Speciation and stasis in marine Ostracoda: Climatic modulation of evolution
Science
By: T. M. Cronin
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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.
| 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 |
| Google Analytic Metrics | Metrics page |