Brontops
@brontops.bsky.social
Ornithischian dinosaurs of the world...and other stuff
Reposted by Brontops
Reavaliação do “troodontídeo” norte-americano do Cretáceo Inicial Geminiraptor suarezarum como um terizinossauro e evolução em mosaico da maxila dos celurossauros journals.plos.org/plosone/arti...
Reassessment of the Early Cretaceous North American “troodontid” Geminiraptor suarezarum as a therizinosaurian and mosaic evolution of coelurosaurian maxillae
The only recorded member of the bird-like Troodontidae from Early Cretaceous North America is Geminiraptor suarezarum, known from an isolated maxilla recovered from the Suarez Site bonebed of the basa...
journals.plos.org
September 30, 2026 at 7:28 PM
Reavaliação do “troodontídeo” norte-americano do Cretáceo Inicial Geminiraptor suarezarum como um terizinossauro e evolução em mosaico da maxila dos celurossauros journals.plos.org/plosone/arti...
Reposted by Brontops
Prováveis Fósseis de Paravianos do Barremiano da Bacia Lusitana: Implicações para a Diversidade Europeia de Terópodes do Cretáceo Inicial www.mdpi.com/2813-6284/4/...
www.mdpi.com
September 30, 2026 at 5:06 PM
Prováveis Fósseis de Paravianos do Barremiano da Bacia Lusitana: Implicações para a Diversidade Europeia de Terópodes do Cretáceo Inicial www.mdpi.com/2813-6284/4/...
Reposted by Brontops
New Cretaceous bird reported from Australia, Tenuicruris piscanexum! I was hoping my coauthors' & my 2023 study reporting a variety of Early Cretaceous bird tracks in Australia would be followed by bird body-fossil discoveries reflecting that diversity. 🧪🪨🐦🇦🇺
www.tandfonline.com/doi/full/10....
www.tandfonline.com/doi/full/10....
Tenuicruris piscanexum, a new addition to Australia’s rare Cretaceous bird fossils
This study describes Tenuicruris piscanexum, gen. et sp. nov., the second Cretaceous bird named from Australia, based on a well-preserved tibiotarsus. Detailed morphological analysis and phylogenet...
www.tandfonline.com
September 30, 2026 at 6:22 PM
New Cretaceous bird reported from Australia, Tenuicruris piscanexum! I was hoping my coauthors' & my 2023 study reporting a variety of Early Cretaceous bird tracks in Australia would be followed by bird body-fossil discoveries reflecting that diversity. 🧪🪨🐦🇦🇺
www.tandfonline.com/doi/full/10....
www.tandfonline.com/doi/full/10....
Reposted by Brontops
Out today: We show that Westlothiana lizziae or "Lizzie," described 35 years ago as the world's oldest reptile - is not a stem amniote at all, but a stem tetrapod.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
September 30, 2026 at 3:15 PM
Out today: We show that Westlothiana lizziae or "Lizzie," described 35 years ago as the world's oldest reptile - is not a stem amniote at all, but a stem tetrapod.
www.nature.com/articles/s41...
www.nature.com/articles/s41...
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
August 6, 2026 at 11:47 PM
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
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
August 6, 2026 at 10:55 PM
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
July 7, 2026 at 10:04 PM
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/...
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/...
July 1, 2026 at 7:25 PM
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/...
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/...
Reposted by Brontops
Happy #FossilFriday!
It's Hell Creek time
Maybe I'll find more of this mystery critter when I'm out in the wilds.
It's Hell Creek time
Maybe I'll find more of this mystery critter when I'm out in the wilds.
June 12, 2026 at 10:24 PM
Happy #FossilFriday!
It's Hell Creek time
Maybe I'll find more of this mystery critter when I'm out in the wilds.
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/...
June 18, 2026 at 10:11 PM
The paper describing Changzhousaurus (previously missing various pictures ) has been replaced by an updated version www.vertpala.ac.cn/EN/10.19615/...
Reposted by Brontops
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...
www.nature.com
February 25, 2026 at 7:16 PM
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
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
February 13, 2026 at 10:33 PM
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
Reposted by Brontops
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).
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).
February 6, 2026 at 4:07 PM
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).
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).
Reposted by Brontops
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.
February 6, 2026 at 3:55 PM
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.
February 7, 2026 at 12:06 AM
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...
…
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...
…
December 23, 2025 at 5:12 PM
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...
…
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...
December 17, 2025 at 12:22 PM
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...
Reposted by Brontops
Latest paper in the Lance Grande volume is out! Several more are at proof stage so should be appearing soon.
New possible stem-falcon Masillaraptor buchheimi: deepblue.lib.umich.edu/items/616a40... 🪶🧪 (📷Li et al.)
November 29, 2025 at 5:51 PM
Latest paper in the Lance Grande volume is out! Several more are at proof stage so should be appearing soon.
Reposted by Brontops
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...
www.tandfonline.com
November 30, 2025 at 7:10 PM
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....
Reposted by Brontops
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
November 24, 2025 at 9:55 PM
A região occipital do Amargasaurus (Sauropoda, Dicraeosauridae): reconstrução das inserções musculares craniocervicais, com comentários sobre estratégia alimentar onlinelibrary.wiley.com/doi/10.1111/...
Reposted by Brontops
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...
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...
November 24, 2025 at 6:55 PM
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...
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
November 24, 2025 at 9:09 PM
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
Reposted by Brontops
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. 🦕🧪
Definitely not Pachycephalosaurus, can't place it on a ceratopsian either. 🦕🧪
July 18, 2025 at 3:29 PM
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. 🦕🧪
Definitely not Pachycephalosaurus, can't place it on a ceratopsian either. 🦕🧪