11. The earliest marine reptiles arose in the Permian period during the Paleozoic era. 12. Poor quality fossil evidence suggests an origin in the Permian Period . 13. This genus is known from the Ordovician to the Permian periods . 14. But evidence for any such calamity in the Permian Period has been lacking. 15. The third extinction was about 245 million years ago, during the Permian Period . 16. Throughout the Permian period , the synapsids included the dominant carnivores and several important herbivores. 17. The "'Geology of Kansas "'encompasses the geologic history of the Pennsylvanian and Permian periods . 18. It lived in the Permian period , specifically the Wuchiapingian Stage. 19. They were large herbivores that flourished during the Permian period . 20. The evolutionary explosion that began in the Carboniferous ended in the ensuing Permian Period .
