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Pages 151-151

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From page 151...
... and by the massive expansion of tree ferns following the terminal 151 Westphalian extinctions. Tree ferns were cheaply constructed; had massive reproductive output, causing vast overrepresentation in the miospore record (Willard, 19931; produced small and widely dispersed isospores capable of founding a population from one spore; and underwent a major radiation in coal swamps and elastic lowlands during the late Westphalian and Stephanian.


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