The coelurosaur theropods of the Romualdo formation, early Cretaceous (Aptian) of Brazil: Santanaraptor placidus meets Mirischia asymmetrica - Delcourt - The Anatomical Record - Wiley Online Library anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
The coelurosaur theropods of the Romualdo formation, early Cretaceous (Aptian) of Brazil: Santanaraptor placidus meets Mirischia asymmetrica
The upper carbonate concretion levels of the Romualdo Formation (Aptian, Brazil) have yielded several theropod dinosaur remains, including spinosaurids and the coelurosaurs Santanaraptor placidus and....
anatomypubs.onlinelibrary.wiley.com
November 18, 2025 at 4:35 PM
The coelurosaur theropods of the Romualdo formation, early Cretaceous (Aptian) of Brazil: Santanaraptor placidus meets Mirischia asymmetrica - Delcourt - The Anatomical Record - Wiley Online Library anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
The coelurosaur theropods of the Romualdo formation, early Cretaceous (Aptian) of Brazil: Santanaraptor placidus meets Mirischia asymmetrica
Illustration by Guilherme Gehr
anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
Illustration by Guilherme Gehr
anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
November 18, 2025 at 4:30 PM
The coelurosaur theropods of the Romualdo formation, early Cretaceous (Aptian) of Brazil: Santanaraptor placidus meets Mirischia asymmetrica
Illustration by Guilherme Gehr
anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
Illustration by Guilherme Gehr
anatomypubs.onlinelibrary.wiley.com/doi/10.1002/...
1/3🧪⚒️
Before birds ruled the skies, pterosaurs did. A newly described Australian species — Haliskia peterseni — offers a fresh look at how these ancient reptiles once soared over the Early Cretaceous seas, revealing more about flight, evolution, and life in a vanished world.
Before birds ruled the skies, pterosaurs did. A newly described Australian species — Haliskia peterseni — offers a fresh look at how these ancient reptiles once soared over the Early Cretaceous seas, revealing more about flight, evolution, and life in a vanished world.
November 10, 2025 at 6:09 PM
1/3🧪⚒️
Before birds ruled the skies, pterosaurs did. A newly described Australian species — Haliskia peterseni — offers a fresh look at how these ancient reptiles once soared over the Early Cretaceous seas, revealing more about flight, evolution, and life in a vanished world.
Before birds ruled the skies, pterosaurs did. A newly described Australian species — Haliskia peterseni — offers a fresh look at how these ancient reptiles once soared over the Early Cretaceous seas, revealing more about flight, evolution, and life in a vanished world.
#FossilFriday This morning we were shown a Ruby Ranch wood site preserving insect frass (poop). More importantly the site looks like extremely rare pollen site near Aptian-Albian boundary...fingers crossed. Very promising..screen wash for micros..too... @utahpaleo-ufop.bsky.social
November 8, 2025 at 12:27 AM
#FossilFriday This morning we were shown a Ruby Ranch wood site preserving insect frass (poop). More importantly the site looks like extremely rare pollen site near Aptian-Albian boundary...fingers crossed. Very promising..screen wash for micros..too... @utahpaleo-ufop.bsky.social
The earliest appearance of gigantic lamniform #sharks has now been pushed back by ~15 Ma (upper Aptian, ~115 Ma) with the discovery of enormous cardabiodontid shark remains from northern Australia.🦈🧪
www.nature.com/articles/s42...
www.nature.com/articles/s42...
Early gigantic lamniform marks the onset of mega-body size in modern shark evolution - Communications Biology
The earliest appearance of mega-body size in sharks is pushed back by 15 million years with the discovery of new fossils from Northern Australia. Using a comprehensive dataset of living sharks to esti...
www.nature.com
October 27, 2025 at 11:38 PM
The earliest appearance of gigantic lamniform #sharks has now been pushed back by ~15 Ma (upper Aptian, ~115 Ma) with the discovery of enormous cardabiodontid shark remains from northern Australia.🦈🧪
www.nature.com/articles/s42...
www.nature.com/articles/s42...
