Journal
JOURNAL OF PALEONTOLOGY
Volume 82, Issue 2, Pages 362-371Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1666/06-131.1
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Seventy-three species of stenolaemate bryozoans are documented worldwide from the Triassic. Stage-level diversity and paleo-geographical analyses reveal that the recovery of bryozoans following the end-Permian mass extinction was delayed until the Middle Triassic. Early Triassic bryozoans faunas, dominated by members of the Order Trepostomida, were depauperate and geographically restricted. Bryozoan diversity increased during the Middle Triassic and diversity peaked in the Carman (early Late Triassic). High extinction rates throughout the Late Triassic led to the extinction of all stenolaemate orders except the Cyclostomida by the end of the Triassic. Comparisons between global carbonate rock volume, outcrop surface area, and bryozoan diversity indicate that the documented diversity pattern for bryozoans may have been related, in part, to the availability of carbonate environments during the Triassic.
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