Discoaster mahmoudii


Classification: Coccolithophores -> Discoasterales -> Discoasteraceae -> Discoaster -> D. lodoensis group -> Discoaster mahmoudii
Sister taxa: D. pacificus, D. falcatus, D. saipanensis, D. lodoensis, D. sublodoensis, D. mahmoudii, D. paelikei

Taxonomy:

Citation: Discoaster mahmoudii Perch-Nielsen, 1981
Rank: Species
Taxonomic discussion: Arms frequently broken off, leaving a Catinaster-like central area.

Distinguishing features: Distinctive stellate discoaster with 5 or 6 tapering free rays and a central area crossed by high inter-ray ridges that form a stellate boss.

Farinacci & Howe catalog pages: D. mahmoudii *

Search data:
TagsLITHS: nannolith-radiate, star-shaped, CA: process, CROSS-POLARS: 1ou, V-prominent,
MetricsLith size: 15->25µm; Segments: 5->6;
Data source notes: size from illustrated specs
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP10 zone (54.17-55.86Ma, top in Ypresian stage). Data source: PRB entry to Nannotax
First occurrence (base): within NP9 zone (55.86-57.21Ma, base in Thanetian stage). Data source: PRB entry to Nannotax

Plot of occurrence data:

References:

Bown, P. R. (2005d). Palaeogene calcareous nannofossils from the Kilwa and Lindi areas of coastal Tanzania (Tanzania Drilling Project 2003-4). Journal of Nannoplankton Research. 27(1): 21-95. gs V O

Bown, P. R. (2010). Calcareous nannofossils from the Paleocene/Eocene Thermal Maximum interval of southern Tanzania (TDP Site 14). Journal of Nannoplankton Research. 31(1): 11-38. gs V O

Perch-Nielsen, K. (1981b). New Maastrichtian and Paleocene calcareous nannofossils from Africa, Denmark, and USA and the Atlantic, and some Paleocene lineages. Eclogae Geologicae Helvetiae. 74(3): 831-863. gs V O


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Discoaster mahmoudii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-10-2020

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=478 Go to Archive.is to create a permanent copy of this page - citation notes



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