Morphologic changes, most particularly in the size, shape, and arrangement of the cystiphragms, in four species of the ectoproct genus Prasopora Nicholson & Etheridge indicate an evolution of the ...

Actinocerid nautiloids from the Lhasai Formation in the Xainza region are studied systematically for the first time. The nautiloids are identified as Middle Ordovician in age based on stratigraphic ...

An unusually well-preserved "Marine Dwarf World" from 462 million years ago was found at Castle Bank, Wales by a team led by the Nanjing Institute of Geology and Palaeontology of the Chinese Academy ...

According to the study, the fossils date to the Middle Ordovician period and are considered among the oldest known horseshoe ...