Nannotax3 - ntax_cenozoic - Algirosphaera fabaceus Nannotax3 - ntax_cenozoic - Algirosphaera fabaceus

Algirosphaera fabaceus


Classification: ntax_cenozoic -> Syracosphaerales -> Rhabdosphaeraceae -> Algirosphaera -> Algirosphaera fabaceus
Sister taxa: A. cucullata, A. fabaceus, A. meteora, A. robusta, A. sp.

Taxonomy:

Citation: Algirosphaera fabaceus (Bown & Dunkley Jones et al., 2006) Bown et al., 2009
Taxonomic rank: species
Basionym: Holodiscolithus fabaceus Bown & Dunkley Jones et al., 2006

Distinguishing features:
Parent taxon (Algirosphaera): Body coccoliths with well-developed radial lath cycle; domal or double-lipped protrusion; coccosphere dimorphic, CFCs larger and taller
This taxon: Coccoliths elongate, protrusion with internal rods in two superposed sets (vertical and oblique) and tile cover

Farinacci & Howe catalog pages: H. fabaceus *


Morphology:

The hood is parallel-sided for around half its height, then broadens distally to dimensions similar to that of the coccolith base and is topped by a gently curving upper surface. The hood is formed from a three-dimensional complex of laths and in the upper part is partially covered in thin, square and rectangular plates.

Search data:
LITHS: planolith, elliptical, CA: ca_disjunct, grill, process,
Lith size: 3->5µm;
Data source notes: lith size from OD (BC width) & slightly extended (BC width)
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NP21 zone (32.92-34.44Ma, top in Rupelian stage). Data source: Dunkley Jones et al., 2009
First occurrence (base): within NP19-20 zone (34.44-36.97Ma, base in Priabonian stage). Data source: Dunkley Jones et al., 2009

Plot of occurrence data:

References:

Bown, P. R. & Dunkley Jones, T. (2006). New Paleogene calcareous nannofossil taxa from coastal Tanzania: Tanzania Drilling Project Sites 11 to 14. Journal of Nannoplankton Research. 28(1): 17-34. gs

Bown, P. R., Young, J. R., Dunkley Jones, T. & Randell, R. (2009). A Paleogene record of extant lower photic zone calcareous nannoplankton. Palaeontology. 52(2): 457-469. gs

Dunkley Jones, T., Bown, P. R. & Pearson, P. (2009). Exceptionally well preserved upper Eocene to lower Oligocene calcareous nannofossils (Prymnesiophycidae) from the Pande Formation (Kilwa Group), Tanzania. Journal of Systematic Palaeontology. 7(4): 359-411. gs


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Algirosphaera fabaceus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-2-2025

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=20 Go to Archive.is to create a permanent copy of this page - citation notes
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