#cenomanian — Public Fediverse posts

Discovery of rare new #fossil sheds light on #NewZealand's extinct dolphin-like reptiles https://phys.org/news/2025-01-discovery-rare-fossil-zealand-extinct.html

A platypterygiid #ichthyosaur from the #Cenomanian of central New Zealand https://www.tandfonline.com/doi/full/10.1080/02724634.2024.2408391

"This #discovery is particularly exciting because the specimen is about 98 million years old. This is about four million years before the final #extinction of #ichthyosaurs, which makes it one of the youngest semi-complete ichthyosaur skeletons known."

#GlobalWarming caused widespread ocean #anoxia 93 million years ago, #DeepSea sediments research suggests
https://phys.org/news/2024-01-global-widespread-ocean-anoxia-million.html

#Warming drove the expansion of #MarineAnoxia in the equatorial #Atlantic during the #Cenomanian leading up to Oceanic #Anoxic Event 2 https://cp.copernicus.org/articles/19/2569/2023/

"During such scenarios, organic matter is buried at an elevated rate, producing distinctive layers of black #shale in the #geological record, which are depleted in the isotopically-heavier #carbon-13"

#NewSpecies of #Sauropod #Dinosaur Discovered in Argentina
https://www.sci.news/paleontology/sidersaura-marae-12594.html

The last of the oldies: a basal rebbachisaurid (#Sauropoda, Diplodocoidea) from the early Late #Cretaceous (#Cenomanian–#Turonian) of #Patagonia, #Argentina https://www.tandfonline.com/doi/full/10.1080/08912963.2023.2297914

"The presence of an early species at Cenomanian-Turonian times, so close to the #extinction of the group, implies that the evolutionary history of #Rebbachisauridae was more complex than previously thought"

#NewSpecies of Ornithopod Dinosaur Identified in #Texas https://www.sci.news/paleontology/ampelognathus-coheni-12381.html

The first small-bodied ornithopod dinosaur from the #Lewisville Formation (middle #Cenomanian) of Texas https://www.tandfonline.com/doi/full/10.1080/02724634.2023.2257238

“The #LewisvilleFormation preserves the most diverse terrestrial #fossil assemblage known from #Appalachia, but remains of small #ornithischian #dinosaurs had been conspicuously absent from it. Ampelognathus coheni is the first small-bodied #ornithopod #dinosaur discovered there"