Orca sized lamniform sharks from the Aptian of Australia:
"Our results show that mega-body size is an ancient lamniform trait, with the Australian cardabiodontid being around 6–8 m and over 3 tons."
"Our results show that mega-body size is an ancient lamniform trait, with the Australian cardabiodontid being around 6–8 m and over 3 tons."
October 26, 2025 at 8:51 PM
Orca sized lamniform sharks from the Aptian of Australia:
"Our results show that mega-body size is an ancient lamniform trait, with the Australian cardabiodontid being around 6–8 m and over 3 tons."
"Our results show that mega-body size is an ancient lamniform trait, with the Australian cardabiodontid being around 6–8 m and over 3 tons."
Reptilia, Dinosauria, Saurischia, Theropoda, Spinosauridae, and Baryonychinae. It is one of the youngest baryonychines known and the fifth spinosaurid found in the Iberian Peninsula. Living during the Cretaceous Period, Early/Lower Cretaceous Epoch, Aptian Age 121.4 - 113 million years ago.
October 17, 2025 at 9:55 PM
Reptilia, Dinosauria, Saurischia, Theropoda, Spinosauridae, and Baryonychinae. It is one of the youngest baryonychines known and the fifth spinosaurid found in the Iberian Peninsula. Living during the Cretaceous Period, Early/Lower Cretaceous Epoch, Aptian Age 121.4 - 113 million years ago.
Welcome back to #fossilfriday
Here is the fresh water Dastilbe elongatus. This specimen comes from the Lower Cretaceous (Aptian-Albian) Santana Formation in Serra de Araipe, Brazil. The Santana Formation is well known for its exquisite preservation of pterosaurs fossils.
Here is the fresh water Dastilbe elongatus. This specimen comes from the Lower Cretaceous (Aptian-Albian) Santana Formation in Serra de Araipe, Brazil. The Santana Formation is well known for its exquisite preservation of pterosaurs fossils.
October 10, 2025 at 4:37 PM
Welcome back to #fossilfriday
Here is the fresh water Dastilbe elongatus. This specimen comes from the Lower Cretaceous (Aptian-Albian) Santana Formation in Serra de Araipe, Brazil. The Santana Formation is well known for its exquisite preservation of pterosaurs fossils.
Here is the fresh water Dastilbe elongatus. This specimen comes from the Lower Cretaceous (Aptian-Albian) Santana Formation in Serra de Araipe, Brazil. The Santana Formation is well known for its exquisite preservation of pterosaurs fossils.
Jiandong Huang, Xuri Wang, Andrea Cau, Lei Mao, Yichuan Liu & Yang Wang (2025)
A new euornithine from the Lower Cretaceous (Aptian) of China reveals the first radiation of fish-eating birds
Cretaceous Research 106244
doi: doi.org/10.1016/j.cr...
www.sciencedirect.com/science/arti...
A new euornithine from the Lower Cretaceous (Aptian) of China reveals the first radiation of fish-eating birds
Cretaceous Research 106244
doi: doi.org/10.1016/j.cr...
www.sciencedirect.com/science/arti...
doi.org
September 26, 2025 at 4:21 PM
Jiandong Huang, Xuri Wang, Andrea Cau, Lei Mao, Yichuan Liu & Yang Wang (2025)
A new euornithine from the Lower Cretaceous (Aptian) of China reveals the first radiation of fish-eating birds
Cretaceous Research 106244
doi: doi.org/10.1016/j.cr...
www.sciencedirect.com/science/arti...
A new euornithine from the Lower Cretaceous (Aptian) of China reveals the first radiation of fish-eating birds
Cretaceous Research 106244
doi: doi.org/10.1016/j.cr...
www.sciencedirect.com/science/arti...
