Lepidosauria (lizards, snakes, tuatara) is a globally distributed and ecologically important group of over 9,000 reptile species. The earliest fossil records are currently restricted to the Late Triassic and of
Several subsequent analyses using more recent methods have also recovered estimates from within the Permian, 289 and 265 Mya [36–39]. However, other molecular dating analyses provide dates in the Late or Middle Triassic with one as recent/shallow as 226 Mya [39–43]. This range of estimates...
The DNA sequences in primate C are significantly different from those of primate A. From this information, the biologist may infer that • Primates A and B are more closely related to each other than either is to primate C. What is the idea developed by Charles Lyell which ...
If vermiform microstructure is in fact the fossilized tissue of keratose sponges, the material described here would represent the oldest body-fossil evidence of animals known to date, and would provide the first physical evidence that animals emerged before the Neoproterozoic oxygenation event and ...
the earth’s two supercontinents―Laurasia in the north and Gondwanaland in the south―were in the process of pulling apart, cutting dinosaur populations off from each other and interrupting migratory patterns. The fossilized bones, found by paleontologist Doug Wolfe of the Mesa Southwest Museum in...
The rise of eukaryotic macroalgae in the late Mesoproterozoic to early Neoproterozoic was a critical development in Earth’s history that triggered dramatic changes in biogeochemical cycles and benthic habitats, ultimately resulting in ecosystems habitab
Secondly, we provide a detailed analysis of the roles international and national public finance has played in enabling two prominent petrochemical projects: namely the Sadara plant in Saudi Arabia and the Surgil plant in Uzbekistan. The cases are illustrative of the dynamics of state interest and ...
Based on the absence of bennettitaleans and rarity of Ginkgo, a Turonian or slightly younger age is inferred, making the Pitt Island assemblage the first Turonian plant macrofossils documented from New Zealand. The fossils provide a window into southern high-latitude (polar) vegetation of the ...
While pelagornithid or ‘bony-toothed’ bird fossils representing multiple species are known from Antarctica, a new dentary fragment of a pelagornithid bird from the middle Eocene Submeseta Formation on Seymour Island, Antarctica represents a species wit
35. The proportion of each phase is controlled by the environmental conditions prevailing, with the formation of Ni-sulfide precipitation enhanced by sulphidic conditions and the incorporation within the organic fraction enhanced in non-sulphidic, anoxic conditions35. Raman spectra do not evidence ...