arrayname: original 
Nannotax3 - ntax_cenozoic - Orthorhabdus finifer Nannotax3 - ntax_cenozoic - Orthorhabdus finifer

Orthorhabdus finifer


Classification: ntax_cenozoic -> Nannolith families inc sed -> Ceratolithaceae -> Orthorhabdus -> Orthorhabdus finifer
Sister taxa: O. serratus, O. rugosus, O. striatus, O. rioi, O. finifer, O. extensus, O. sp.

Taxonomy:

Citation: Orthorhabdus finifer ( Theodoridis, 1984) Young & Bown 2014
Taxonomic rank: species
Basionym: Triquetrorhabdulus finifer Theodoridis, 1984
Taxonomic discussion: Arguably a transitional form to Amaurolithus

Distinguishing features:
Parent taxon (Orthorhabdus): Elongate nannoliths formed of three blades, with c-axis perpendicular to length. Usually curved and asymmetric. Shows low to moderate birefringence.
This taxon: Horseshoe-shaped species of Orthorhabdus with short median blade and elongate curved lateral blades.

Farinacci & Howe catalog pages: T. finifer *

Search data:
LITHS: nannolith-other, horseshoe-shaped, asymmetric, CROSS-POLARS: V-prominent, 1ou,
Lith size: 10->16µm; Segments: 3->3;
Data source notes: lith length from illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NN12 zone (5.12-5.59Ma, top in Zanclean stage). Data source: Young 1998
First occurrence (base): within NN11d subzone (5.59-5.94Ma, base in Messinian stage). Data source: Young 1998

Plot of occurrence data:

References:

Theodoridis, S. (1984). Calcareous nannofossil biostratigraphy of the Miocene and revision of the helicoliths and discoasters. Utrecht Micropaleontological Bulletin. 32: 1-271. gs O

Young, J. R. & Bown, P. R. (2014). Some emendments to calcareous nannoplankton taxonomy. Journal of Nannoplankton Research. 33(1): 39-46. gs

Young, J. R. (1998). Neogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 225-265. gs


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Orthorhabdus finifer compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-4-2025

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=970 Go to Archive.is to create a permanent copy of this page - citation notes
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