In the background, other marine fauna from the upper Aptian layers of the Paja Formation (Association 3 of Benavides-Cabra et al., 2023), such as a pliosaur, 𝘔𝘶𝘪𝘴𝘤𝘢𝘴𝘢𝘶𝘳𝘶𝘴 𝘤𝘢𝘵𝘩𝘦𝘵𝘪 and 𝘊𝘢𝘭𝘭𝘢𝘸𝘢𝘺𝘢𝘴𝘢𝘶𝘳𝘶𝘴 𝘤𝘰𝘭𝘰𝘮𝘣𝘪𝘦𝘯𝘴𝘪𝘴, complete the scene.
September 23, 2025 at 3:52 PM
In the background, other marine fauna from the upper Aptian layers of the Paja Formation (Association 3 of Benavides-Cabra et al., 2023), such as a pliosaur, 𝘔𝘶𝘪𝘴𝘤𝘢𝘴𝘢𝘶𝘳𝘶𝘴 𝘤𝘢𝘵𝘩𝘦𝘵𝘪 and 𝘊𝘢𝘭𝘭𝘢𝘸𝘢𝘺𝘢𝘴𝘢𝘶𝘳𝘶𝘴 𝘤𝘰𝘭𝘰𝘮𝘣𝘪𝘦𝘯𝘴𝘪𝘴, complete the scene.
Un nuevo Protolamna ricaurtei
Illustrated for: Cristian D. Benavides-Cabra, José A. Narváez-Rincón, Daniel E. Pomar
Made to go with the study published last week describing a new specimen of 𝘗𝘳𝘰𝘵𝘰𝘭𝘢𝘮𝘯𝘢 𝘳𝘪𝘤𝘢𝘶𝘳𝘵𝘦𝘪 Carrillo Briceño et al., 2019.
Illustrated for: Cristian D. Benavides-Cabra, José A. Narváez-Rincón, Daniel E. Pomar
Made to go with the study published last week describing a new specimen of 𝘗𝘳𝘰𝘵𝘰𝘭𝘢𝘮𝘯𝘢 𝘳𝘪𝘤𝘢𝘶𝘳𝘵𝘦𝘪 Carrillo Briceño et al., 2019.
September 23, 2025 at 3:52 PM
Un nuevo Protolamna ricaurtei
Illustrated for: Cristian D. Benavides-Cabra, José A. Narváez-Rincón, Daniel E. Pomar
Made to go with the study published last week describing a new specimen of 𝘗𝘳𝘰𝘵𝘰𝘭𝘢𝘮𝘯𝘢 𝘳𝘪𝘤𝘢𝘶𝘳𝘵𝘦𝘪 Carrillo Briceño et al., 2019.
Illustrated for: Cristian D. Benavides-Cabra, José A. Narváez-Rincón, Daniel E. Pomar
Made to go with the study published last week describing a new specimen of 𝘗𝘳𝘰𝘵𝘰𝘭𝘢𝘮𝘯𝘢 𝘳𝘪𝘤𝘢𝘶𝘳𝘵𝘦𝘪 Carrillo Briceño et al., 2019.
Skeletal reconstruction of Zavacephale rinpoche holotype MPC-D 100/1209.
Scale bars are 1 m and 5 cm x 5 cm.
Scale bars are 1 m and 5 cm x 5 cm.
September 18, 2025 at 1:26 AM
Skeletal reconstruction of Zavacephale rinpoche holotype MPC-D 100/1209.
Scale bars are 1 m and 5 cm x 5 cm.
Scale bars are 1 m and 5 cm x 5 cm.
A new neosuchian crocodyliform from the Lower Cretaceous (Aptian–Albian) Holly Creek Formation of southwest Arkansas and its implications on the relationships of Goniopholididae: Journal of Vertebrate Paleontology: Vol 0, No 0 - Get Access www.tandfonline.com/doi/full/10....
