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A study on the diversification of non-avian dinosaurs, inferred from available dinosaur phylogenies, is published by Allen et al. (2024), who find it impossible to decisively conclude whether dinosaurs experienced a decline in diversity before the Cretaceous–Paleogene extinction event on the basis of available data, noting the impact of the ...
Doering et al. (2024) describe new fossil material of archosauromorph reptiles from the Niemeyer complex (Santa Maria Supersequence, Brazil), including the first records of a rhynchosaur (Teyumbaita sulcognathus), a saurischian dinosaur and a probable silesaurid from this locality, and interpret the rhynchosaur remains as indicating that the ...
Shapiro (2024) describes fossil material of Dzieduszyckia from the Devonian Slaven Chert (Nevada, United States), possibly indicative of the presence of a species distinct from D. sonora in Nevada, and interprets Dzieduszyckia as capable of survival in both seep and non-seep settings, which enabled it be primed for the Famennian biotic crises ...
Sigilmassasaurus (/ s iː dʒ ɪ l ˌ m ɑː s ə ˈ s ɔːr ə s / see-jil-MAH-sə-SOR-əs; "Sijilmassa lizard") is a controversial and dubious genus of spinosaurid dinosaur that lived approximately 100 to 94 million years ago during the Late Cretaceous Period in what is now northern Africa.
Massospondylus (/ ˌ m æ s oʊ ˈ s p ɒ n d ɪ l ə s / MASS-oh-spon-di-lus [1]) is a genus of sauropodomorph dinosaur from the Early Jurassic (Hettangian to Pliensbachian ages, ca. 200–183 million years ago). It was described by Sir Richard Owen in 1854 from remains discovered in South Africa, and is thus one of the first dinosaurs to have ...
A 2024 article co-authored by Sereno stated that the previous calculations by Sereno that were used to argue quadrupedality for Spinosaurus had erroneously shifted the center of mass in front of the hips. They instead suggested that the dinosaur fit the criteria of being a graviportal (or slow-moving) biped. [80] [81]
A study on the duration of Late Cretaceous megaherbivore dinosaur assemblage zones in the 100 m thick stratigraphic section exposed at Dinosaur Provincial Park (Alberta, Canada) is published by Eberth et al. (2023), who interpret their findings as indicating that the dinosaur assemblage zones in the studied section had duration time of ~600 ...
Han et al. (2022) establish a high-resolution geochronological framework for the fossil-rich Late Cretaceous sedimentary sequence in the Shanyang Basin (China), and interpret the fossil material from the studied specimens as indicative of sustained low dinosaur biodiversity in the studied area between ~68.2 and ~66.4 million years ago, and of a ...
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