New Paleocene Calcareous Nannofossil Genera:

Davidbukrya, Mauriceblackia, Mulleria, Noelia and Senelia

Abstract

The structural units and their optical properties for different profiles of selected Paleocene calcareous nannofossil were recorded in the mobile mounts that led to the establishment of five new genera Davidbukrya, Mauriceblackia, Mulleria, Noelia and Senelia. The following eleven new species Davidbukrya claracirculus, Davidbukrya clemencesalleyae, Davidbukrya perchnielseniae, Mulleria karacuhae, Mulleria tuzuniorum, Noelia kolona, Noelia mahaniae, Noelia unverdii, Senelia? katapliktikos, Senelia perifanos and Senelia plevrotos are described. Four new combinations are introduced: Davidbukrya perpolitus, Davidbukrya protomultiradiatus, Mauriceblackia media and Mulleria bramlettei. The stratigraphic ranges of the new species and their speculative evolutionary trends are presented.

Keywords: Paleocene, taxonomy, stratigraphy, evolutionary trends, new taxa, mobile mount, optical properties.