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Speciation and stasis in marine Ostracoda: Climatic modulation of evolution

Science

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Abstract

Morphologic and paleozoogeographic analysis of Cenozoic marine Ostracoda from the Atlantic, Caribbean, and Pacific indicates that climatic change modulates evolution by disrupting long-term stasis and catalyzing speciation during sustained, unidirectional climatic transitions and, conversely, by maintaining morphologic stasis during rapid, high-frequency climatic osculations. In the middle Pliocene, 4 to 3 million years ago, at least six new species of Puriana suddenly appeared as the Isthmus of Panama closed, changing oceanographic circulation and global climate. Since then morphologic stasis has characterized ancestral and descendant species during many glacial-interglacial cycles. The frequency and duration of climatic events have more impact on ostracode evolution than the magnitude of climatic changes.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Speciation and stasis in marine Ostracoda: Climatic modulation of evolution
Series title:
Science
Volume
227
Issue:
4682
Year Published:
1985
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
60
Last page:
63
Number of Pages:
4