A new neosuchian crocodyliform from the Lower Cretaceous (Aptian–Albian) Holly Creek Formation of southwest Arkansas and its implications on the relationships of Goniopholididae
A new species of neosuchian crocodyliform, Paarthurnax holliensis gen. et sp. nov., is herein described based on a nearly complete skull from the Lower Cretaceous (Aptian–Albian) Holly Creek Format...
www.tandfonline.com
September 15, 2025 at 4:34 PM
A new neosuchian crocodyliform from the Lower Cretaceous (Aptian–Albian) Holly Creek Formation of southwest Arkansas and its implications on the relationships of Goniopholididae: Journal of Vertebrate Paleontology: Vol 0, No 0 - Get Access www.tandfonline.com/doi/full/10....
Cretaceous tetrapod burrow from Aptian eolian deposits of Southeast Brazil: Ichnos: Vol 0, No 0 - Get Access www.tandfonline.com/doi/full/10....
Cretaceous tetrapod burrow from Aptian eolian deposits of Southeast Brazil
This paper describes a tetrapod burrow from the Cretaceous Três Barras Formation (Sanfranciscana Basin, Brazil). The burrow preserved in aeolian sandstone has as a lateral cross-section, displaying...
www.tandfonline.com
September 14, 2025 at 1:39 PM
Cretaceous tetrapod burrow from Aptian eolian deposits of Southeast Brazil: Ichnos: Vol 0, No 0 - Get Access www.tandfonline.com/doi/full/10....
100 million year old silicified conifer trunks from the Castrillo de la Reina Formation (Barremian/Aptian).
On display outside Museo Nacional de Ciencias Naturales, Madrid.
#FossilFriday 🌏⚒🔬🧪🌲🌱
On display outside Museo Nacional de Ciencias Naturales, Madrid.
#FossilFriday 🌏⚒🔬🧪🌲🌱
September 12, 2025 at 8:28 AM
100 million year old silicified conifer trunks from the Castrillo de la Reina Formation (Barremian/Aptian).
On display outside Museo Nacional de Ciencias Naturales, Madrid.
#FossilFriday 🌏⚒🔬🧪🌲🌱
On display outside Museo Nacional de Ciencias Naturales, Madrid.
#FossilFriday 🌏⚒🔬🧪🌲🌱
#geoubcsic Decapod fauna from the lower Aptian in the Valencian sector of the Maestrat Basin (NE Iberia). Ossó, A; Artal, P; ... GEOLOGICA ACTA 23 [2025] doi.org/10.1344/GeologicaActa2025.23.18
September 8, 2025 at 11:04 AM
#geoubcsic Decapod fauna from the lower Aptian in the Valencian sector of the Maestrat Basin (NE Iberia). Ossó, A; Artal, P; ... GEOLOGICA ACTA 23 [2025] doi.org/10.1344/GeologicaActa2025.23.18
Further along the coast to the east there’s some nice Albian sandstone and marl, sandwiched between Cenomanian and Aptian strata as part of a big syncline.
Lovely sedimentary structures and some cute trace fossils - mostly Thalassinoides.
#fossilfriday
Lovely sedimentary structures and some cute trace fossils - mostly Thalassinoides.
#fossilfriday
September 5, 2025 at 4:29 PM
Further along the coast to the east there’s some nice Albian sandstone and marl, sandwiched between Cenomanian and Aptian strata as part of a big syncline.
Lovely sedimentary structures and some cute trace fossils - mostly Thalassinoides.
#fossilfriday
Lovely sedimentary structures and some cute trace fossils - mostly Thalassinoides.
#fossilfriday
A large lamniform shark from the Aptian of Villa de Leiva (Boyacá, Colombia), based on the first Lower Cretaceous shark specimen preserving both teeth and vertebrae
sciencedirect.com/science/arti...
sciencedirect.com/science/arti...
