WebMar 13, 2024 · Benjamin Kear and colleagues report the geologically oldest ichthyosaur fossils from ∼250 million-year-old marine deposits on Spitsbergen. These show that fully … WebApr 10, 2024 · New discoveries in the lower Popo Agie Formation (lower carbonate unit) of central Wyoming necessitated a reevaluation of USNM 494329 from the same unit, the only known hyperodapedontine rhynchosaur in western North America. Well known from Gondwanan deposits, hyperodapedontines appear to be restricted to the Carnian age …
Exceptionally preserved beetles in a Triassic ... - Current Biology
WebNov 4, 2024 · The Triassic is notable for the appearance of early members of the major extant tetrapod clades, and the addition of a eucynodont to the upper Blue Mesa Member assemblage, which also includes stem-anurans , lepidosaurs , dinosaurs and crocodylomorphs , underscores the importance of these strata as a window onto the … WebDec 19, 2024 · Biology in the Anthropocene: challenges and insights from young fossil records. Proc. Natl. Acad. Sci. USA. 2015; 112: 4922-4929 https: ... in the wake of the end … barbara gentleman
Earliest Triassic ichthyosaur fossils push back oceanic reptile …
WebApr 13, 2024 · Sphenothallus specimens were collected from thin, gray, laminated lime mudstones in the Kozja dnina Member of the Martuljek Limestone (Late Triassic). The Late Carnian (Tuvalian) age of the section that yielded the specimens is based on conodont assemblages ( Quadralella polygnathiformis Zone). WebDec 19, 2024 · Biology in the Anthropocene: challenges and insights from young fossil records. Proc. Natl. Acad. Sci. USA. 2015; 112: 4922-4929 https: ... in the wake of the end-Permian mass extinction. By the Middle Triassic, 5 million years later, ichthyosaurs evolved the large body sizes typical of dominant predators at the top of marine food ... 1. ^ Widmann, Philipp; Bucher, Hugo; Leu, Marc; et al. (2024). "Dynamics of the Largest Carbon Isotope Excursion During the Early Triassic Biotic Recovery". Frontiers in Earth Science. 8 (196): 196. Bibcode:2024FrEaS...8..196W. doi:10.3389/feart.2024.00196. 2. ^ McElwain, J. C.; Punyasena, S. W. (2007). "Mass extinction events and the plant fossil record". Trends in Ecology & Evolution. 22 (10): 548–557. doi:10.1016/j.tree.2007.09.003. PMID 17919771. barbara gentry