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New and intriguing calcareous nannofossils from the Turonian (Upper Cretaceous) of Tanzania

Lees, JA; Bown, PR; (2016) New and intriguing calcareous nannofossils from the Turonian (Upper Cretaceous) of Tanzania. Journal of Nannoplankton Research , 36 (1) pp. 83-95. Green open access

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Abstract

The preservation of exceptionally well-preserved, primary associations of calcareous nannofossils on lamina surfaces of shallowly-buried, uncemented, clay-rich Turonian sediments of coastal Tanzania has enabled us to document several intriguing new morphologies using the scanning electron microscope (SEM). Based on our new observations, we describe a new genus, Jimenezberrocosoia, and six new species, J. birchiae, Ellipsolithus linnertii, Petrarhabdus? kirenii, Braarudosphaera wendleriae, Nannoconus funiculus and Kokia kayae. We have also made two new combinations, Jimenezberrocosoia bosunensis (Jeremiah, 2001) and Nannoconus nicholasii (Lees, 2007), and emended the Order Braarudosphaerales to include the Nannoconaceae. Most of the taxa are illustrated with both SEM and light microscope images. The presence of Ellipsolithus in these Cretaceous sediments greatly extends the range of this formerly Cenozoic-restricted taxon.

Type: Article
Title: New and intriguing calcareous nannofossils from the Turonian (Upper Cretaceous) of Tanzania
Open access status: An open access version is available from UCL Discovery
Publisher version: http://ina.tmsoc.org/JNR/JNRcontents.htm
Language: English
Additional information: Copyright © 2017 The Author(s). All rights reserved.
Keywords: Upper Cretaceous, Turonian, Tanzania Drilling Project, calcareous nannofossil taxonomy, Nannoconaceae, Braarudosphaeraceae, Braarudosphaerales
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1518018
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