Heath Caldwell
@heathcaldwell.bsky.social
Montana State 2025
NCSU Paleo PhD student 🦖 🦕
NCSU Paleo PhD student 🦖 🦕
Reposted by Heath Caldwell
Happy #FossilFriday! Meet Brontotholus harmoni (MOR 480), a new pachycephalosaurid from the Cretaceous Two Medicine Formation of Montana. Named after former MOR Chief Preparator Bob Harmon. Bronotoholus was named this week in a @ZoolJLinnSoc paper by MSU alumnus @doublebeam and colleagues.
October 10, 2025 at 10:31 PM
Happy #FossilFriday! Meet Brontotholus harmoni (MOR 480), a new pachycephalosaurid from the Cretaceous Two Medicine Formation of Montana. Named after former MOR Chief Preparator Bob Harmon. Bronotoholus was named this week in a @ZoolJLinnSoc paper by MSU alumnus @doublebeam and colleagues.
Reposted by Heath Caldwell
Just got word that the dean of Mongolian vertebrate paleontology, Rinchen Barsbold, passed away at age 90. A pivotal figure in the history of paleontology in his nation, and of the study of theropods.
August 29, 2025 at 10:15 AM
Just got word that the dean of Mongolian vertebrate paleontology, Rinchen Barsbold, passed away at age 90. A pivotal figure in the history of paleontology in his nation, and of the study of theropods.
Reposted by Heath Caldwell
Happy #FossilFriday! Teleoceras (MOR 2034) is an early rhino from the Miocene (~8 mya). It had a barrel-like build with short legs, similar to a modern hippopotamus. It’s high-crowned molars suggest it primarily consumed low-lying plants.
June 14, 2025 at 2:57 AM
Happy #FossilFriday! Teleoceras (MOR 2034) is an early rhino from the Miocene (~8 mya). It had a barrel-like build with short legs, similar to a modern hippopotamus. It’s high-crowned molars suggest it primarily consumed low-lying plants.
Reposted by Heath Caldwell
Happy #FossilFriday! This Tenontosaurus skull (MOR 682) was recently taken off exhibit for study by visiting researchers to MOR. Before going back on display, fossil preparators will thoroughly evaluate the condition of and conserve the specimen.
June 6, 2025 at 8:10 PM
Happy #FossilFriday! This Tenontosaurus skull (MOR 682) was recently taken off exhibit for study by visiting researchers to MOR. Before going back on display, fossil preparators will thoroughly evaluate the condition of and conserve the specimen.
Reposted by Heath Caldwell
Every day is #DinosaurDay for us, but here's an old friend, a young Corythosaurus, flirting with that difficult transition to adulthood, showing its brain endocast & expanding airway & sinuses within its narial crest. Published w/
@DavidEvans_ROM in 2009: bit.ly/3kh7fRG
@DavidEvans_ROM in 2009: bit.ly/3kh7fRG
June 1, 2025 at 8:46 PM
Every day is #DinosaurDay for us, but here's an old friend, a young Corythosaurus, flirting with that difficult transition to adulthood, showing its brain endocast & expanding airway & sinuses within its narial crest. Published w/
@DavidEvans_ROM in 2009: bit.ly/3kh7fRG
@DavidEvans_ROM in 2009: bit.ly/3kh7fRG
Reposted by Heath Caldwell
#TroodonFever continues:
Full article: Patterns of postcranial fusion in the emu (Dromaius novaehollandiae) and Cretaceous theropod dinosaur Troodon formosus www.tandfonline.com/doi/full/10....
Full article: Patterns of postcranial fusion in the emu (Dromaius novaehollandiae) and Cretaceous theropod dinosaur Troodon formosus www.tandfonline.com/doi/full/10....
