The study uncovers the world’s most diverse collection of fossilized ascidian spicules, found in Bogutovo Selo near Ugljevik, Bosnia and Herzegovina, and dating back to the Middle Miocene.
A new specimen of the early ichthyosaur Chaohusaurus zhangjiawanensis from the Early Triassic of Hubei Province, China, confirms heterodonty in this species.
A comprehensive study by an international team of researchers found that the evolutionary trajectories of Triassic–Jurassic ichthyosaurs and eosauropterygians…
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