This could also be a selection bias based on the nature of the selection events. Longer lived species for whatever reason (slower metabolism, ability to go dorm

This could also be a selection bias based on the nature of the selection events. Longer lived species for whatever reason (slower metabolism, ability to go dormant for long periods) may have had an edge for a period of time. Its important to not that there wasn't a sudden radiation based on these specific surviving species after these events either.