August 29, 2025 at 3:53 AM
A large lamniform shark from the Aptian of Villa de Leiva (Boyacá, Colombia), based on the first Lower Cretaceous shark specimen preserving both teeth and vertebrae
sciencedirect.com/science/arti...
sciencedirect.com/science/arti...
Use creativity in designing your stratigraphic figures! For this one (in McDavid and Thomas 2025), I sampled color values from pictures of rocks from the Patuxent, Arundel, and Patapsco Formations, and then extrapolated the trend forward for the Raritan.
August 24, 2025 at 4:28 AM
Use creativity in designing your stratigraphic figures! For this one (in McDavid and Thomas 2025), I sampled color values from pictures of rocks from the Patuxent, Arundel, and Patapsco Formations, and then extrapolated the trend forward for the Raritan.
Source for this figure is: Frey, E.; Martill, D.M. (1994). "A new Pterosaur from the Crato Formation (Lower Cretaceous, Aptian) of Brazil". Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 194 (2–3): 379–412.
A description of Arthurdactylus conan-doylei, yes you've read that right.
A description of Arthurdactylus conan-doylei, yes you've read that right.
August 13, 2025 at 3:02 PM
Source for this figure is: Frey, E.; Martill, D.M. (1994). "A new Pterosaur from the Crato Formation (Lower Cretaceous, Aptian) of Brazil". Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 194 (2–3): 379–412.
A description of Arthurdactylus conan-doylei, yes you've read that right.
A description of Arthurdactylus conan-doylei, yes you've read that right.
New published manuscript: #Decapod #fauna from the lower Aptian in the Valencian sector of the Maestrat Basin (NE Iberia) by À. Ossó et al.
Link: revistes.ub.edu/index.php/GE...
Link: revistes.ub.edu/index.php/GE...
July 30, 2025 at 12:16 PM
New published manuscript: #Decapod #fauna from the lower Aptian in the Valencian sector of the Maestrat Basin (NE Iberia) by À. Ossó et al.
Link: revistes.ub.edu/index.php/GE...
Link: revistes.ub.edu/index.php/GE...
First report of neosuchian remains in Aptian–Albian marine deposits of southeastern France🔓
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
First report of neosuchian remains in Aptian–Albian marine deposits of southeastern France
The European fossil record of crocodylomorphs during the Cretaceous is indubitably skewed towards the lowermost and uppermost strata. Neosuchian remai…
www.sciencedirect.com
July 24, 2025 at 4:51 PM
First report of neosuchian remains in Aptian–Albian marine deposits of southeastern France🔓
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Around extinction events, the shape of shells of certain groups becomes simpler. It's a sort of austerity measure to reduce the energy cost associated with producing a shell. Might be something we need to keep an eye out for in marine organisms now. 🧪🌊
Link: www.nature.com/articles/s41...
Link: www.nature.com/articles/s41...
July 20, 2025 at 6:54 AM
Around extinction events, the shape of shells of certain groups becomes simpler. It's a sort of austerity measure to reduce the energy cost associated with producing a shell. Might be something we need to keep an eye out for in marine organisms now. 🧪🌊
Link: www.nature.com/articles/s41...
Link: www.nature.com/articles/s41...
Aptian megaparrots.
Could be fascinating to learn about their role in seed dispersal and coevolution with early Cretaceous angiosperms. Stay tuned …
Could be fascinating to learn about their role in seed dispersal and coevolution with early Cretaceous angiosperms. Stay tuned …
Amazing, some pterosaurs (Sinopterus atavismus) were (at least partially) herbivorous!
🧪 ⚒️ #Paleobio #Geology #EvoBio #Macroecology
🧪 ⚒️ #Paleobio #Geology #EvoBio #Macroecology
July 1, 2025 at 8:54 PM
Aptian megaparrots.
Could be fascinating to learn about their role in seed dispersal and coevolution with early Cretaceous angiosperms. Stay tuned …
Could be fascinating to learn about their role in seed dispersal and coevolution with early Cretaceous angiosperms. Stay tuned …