Mosasaur
PDF | Routine maintenance and re-housing of the paleontological collections at the University of Colorado Museum of Natural History (UCM) pe
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Mosasaur
PDF | Routine maintenance and re-housing of the paleontological collections at the University of Colorado Museum of Natural History (UCM) pe
PDF | Routine maintenance and re-housing of the paleontological collections at the University of Colorado Museum of Natural History (UCM) pe
PDF | Routine maintenance and re-housing of the paleontological collections at the University of Colorado Museum of Natural History (UCM) pe
Prognathodon solvayi
PDF | While reporting on the mosasaurid fauna of the upper Demopolis Chalk of western Alabama and northeastern Mississippi, Derstler (1988)
Prognathodon solvayi by Carlos Espinosa
PDF | While reporting on the mosasaurid fauna of the upper Demopolis Chalk of western Alabama and northeastern Mississippi, Derstler (1988)
https://porphyrogennetos.substack.com/p/dvgs-2025
Rare fossils of the mosasaur Globidens alabamaensis — a 20 foot predator with strange, mushroom-shaped teeth — unearthed in northeastern Tex
Eremiasaurus heterodontus jaw
Halisaurine jaw
Newly Identified ‘Hell Chicken’ Species Helps Explain Time of the Dinosaurs
The species tells researchers that dinosaurs weren’t sliding toward extinction before the fateful asteroid hit.
Were dinosaurs already on their way out when an asteroid hit Earth 66 million years ago, ending the Cretaceous, the geologic period that started about 145 million years ago? It’s a question that has vexed paleontologists like us for more than 40 years. In the late 1970s, debate began about whether dinosaurs were at their peak or in decline before their big extinction. Scientists at that time noted that while dinosaur diversity seemed to have increased in the geologic stage that spanned 83.6 million to 71.2 million years ago, the number of species on the scene seemed to decrease during the last few million years of the Cretaceous. Some researchers have interpreted this pattern to mean that the asteroid that struck the Gulf of Mexico was simply the final blow for an already vulnerable group of animals. However, others have argued that what looks like a decrease in the diversity of dinosaurs may be an artifact of how hard it is to accurately count them. Fossil formations might preserve different dinosaurs more or less often based on factors like their favored environment and how easily their bodies fossilized there. The accessibility of various outcrops could influence what kinds of fossils researchers have so far found. These biases are a problem because fossils are what paleontologists must rely on to conclusively answer how healthy dinosaur populations were when the asteroid hit...
Read more: https://www.discovermagazine.com/the-sciences/newly-identified-hell-chicken-species-helps-explain-time-of-the-dinosaurs
Globidens
PDF | Here, we report on the important discovery of two well-preserved maxillae from the durophagous mosasaur Globidens alabamaensis Gilmore
Globidens
Globidens teeth
Globidens tooth
PDF | Here, we report on the important discovery of two well-preserved maxillae from the durophagous mosasaur Globidens alabamaensis Gilmore
Globidens Jaws
PDF | Here, we report on the important discovery of two well-preserved maxillae from the durophagous mosasaur Globidens alabamaensis Gilmore
Prognathodon currii teeth
Hemipristis tooth