectes.
Unlike their heavier, shorter necked kin, elasmosaurs specialised in smaller prey, perhaps infiltrating schools of fish using their long necks. #FossilFriday
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Mastodon tooth is 23 cm long by 13 cm tall.
A view of the grinding surfaces, showing glossy and polished-appearing preservation.
Mastodon tooth, North Sulphur River, NE Texas. At this locality Pleistocene alluvium overlays Late Cretaceous marine sediments, making for a double-whammy fossil collecting opportunity.
#fossilfriday #mastodon #tooth #pleistocene #fossilcollecting
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A friend found the infamous “black tooth” back in 2018 — and now we’re waiting for the radiocarbon dates.
A depiction indicating twelve teeth will be radiocarbon dated.
The timeline in question is Pleistocene to Holocene.
A post glacial landscape with a horse and a mammoth.
#LostBones #FossilFriday
Horses vanished from North America ~10K years ago — yet their fossilized teeth keep turning up in the Midwest.
No radiocarbon dates have ever been documented in Minnesota.
Dating begins this summer. What will the results reveal.
More: open.substack.com/pub/marcusbr...
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#fossilfriday ⚒️
is anyone in central ohio interested in a whole lot of exposed bedrock for fun paleontology and/or geology fun. come look. i think i found a few interesting features. i want to pick some brains. i want to know what i am standing on.
💚⚒️💚
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For #FossilFriday enjoy this incredible fossil viper fish, Eurypholis boissieri. A Cretaceous era fossil from Lebanon. #palaeontology #fossils #fish
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A fossil tooth of a cow shark embedded in a small gray sandstone block. The tooth has a flat, rectangular root and a crown shaped like a sawblade with ten recurved crowns decreasing in size to the right hand side.
#fossilfriday The nicest cow shark (Hexanchus griseus) tooth I ever found, or have ever seen - latest Miocene (6 myo) Purisima Formation, Santa Cruz. I donated this to the Santa Cruz museum about 20 years ago. From an upcoming monograph on the Purisima vertebrate assemblage.
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Photograph of a beer bottle with a blue label with a theropod dinosaur skull silhouette and the name of the beer, 'Chesil'.
Just realised that today is #FossilFriday, the sun's over the yardarm, and I still have an unopened (but not for long) beer from my last visit to Dorset.
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For #fossilfriday
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Happy #FossilFriday meet Kaprosuchus saharicus! Nicknamed the “Boar croc” Kaprosuchus lived during the late Cretaceous of Niger 🇳🇪 roughly 95 million years ago. Kaprosuchus is a member of the Mahajangasuchidae an early branch of notosuchian crocodiles
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Fun visit last week to the American Museum of Natural History! Such impressive displays of giant fossil turtles, dinos, and more.
#FossilFriday
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Image of putative microbial mats showing pairs of alternating cream coloured wrinkled layers with thinner dark wrinkled layers. A red scale bar shows the image is around 1.5 cm long and 1 cm tall.
Image of putative microbial mats showing pairs of alternating cream coloured wrinkled layers with thinner dark wrinkled layers. One of the pale layers forms a thick tadpole shaped structure in the middle of the image. A red scale bar shows the image is around 1 cm long and 0.5 cm tall.
#FossilFriday Some close ups from interesting layers in putative #Paleoarchean microbialites. Dark material is silty mudstone with organic matter, lighter layers are of unknown composition atm. Exact age and locality withheld.
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Preveligiado de realizar 6 excursiones en @casacienciasevcsic.bsky.social "La Historia de la vida en Sevilla" para estudiantes , una excelente manera de celebrar "Geología" - día de la educación geológica en España. EN today 6 palaeo excutsions to students, to celebrate Geoeducation #Fossilfriday 🦖
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Transverse section of fossil wood showing files of polygonal to rounded conducting cells and 5 rays (the brown vertical "lines")
#FossilFriday reminder that there are very old fossil #plants with very well preserved cellular detail!
This is a piece of wood from a tree that grew ~340 million years ago (early Carboniferous) in what is now France, prepared as thin-section & seen under the microscope 🔬 🌿⛏️ #paleobotany #botany
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First page of the Livius et al. (2026) article in JVP: https://bit.ly/48oGPZG. Superimposed on the page is a Zoom screen capture of Marissa Livius' master's proposal defense from May 2021 with Jordan Mallon, Witmer, Hillary Maddin, Michael Ryan, and Marissa.
Photograph of a cast of the holotype skull of Panoplosaurus mirus (CMN 2759) in the foreground, with some other ankylosaurs lurking in the background (Gastonia, Ankylosaurus, Pawpawsaurus).
CT-scan-based volume renders of the Panoplosaurus mirus holotype skull (CMN 2759) (top), a referred specimen of P. mirus ROM 1215 (middle), and a referred skull of Edmontonia rugosidens AMNH 5381 along with a slice through the snout (bottom).
Photos from a May 2025 post (while finalizing details for the Livius et al. manuscript) focusing on the Edmontonia rugosidens holotype (USNM 11868). At top right is Witmer studying the old-fashioned x-ray film-based versions of the 1998 CT scan we made of the skull. The middle photo shows lateral views of the skull, and the bottom photo shows stereoscopic photos of the ventral surface of the skull.
#FossilFriday From the depths of the pandemic to a wonderful #OA article out this week in @societyofvertpaleo.bsky.social—https://bit.ly/48oGPZG—congratulation to Marissa Livius, Jordan Mallon, & the whole team! A blast to dig back into ankylosaurs to sort out the Panoplosaurus-Edmontonia mess.
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Happy Fossil Friday from Elevation Science and the Montana Natural History Center!
Jason Poole takes a closer look at dinosaur vertebrae; their structure and the pathologies that can reveal injury and life history.
@mtnaturalist.bsky.social
#paleontology #fossilfriday
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Hello, #FossilFriday! Teeth of the Ala. State Fossil, the archeocete whale Basilosaurus cetoides from the Pachuta Marl Mbr. of the Yazoo Clay (Late Eocene), Washington Co, AL. These specimens now on display at @mcwanescience.bsky.social in Birmingham.
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遅刻。桜木町駅前のピオシティ地下にある喫茶店「花壇」の店舗外壁はには山口県産大理石の白鷹🇯🇵が使われていました！でもポスターや看板で隠されてしまっています‥‥。サンゴやウミユリの化石を発見！
#街の中で見つかるすごい石
#UrbanGeology
#金曜日だから化石貼る 土曜だけどな
#FossilFriday
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This turkish eurypterid, despite its relatively generic look, is of great importance in the understanding of how these animals evolved before their Silurian golden age, both when looking at species relationships, paleobiogeography & science’s history. Size : a bit more than 10cm of body length Time period : Late Ordovician Paleoart speculativometer : Mostly based on another taxon The animal drawn looks a bit like a scorpion but without claws, short spiny legs at the front, a last pair of legs enlarged and used as fins, and a long sword-like telson in place on the sting
What time is it? It’s #Cheliceratime & #Fossilfriday!
Today, one of my favourite eurypterids for all it represents, Paraeurypterus anatoliensis!
All the basic infos are here but if you want to learn more, there’s more below!⬇️🧵
#eurypterid #ordovician #turkey #paleoart #sciart #bugsky #invert
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a depiction of the terrestrial crocodylomorph caipirasuchus amidst undergrowth
an almost complete specimen of caipirasuchus
happy #fossilfriday! bonus: is caipirasuchus, a notosuchian from late cretaceous brazil. the species c. catanduvensis was described by iori et al. in 2024, and its palate suggests that it may have been a social animal that relied on vocalisations for communication
(art by rodolfo nogueira)
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