Nannotax3 - ntax_mesozoic - Tanzanella Nannotax3 - ntax_mesozoic - Tanzanella

Tanzanella


Classification: ntax_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:
Parent taxon (Rarer genera): Less common genera
This taxon: Cavate holococcolith with internal walls and distal protrusions


Daughter taxa (time control age-window is: 0-800Ma)
Tanzanella bownii

Tanzanella sp.
Specimens not identified to species level

Taxonomy:

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

Farinacci & Howe catalog pages: Tanzanella *

Distinguishing features:
Parent taxon (Rarer genera): Less common genera
This taxon: Cavate holococcolith with internal walls and distal protrusions


Morphology:

"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]

Search data:
LITHS: holococcolith, elliptical, hollow, CA: ca_disjunct, plate, process, CROSS-POLARS: rim-bicyclic,
Lith size: 5->11µm;
Data source notes: size range of included species
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): at top of UC3b subzone (100% up, 95Ma, in Cenomanian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within UC3a subzone (95.93-96.16Ma, base in Cenomanian stage). Data source: Total of ranges 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 O

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: 18-6-2024

Taxon Search:
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Short stable page link: https://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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