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The Dinosaur DaveThis week for <a href="https://sauropods.win/tags/Fossilfriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#Fossilfriday</a> we have another <a href="https://sauropods.win/tags/Guess" class="mention hashtag" rel="nofollow noopener" target="_blank">#Guess</a> that <a href="https://sauropods.win/tags/Lego" class="mention hashtag" rel="nofollow noopener" target="_blank">#Lego</a> <a href="https://sauropods.win/tags/Fossil" class="mention hashtag" rel="nofollow noopener" target="_blank">#Fossil</a>. This one I would rate as hard. This large mammal is known from Africa and Asia. Reminder: hide your answer behind a content warning. This will allow others to guess without a hint. I will post the answer tomorrow (and to anyone who guesses correctly).This was designed by Infinite Creativity.

Vincent BloksGraptolite Monograptus. Skillinge ,Sweden Corrected to Silurian , thanks Andrej <a href="https://mas.to/tags/fossilfriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#fossilfriday</a> <a href="https://mas.to/tags/privatecollection" class="mention hashtag" rel="nofollow noopener" target="_blank">#privatecollection</a>

Fer Castano<a href="https://mastodon.online/tags/FossilFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#FossilFriday</a> E. Stromer von Reichenbach, German palaeontologist who discovered <a href="https://mastodon.online/tags/Spinosaurus" class="mention hashtag" rel="nofollow noopener" target="_blank">#Spinosaurus</a>, was born on June 12, 1870 <a href="https://mastodon.online/tags/histsci" class="mention hashtag" rel="nofollow noopener" target="_blank">#histsci</a> ⚒️🧪 <a href="https://paleonerdish.wordpress.com/2013/08/26/ernst-stromer-and-the-lost-dinosaurs-of-egypt/" rel="nofollow noopener" translate="no" target="_blank">https://paleonerdish.wordpress.com/2013/08/26/ernst-stromer-and-the-lost-dinosaurs-of-egypt/</a>

Thomas HoltzA <a href="https://sciencemastodon.com/tags/FathersDay" class="mention hashtag" rel="nofollow noopener" target="_blank">#FathersDay</a> weekend <a href="https://sciencemastodon.com/tags/FossilFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#FossilFriday</a>: Patriofelis ferox, the "ferocious father of cats". (Despite the name, not a cat but an oxyaenid: no more closely related to cats than to walruses or dogs or bears). Mount from the American Museum of Natural History

Derò 🇨🇦Cookies!<a href="https://mastodon.sdf.org/tags/Dinosaurs" class="mention hashtag" rel="nofollow noopener" target="_blank">#Dinosaurs</a> <a href="https://mastodon.sdf.org/tags/fossilfriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#fossilfriday</a> <a href="https://mastodon.sdf.org/tags/Food" class="mention hashtag" rel="nofollow noopener" target="_blank">#Food</a> <a href="https://mastodon.sdf.org/tags/photography" class="mention hashtag" rel="nofollow noopener" target="_blank">#photography</a> <a href="https://mastodon.sdf.org/tags/3dPrinting" class="mention hashtag" rel="nofollow noopener" target="_blank">#3dPrinting</a>

Marcus Brandel🐂 <a href="https://ecoevo.social/tags/LostBones" class="mention hashtag" rel="nofollow noopener" target="_blank">#LostBones</a> <a href="https://ecoevo.social/tags/FossilFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#FossilFriday</a> 🐘🦥🐴🐪🍃 This striking left bison femur was discovered in Glenwood, Minnesota, during maintenance of the now-defunct ski hill in Barsness Park. The specimen was donated to the Pope County Historical Society in 1999.<a href="https://popecountymuseum.com" rel="nofollow noopener" translate="no" target="_blank">https://popecountymuseum.com</a> <a href="https://ecoevo.social/tags/GlenwoodMN" class="mention hashtag" rel="nofollow noopener" target="_blank">#GlenwoodMN</a> <a href="https://ecoevo.social/tags/Pleistocene" class="mention hashtag" rel="nofollow noopener" target="_blank">#Pleistocene</a> <a href="https://ecoevo.social/tags/Bison" class="mention hashtag" rel="nofollow noopener" target="_blank">#Bison</a> <a href="https://ecoevo.social/tags/Bisonbison" class="mention hashtag" rel="nofollow noopener" target="_blank">#Bisonbison</a> <a href="https://ecoevo.social/tags/MinnesotaHistory" class="mention hashtag" rel="nofollow noopener" target="_blank">#MinnesotaHistory</a> <a href="https://ecoevo.social/tags/Paleontology" class="mention hashtag" rel="nofollow noopener" target="_blank">#Paleontology</a> <a href="https://ecoevo.social/tags/CitizenScience" class="mention hashtag" rel="nofollow noopener" target="_blank">#CitizenScience</a>See the link in my profile for more Pleistocene specimens and their stories of discovery and preservation.

