Phanerozoic Diversity

Family Diversity Curve (Sepkoski 1984)

Richness Independent (non-equibrium extinctions)

Richness Dependent (productivity limited)

"Realistic"

Sepkoski, J.J.Jr. 1984. A kinetic model of Phanerozoic taxonomic
diversity. III. Post-Paleozoic marine diversity and the fossil record.
Paleobiology 10: 246-267.