Rodríguez-Borges, Airam, et al. "Ontogenetic variation in an ornithopod femur from the Upper Cretaceous of Argentina: Ornithopod femur ontogeny." Geologica Acta 24 (2026): 1-XXVIII. t.co/zw4j0PT1RX
Brontops
@brontops.bsky.social
Ornithischian dinosaurs of the world...and other stuff
For #fossilfriday the weird extra osteoderms in the second cervical ring of _Edmontonia_ AMNH 5665. These extra osteoderms nearly close the ring ventrally and are unique to this specimen among ankylosaurs. The specimen can be viewed in 3d here t.co/ORvOrpCTIE
A daily reminder that significant specimens are constantly being illegally trafficked. Right now, on eBay and various auction sites, one can find Chinese paravians and psittacosaurs, Burmese paravians, teeth and bones from Niger, and-in this instance-part of a Spicomellus
Zhengheornis buyu gen. et sp. nov. Wang et al. (2026) Jurassic avialan reveals stepwise evolution of bony tail in birds Science Advances 12(27): eaeb5202 DOI: 10.1126/sciadv.ae b5202 www.science.org/doi/10.1126/...
Happy #FossilFriday! It's Hell Creek time Maybe I'll find more of this mystery critter when I'm out in the wilds.
The paper describing Changzhousaurus (previously missing various pictures ) has been replaced by an updated version www.vertpala.ac.cn/EN/10.19615/...
Woah. Calamosaurus from the Wessex Formation reidentified as an alvarezsauroid... I'm reeling and certainly didn't see that one coming :) www.nature.com/articles/s41... #dinosaurs
Argentine fossil rewrites evolutionary history of a baffling dinosaur clade - Nature
A skeleton of the alvarezsauroid Alnashetri cerropoliciensis—representing a highly complete alvarezsauroid skeleton from South America—provides evidence on the evolution of the peculiar anatomy and mi...
nature.com
For #FossilFriday a panoply of the basal #ankylosaurid Liaoningosaurus, known by literally dozens of juvenile specimens. The largest specimens are around 50 cm #thyreophora #ornithischia
Maybe a bit late for web timing, but ehy, NEW PAPER ON #fossilfriday!!! I am proud to present you Haolong dongi gen. nov. sp. nov., a new hadrosauroid from the Early Cretaceous of China! The specimen, almost complete, is a juvenile iguanodontian from the Yixian Formation of the Barremian (125 Mya).
Really taken with Haolong dongi, out today from Jiandong Huang, Pascal Godefroit and team. Just submitted news article on it. An iguanodontian with abundant hollow spikes across the neck and body, projecting from among conventional basement scales, and with rows of plate-like scales along the tail.
Since it's #haolong day and #fossilfriday here's some #iguanodontian specimens from Liaoning, spanning from 40 cm to over 8 m, many preserved with soft tissue.
Manipulonyx, new WEIRD alvarezsaurid A.O. Averianov, A.V. Lopatin and A.A. Atuchin (2025) Forelimb structure and function in a new Late Cretaceous parvicursorine theropod dinosaur from Mongolia Proceedings of the Zoological Institute RAS 329(4): 382–408 www.zin.ru/journals/tru... …
Wang, L., Li, X., Wen, Q. et al. Gastroliths in hatchling Psittacosaurus show early dietary habits. Sci. China Earth Sci. (2025). link.springer.com/article/10.1...
Latest paper in the Lance Grande volume is out! Several more are at proof stage so should be appearing soon.
Alberta Claw@albertonykus.bsky.social · 9mo agoNew possible stem-falcon Masillaraptor buchheimi: deepblue.lib.umich.edu/items/616a40... 🪶🧪 (📷Li et al.)
Untangling the identity of Romualdo pterosaurs: ‘Cearadactylus atrox’ as a junior synonym of Brasileodactylus araripensis (Pterosauria, Anhangueridae): Historical Biology: Vol 0, No 0 - Get Access www.tandfonline.com/doi/full/10....
Untangling the identity of Romualdo pterosaurs: ‘Cearadactylus atrox’ as a junior synonym of Brasileodactylus araripensis (Pterosauria, Anhangueridae)
The Romualdo Formation (Aptian–Albian) of the Araripe Basin is renowned for its exceptional three-dimensional fossil preservation, including a rich pterosaur assemblage. One of such pterosaurs from...
tandfonline.com
A região occipital do Amargasaurus (Sauropoda, Dicraeosauridae): reconstrução das inserções musculares craniocervicais, com comentários sobre estratégia alimentar onlinelibrary.wiley.com/doi/10.1111/...
The occiput of Amargasaurus (Sauropoda, Dicraeosauridae): Reconstruction of the craniocervical muscular insertions with comments on feeding strategy
Sauropods achieved gigantism partly through neck elongation, but the role of soft tissues remains unclear. We reconstruct the craniocervical muscles of Amargasaurus cazaui (Lower Cretaceous, Argentin...
onlinelibrary.wiley.com
New paper alert! (My first!) This is a benchmark paper on all NPS fossils within the State of Utah through 2024. Loads of illustrations by me and pic by coauthors and collaborators. Open access, free to download! Thanks to all who made this possible! giw.utahgeology.org/giw/index.ph...
Skull roof elements of Tuojiangosaurus. The supraorbital (n.6)show and interesting pattern of conspicuous tubercles. While stegosaurs have often ornamentations in the shape of grooves and pits the supraorbital of T. vaguely recall the caputegulae of ankylosaurs #thyreophora
A little #FossilFriday mystery from the Hell Creek for you other experts. I found this in a bunch of pieces trailing down the outcrop. What is it? Smooth on the underside, horns. Sutures? Definitely not Pachycephalosaurus, can't place it on a ceratopsian either. 🦕🧪
I'm putting the new weird horned dinosaur that I found in Montana away, but wanted to compare it with the same bones from Princess Lumpybumps. I am surprised at how different they are, especially the fused frill lumps (episquamodals) in overall size and proportions. Can't wait to dig more ! 🧪
Does anyone have this ref? Nopcsa F (1925) Dinosaurierreste aus Siebenbürgen IV. Die Wirbelsäule von Rhabdodon und Orthomerus. Palaeontologica Hungarica 1: 273–304 Thanks!
Whooooaaaa, this is extremely neat! And spectropolarimetry (which is the best, and what we used in my first paper too!) is at its core 💙 In a nutshell: astronomers used the polarization of light to study the shape of a supernova explosion before it interacted with surrounding material. 🔭🧪
ESO@eso.org · 9mo agoFor the first time ever, astronomers have unveiled the shape of a supernova explosion just a day after detection, as the blast was breaking through the star’s surface. Achieved by our VLT, this feat will help us understand how massive stars die: https://www.eso.org/public/news/eso2520/ 🔭 🧪 ☄️
Forelimb morphology of the early short-tailed avialan theropod Confuciusornis: academic.oup.com/zoolinnean/a... 🪶🧪 (📷Duan et al.)
Sarcosaurus woodi, an early diverging averostran-line theropod from the Early Jurassic of Warwickshire, in the Warwickshire Museum offsite collections. #2025SVP
A new, exquisitely preserved skull of a basal neornithischian from the Morrison Fm www.youtube.com/watch?app=de...
M. W. Maisch, L. S. M. Maisch 2024 Neubewertung von „Plateosaurus“ ornatus von Huene, 1908 – ein früher Ornithischier (Dinosauria: Ornithischia) aus dem Rhätbonebed? Bd. 180 (2024): Jahreshefte der Gesellschaft für Naturkunde in Württemberg, 180. Jahrgang