Historical BiologyFor <a href="https://mastodon.social/tags/FossilFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#FossilFriday</a>, we have a fossil from our editor Antonio Pineda.This fossil is the left fragment (ATE7-1) of the face of an individual assigned to our ancestor Homo aff. erectus, recovered from level TE7 of the Sima del Elefante site (Sierra de Atapuerca, Burgos) 🦴 💀

Adam S. SmithWorking in the <a href="https://sauropods.win/tags/NottNatHist" class="mention hashtag" rel="nofollow noopener" target="_blank">#NottNatHist</a> museum (<a href="https://glammr.us/@GeorgeTheGorilla" class="u-url mention" rel="nofollow noopener" target="_blank">@GeorgeTheGorilla</a>) this week with <a href="https://sauropods.win/@WitcherClo" class="u-url mention" rel="nofollow noopener" target="_blank">@WitcherClo</a> we were surprised to find fossil fish glow under UV light. This specimen of a Lower Jurassic Dapedium fish is a good example. Can any chemists tell me why though? Original hydroxyapatite and/or diagenetic calcite in the scales? Or could it be some sort of varnish!?<a href="https://sauropods.win/tags/FossilFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#FossilFriday</a> <a href="https://sauropods.win/tags/WollatonHall" class="mention hashtag" rel="nofollow noopener" target="_blank">#WollatonHall</a> <a href="https://sauropods.win/tags/museum" class="mention hashtag" rel="nofollow noopener" target="_blank">#museum</a> <a href="https://sauropods.win/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#science</a> <a href="https://sauropods.win/tags/chemistry" class="mention hashtag" rel="nofollow noopener" target="_blank">#chemistry</a> <a href="https://sauropods.win/tags/UV" class="mention hashtag" rel="nofollow noopener" target="_blank">#UV</a> <a href="https://sauropods.win/tags/paleontology" class="mention hashtag" rel="nofollow noopener" target="_blank">#paleontology</a>

The Dinosaur DaveThis week for <a href="https://sauropods.win/tags/Fossilfriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#Fossilfriday</a> we have another <a href="https://sauropods.win/tags/Guess" class="mention hashtag" rel="nofollow noopener" target="_blank">#Guess</a> that <a href="https://sauropods.win/tags/Lego" class="mention hashtag" rel="nofollow noopener" target="_blank">#Lego</a> <a href="https://sauropods.win/tags/Fossil" class="mention hashtag" rel="nofollow noopener" target="_blank">#Fossil</a>. This one I would rate as medium. This large theropod is known from Argentina. Reminder: hide your answer behind a content warning. This will allow others to guess without a hint. I will post the answer tomorrow (and to anyone who guesses correctly).This was designed by DrakeAphios.

Russell GarwoodFor a slightly late <a href="https://ecoevo.social/tags/FossilFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#FossilFriday</a> - meet an absolute unit of a fossil. This is a ~75 cm chunk of Arthropleura - an animal closely related to millipedes, and found in ~325 million yeat old rocks in the UK. The whole animal was probably a little over 2.5 m in length. <a href="https://ecoevo.social/tags/Science" class="mention hashtag" rel="nofollow noopener" target="_blank">#Science</a> <a href="https://ecoevo.social/tags/nature" class="mention hashtag" rel="nofollow noopener" target="_blank">#nature</a>

Jim SharkeyHappy <a href="https://sfba.social/tags/FossilFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#FossilFriday</a>!

The Dinosaur DaveThis weeks <a href="https://sauropods.win/tags/Lego" class="mention hashtag" rel="nofollow noopener" target="_blank">#Lego</a> <a href="https://sauropods.win/tags/FossilFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#FossilFriday</a> is <a href="https://sauropods.win/tags/Procoptodon" class="mention hashtag" rel="nofollow noopener" target="_blank">#Procoptodon</a>In the early 1800s, as Australia was being explored by white colonists, Sir Thomas L. Mitchell found fossil fragments of a maxilla from the Darling downs and sent them to England.In 1846, Sir Richard Owen published on several large marsupials. One of those was Procoptodon, a very large short faced Kangaroo. A recent trackway found in South Australia attributed to Procoptodon showed it didn't hop but walked bipedally

Peter Roopnarine<a href="https://masto.ai/tags/FossilFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#FossilFriday</a> clam. Venericardia merriami holotype, Oregon, USA. From the Eocene, shortly before the planet changed, transitioning from a Warm House to the Cool/Ice House planet that we currently have (for now). <a href="https://masto.ai/tags/paleontology" class="mention hashtag" rel="nofollow noopener" target="_blank">#paleontology</a> @calacademy.bsky.social <a href="https://mastodon.calacademy.org/@calacademy" class="u-url mention" rel="nofollow noopener" target="_blank">@calacademy</a> <a href="https://flic.kr/p/pUwnwu" rel="nofollow noopener" translate="no" target="_blank">https://flic.kr/p/pUwnwu</a>

