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Message * Articles On Triassic Extinctions, including Triassicâ€"jurassic Extinction Event, Conodont, Cynognathus, Placerias, Orthoceras, Kannemeyeriidae, Kannemeyeria, Xenacanthus, Bellerophon (genus), Bellerophontidae, Placodont, Therocephalia - 1243228830 - 9781243228833