Biostratigraphic and morphometric analyses of specimens from the calcareous nannofossil genus Tribrachiatus

Journal of Nannoplankton Research
By: , and 

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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.

Additional publication details

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