Bob Nicholls ArtMy 25 years of palaeoart chronology...A closer look at the animals in my 2023 illustration of <a href="https://sauropods.win/tags/HellCreek" class="mention hashtag" rel="nofollow noopener" target="_blank">#HellCreek</a>, featuring ichthyornithean <a href="https://sauropods.win/tags/Birds" class="mention hashtag" rel="nofollow noopener" target="_blank">#Birds</a>, <a href="https://sauropods.win/tags/Triceratops" class="mention hashtag" rel="nofollow noopener" target="_blank">#Triceratops</a>, <a href="https://sauropods.win/tags/Tyrannosaurus" class="mention hashtag" rel="nofollow noopener" target="_blank">#Tyrannosaurus</a>, two <a href="https://sauropods.win/tags/Acheroraptors" class="mention hashtag" rel="nofollow noopener" target="_blank">#Acheroraptors</a>, a dead <a href="https://sauropods.win/tags/Pachycephalosaurs" class="mention hashtag" rel="nofollow noopener" target="_blank">#Pachycephalosaurs</a>, <a href="https://sauropods.win/tags/Brachychampsa" class="mention hashtag" rel="nofollow noopener" target="_blank">#Brachychampsa</a> (croc), <a href="https://sauropods.win/tags/Meniscoessus" class="mention hashtag" rel="nofollow noopener" target="_blank">#Meniscoessus</a> (mammal), and <a href="https://sauropods.win/tags/Chamops" class="mention hashtag" rel="nofollow noopener" target="_blank">#Chamops</a> (lizard); from DINOSAUR BEHAVIOUR, by Prof Michael Benton (published by Princeton University Press).<a href="https://sauropods.win/tags/SciArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#SciArt</a> <a href="https://sauropods.win/tags/SciComm" class="mention hashtag" rel="nofollow noopener" target="_blank">#SciComm</a> <a href="https://sauropods.win/tags/PaleoArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#PaleoArt</a> <a href="https://sauropods.win/tags/Dinosaurs" class="mention hashtag" rel="nofollow noopener" target="_blank">#Dinosaurs</a> <a href="https://sauropods.win/tags/Trex" class="mention hashtag" rel="nofollow noopener" target="_blank">#Trex</a> <a href="https://sauropods.win/tags/TyrannosaurusRex" class="mention hashtag" rel="nofollow noopener" target="_blank">#TyrannosaurusRex</a> <a href="https://sauropods.win/tags/JurassicPark" class="mention hashtag" rel="nofollow noopener" target="_blank">#JurassicPark</a> <a href="https://sauropods.win/tags/JurassicWorld" class="mention hashtag" rel="nofollow noopener" target="_blank">#JurassicWorld</a> <a href="https://sauropods.win/tags/WildlifeArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#WildlifeArt</a> <a href="https://sauropods.win/tags/FossilFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#FossilFriday</a>

Thomas Holtz<a href="https://sciencemastodon.com/tags/FossilFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#FossilFriday</a> The Permian pareiasaur Scutosaurus karpinskii at the American Museum of Natural History

George the GorillaOur T. rex skeleton is posed striding through a mock up of its own excavation. The bones in the dig are exact replicas of the bones mounted in the skeleton. Take the eroding long metatarsal bone in the centre of this picture, for example. The exact same bone is mounted in the foot (the bone on the top right of the picture). Have you visited Wollaton Hall recently!? There's lots of new things to discover.<a href="https://glammr.us/tags/FossilFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#FossilFriday</a> <a href="https://glammr.us/tags/NottNatHist" class="mention hashtag" rel="nofollow noopener" target="_blank">#NottNatHist</a> <a href="https://glammr.us/tags/dinosaurs" class="mention hashtag" rel="nofollow noopener" target="_blank">#dinosaurs</a> <a href="https://glammr.us/tags/paleontology" class="mention hashtag" rel="nofollow noopener" target="_blank">#paleontology</a> <a href="https://glammr.us/tags/museum" class="mention hashtag" rel="nofollow noopener" target="_blank">#museum</a>

