Faculty Publications

Title

Accelerated rates of foraminiferal origination and extinction during the Late Paleozoic ice age

Document Type

Article

Journal/Book/Conference Title

Journal of Foraminiferal Research

Volume

38

Issue

1

First Page

74

Last Page

84

Abstract

Foraminifers experienced increased taxonomic diversity, increased rates of origination and extinction and shorter mean species durations during the Late Paleozoic ice age (LPIA) than during the immediately pre- and post-glacial intervals, a pattern opposite to that exhibited by brachiopods and other marine invertebrates. Much, but not all, of the increase in evolutionary rates can be attributed to the origin and rapid diversification of the fusulinoideans, a narrowly specialized group that was prone to high rates of extinction and speciation under the variable, cyclothemic conditions of he LPIA. Increased rates of evolution among non-fusulinoidean foraminifers during the LPIA also could be related in some way to glacioeustatically induced instability of neritic environments.

Original Publication Date

1-1-2008

DOI of published version

10.2113/gsjfr.38.1.74

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