Patterns of postcranial fusion in the emu (Dromaius novaehollandiae) and Cretaceous theropod dinosaur Troodon formosus
Skeletal fusion has been a widely used indicator of maturity for fossil vertebrate specimens, including non-avian dinosaurs. However, recent research has highlighted the potential variability in fu...
www.tandfonline.com
May 14, 2025 at 5:47 PM
#TroodonFever continues:
Full article: Patterns of postcranial fusion in the emu (Dromaius novaehollandiae) and Cretaceous theropod dinosaur Troodon formosus www.tandfonline.com/doi/full/10....
Full article: Patterns of postcranial fusion in the emu (Dromaius novaehollandiae) and Cretaceous theropod dinosaur Troodon formosus www.tandfonline.com/doi/full/10....
Reposted by Heath Caldwell
Chen, R., Wang, M., Dong, L. et al. Earliest short-tailed bird from the Late Jurassic of China. Nature 638, 441–448 (2025). doi.org/10.1038/s415...
Earliest short-tailed bird from the Late Jurassic of China - Nature
Two recently discovered bird fossils from the Late Jurassic Zhenghe Fauna demonstrate that highly derived bird-like features and the origin of birds appeared much earlier in the Jurassic period than p...
doi.org
February 12, 2025 at 4:51 PM
Chen, R., Wang, M., Dong, L. et al. Earliest short-tailed bird from the Late Jurassic of China. Nature 638, 441–448 (2025). doi.org/10.1038/s415...
Reposted by Heath Caldwell
Kimberley E. J. Chapelle, Christopher T. Griffin and Diego Pol (2025)
Growing with dinosaurs: a review of dinosaur reproduction and ontogeny
Biology Letters 21(1): 20240474
doi: doi.org/10.1098/rsbl...
royalsocietypublishing.org/doi/10.1098/...
Growing with dinosaurs: a review of dinosaur reproduction and ontogeny
Biology Letters 21(1): 20240474
doi: doi.org/10.1098/rsbl...
royalsocietypublishing.org/doi/10.1098/...
Growing with dinosaurs: a review of dinosaur reproduction and ontogeny | Biology Letters
Since the start of the twenty-first century, there has been a notable increase in annual publications focusing on dinosaur reproduction and ontogeny with researchers using these data to address a range of macroevolutionary questions about dinosaurs. ...
doi.org
January 15, 2025 at 4:07 PM
Kimberley E. J. Chapelle, Christopher T. Griffin and Diego Pol (2025)
Growing with dinosaurs: a review of dinosaur reproduction and ontogeny
Biology Letters 21(1): 20240474
doi: doi.org/10.1098/rsbl...
royalsocietypublishing.org/doi/10.1098/...
Growing with dinosaurs: a review of dinosaur reproduction and ontogeny
Biology Letters 21(1): 20240474
doi: doi.org/10.1098/rsbl...
royalsocietypublishing.org/doi/10.1098/...
Reposted by Heath Caldwell
Wow! Turns out that the giant allosaurid dinosaur Saurophaganax maximus from Oklahoma is actually in part a diplodocid sauropod (!) ... while the remaining bits that *are* theropod represent a new species of Allosaurus! That's ... that's a lot. 😳 journals.library.ualberta.ca/vamp/index.p... 🦖🧪
December 22, 2024 at 2:06 AM
Wow! Turns out that the giant allosaurid dinosaur Saurophaganax maximus from Oklahoma is actually in part a diplodocid sauropod (!) ... while the remaining bits that *are* theropod represent a new species of Allosaurus! That's ... that's a lot. 😳 journals.library.ualberta.ca/vamp/index.p... 🦖🧪
Reposted by Heath Caldwell
Published last week in our journal: Individual, ontogenetic, and phylogenetic variation in the dentition of hadrosaurids (Iguanodontia: Ornithischia) 🦷 🦖
December 2, 2024 at 11:00 AM
Published last week in our journal: Individual, ontogenetic, and phylogenetic variation in the dentition of hadrosaurids (Iguanodontia: Ornithischia) 🦷 🦖