Bob Nicholls ArtMy 25 years of palaeoart chronology...A 2023 illustration of the <a href="https://sauropods.win/tags/HellCreek" class="mention hashtag" rel="nofollow noopener" target="_blank">#HellCreek</a> Formation, featuring ichthyornithean <a href="https://sauropods.win/tags/Birds" class="mention hashtag" rel="nofollow noopener" target="_blank">#Birds</a>, <a href="https://sauropods.win/tags/Triceratops" class="mention hashtag" rel="nofollow noopener" target="_blank">#Triceratops</a>, <a href="https://sauropods.win/tags/Tyrannosaurus" class="mention hashtag" rel="nofollow noopener" target="_blank">#Tyrannosaurus</a>, two <a href="https://sauropods.win/tags/Acheroraptors" class="mention hashtag" rel="nofollow noopener" target="_blank">#Acheroraptors</a>, a dead <a href="https://sauropods.win/tags/Pachycephalosaurs" class="mention hashtag" rel="nofollow noopener" target="_blank">#Pachycephalosaurs</a>, <a href="https://sauropods.win/tags/Brachychampsa" class="mention hashtag" rel="nofollow noopener" target="_blank">#Brachychampsa</a> (croc), <a href="https://sauropods.win/tags/Meniscoessus" class="mention hashtag" rel="nofollow noopener" target="_blank">#Meniscoessus</a> (mammal), and <a href="https://sauropods.win/tags/Chamops" class="mention hashtag" rel="nofollow noopener" target="_blank">#Chamops</a> (lizard); from DINOSAUR BEHAVIOUR, by Prof Benton (published by Princeton University Press).<a href="https://sauropods.win/tags/SciArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#SciArt</a> <a href="https://sauropods.win/tags/SciComm" class="mention hashtag" rel="nofollow noopener" target="_blank">#SciComm</a> <a href="https://sauropods.win/tags/PaleoArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#PaleoArt</a> <a href="https://sauropods.win/tags/PalaeoArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#PalaeoArt</a> <a href="https://sauropods.win/tags/Dinosaurs" class="mention hashtag" rel="nofollow noopener" target="_blank">#Dinosaurs</a> <a href="https://sauropods.win/tags/Trex" class="mention hashtag" rel="nofollow noopener" target="_blank">#Trex</a> <a href="https://sauropods.win/tags/TyrannosaurusRex" class="mention hashtag" rel="nofollow noopener" target="_blank">#TyrannosaurusRex</a> <a href="https://sauropods.win/tags/JurassicPark" class="mention hashtag" rel="nofollow noopener" target="_blank">#JurassicPark</a> <a href="https://sauropods.win/tags/JurassicWorld" class="mention hashtag" rel="nofollow noopener" target="_blank">#JurassicWorld</a> <a href="https://sauropods.win/tags/CampCretaceous" class="mention hashtag" rel="nofollow noopener" target="_blank">#CampCretaceous</a> <a href="https://sauropods.win/tags/WildlifeArt" class="mention hashtag" rel="nofollow noopener" target="_blank">#WildlifeArt</a> <a href="https://sauropods.win/tags/FossilFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#FossilFriday</a>

bseGiant beaver is one signature away from becoming <a href="https://toad.social/tags/Minnesota" class="mention hashtag" rel="nofollow noopener" target="_blank">#Minnesota</a> 's state fossil <a href="https://toad.social/tags/paleontology" class="mention hashtag" rel="nofollow noopener" target="_blank">#paleontology</a> <a href="https://toad.social/tags/geology" class="mention hashtag" rel="nofollow noopener" target="_blank">#geology</a> <a href="https://toad.social/tags/FossilFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#FossilFriday</a> (h/t Marcus Brandel)<a href="https://www.eplocalnews.org/2025/05/21/giant-beaver-is-one-signature-away-from-becoming-minnesotas-state-fossil/" rel="nofollow noopener" translate="no" target="_blank">https://www.eplocalnews.org/2025/05/21/giant-beaver-is-one-signature-away-from-becoming-minnesotas-state-fossil/</a>

Adam S. SmithRearing Diplodocus skeleton in the Dubai Mall in the UAE. Thanks to my sister who's on holiday there.<a href="https://sauropods.win/tags/FossilFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#FossilFriday</a> <a href="https://sauropods.win/tags/sauropod" class="mention hashtag" rel="nofollow noopener" target="_blank">#sauropod</a> <a href="https://sauropods.win/tags/dinosaurs" class="mention hashtag" rel="nofollow noopener" target="_blank">#dinosaurs</a> <a href="https://sauropods.win/tags/Diplodocus" class="mention hashtag" rel="nofollow noopener" target="_blank">#Diplodocus</a>

Historical BiologyFor <a href="https://mastodon.social/tags/FossilFriday" class="mention hashtag" rel="nofollow noopener" target="_blank">#FossilFriday</a>, we have a fossil from our editor John Whitlock.This is a skull of Diplodocus. This specimen is Carnegie Museum of Natural History (CM) 11161. It's probably the single most important specimen in terms of our understanding of diplodocoid (and maybe even sauropod) feeding biology, as it is essentially complete, largely undeformed, and has been studied so extensively 🦕

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