letters to nature 6. Wysession, M. et al. The Core-Mantle Boundary Region 273–298 (American Geophysical Union, Washington, DC, 1998).

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• Phyla
• Temnospondyli
• Nigerpeton
• Permian
• Tetrapod
• Dvinosauria
• Saharastega
• Dicynodon
• Triassic
• Temnospondyls
• Paleozoology
• Paleontology