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Abstract
Biostratigraphic and morphometric analyses of calcareous nannofossil assemblages from one outcrop and two cored sections of lower Eocene sediments reveal the presence of two new species: Tribrachiatus lunatus sp. nov., and Tribrachiatus absidatus sp. nov. Differences between the new species and Tribrachiatus orthostylus are discussed. The first occurrence of the two new species is just below the calcareous nannofossil Zone NP11/NP12 boundary, close to the Chron 24r/23n boundary, and thus they are globally useful biostratigraphic markers.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Biostratigraphic and morphometric analyses of specimens from the calcareous nannofossil genus Tribrachiatus |
| Series title | Journal of Nannoplankton Research |
| Volume | 37 |
| Issue | 2-3 |
| Year Published | 2017 |
| Language | English |
| Publisher | Sheridan Press |
| Contributing office(s) | Eastern Geology and Paleoclimate Science Center |
| Description | 12 p. |
| First page | 177 |
| Last page | 188 |
| Google Analytic Metrics | Metrics page |