Tanzanella


Classification: Mesozoic -> Holococcoliths -> Rarer genera -> Tanzanella
Sister taxa: Bifidalithus, Bilapillus, Multipartis, Munarinus, Octolithus, Okkolithus, Ottavianus, Pharus, Ramsaya, Russellia, Saepiovirgata, Acuturris, Anfractus, Duocameratus, Lacunolithus-Bown, Metadoga, Nicholasia, Paulpearsonia, Petrobrasiella, Pseudoconus, Semihololithus, Stereorhabdus, Tanzanella, Thecatus, unidentified holococcoliths,

Distinguishing features: Cavate holococcolith with internal walls and distal protrusions


Daughter taxa: (blue => in age window 0-800Ma)

Specimens not identified to species level

Taxonomy:

Citation: Tanzanella Lees, 2007
Rank: Genus
Type species: Tanzanella bownii Lees, 2007
Notes & discussion: Lees used the name Tanzanensis on plates in Perez-Rodriguez et al. 2012

Farinacci & Howe catalog pages: Tanzanella *

Distinguishing features: Cavate holococcolith with internal walls and distal protrusions


Morphology remarks: "Holococcoliths with a complex structure, as seen in side view. In XPL, rotated to 45 ̊, the rim and proximal plate are thin, birefringent and clearly visible. Encased within these is a blocky structure, from the distal surface of which emanate four ‘prongs’." [Lees 2007]

Geological Range:
Last occurrence (top): in upper part of Cenomanian Stage (83% up, 95Ma, in Cenomanian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Cenomanian Stage (66% up, 96.1Ma, in Cenomanian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Lees, J. A. (2007). New and rarely reported calcareous nannofossils from the Late Cretaceous of coastal Tanzania: outcrop samples and Tanzania Drilling Project Sites 5, 9 and 15. Journal of Nannoplankton Research. 29(1): 39-65. gs

Perez-Rodriguez, I., Lees, J. A., Larasoaña, J. C., Arz, J. A. & Arenillas, I. (2012). Planktonic foraminiferal and calcareous nannofossil biostratigraphy and magnetostratigraphy of the uppermost Campanian and Maastrichtian at Zumaia, northern Spain. Cretaceous Research. 37: 100-126. gs


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Tanzanella compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-8-2019

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=11191 Go to Archive.is to create a permanent copy of this page - citation notes



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