The earliest known high-diversity tetrapods trackway assemblage, from mid-Tournaisian of Blue Beach, Canada, contains taxa that are notrepresented among the associated body fossils (for example, Temnospondyls). The Mansfield Group contains no known tetrapod body fossils. The earliest known amniote fossils had been found in Nova Scotia, Canada, and were dated to the mid-Carboniferous period, about…