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Unformatted text preview: (E. Dev. - Cret.) 6. Medium-large initial radiation to high diversity, followed by big drop in diversity at a mass extinction, followed by gradual recovery to lower diversity levels today - Articulate Brachiopods, Crinoids , Bryozoans (Camb. or E. Ord. - Rec.) 7. Small initial radiation, followed by gradual decline throughout the rest of the record to relict status today - Inarticulate Brachiopods , Horseshoe Crabs (Camb. - Rec.) 8. Small initial radiation, followed by surviving a mass extinction and radiating to much higher diversity continuing to the Recent - Echinoids (L. Ord. - Rec.) Back to Outline Main page...
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- Spring '08