Nannotax3 - ntax_cenozoic - Orthorhabdus serratus

Orthorhabdus serratus

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


Citation: Orthorhabdus serratus Bramlette and Wilcoxon, 1967
Rank: Species
Synonyms: Triquetrorhabdulus martinii Gartner, 1967.

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: Elongate Orthorhabdus species - triangular in plan view, hockey-stick shaped in side view.

Farinacci & Howe catalog pages: O. serratus * , T. martinii *

Morphology: The median blade is wider than the two lateral blades and the c-axis lies in the plane of this blade, so this nannolith can be seen in two different orientations

Search data:
TagsLITHS: nannolith-other, rod-shaped, CROSS-POLARS: 1ou, T-prominent,
MetricsLith size: 8->20µm; Segments: 3->3;
Data source notes: lith length from OD & 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 NN6 zone (11.90-13.53Ma, top in Serravallian stage). Data source: Young 1998
First occurrence (base): within NN2 zone (19.00-22.82Ma, base in Aquitanian stage). Data source: Young 1998

Plot of occurrence data:


Bown, P. R. & Dunkley Jones, T. (2012). Calcareous nannofossils from the Paleogene equatorial Pacific (IODP Expedition 320 Sites U1331-1334). Journal of Nannoplankton Research. 32(2): 3-51. gs V O

Bramlette, M. N. & Wilcoxon, J. A. (1967b). Middle Tertiary calcareous nannoplankton of the Cipero section, Trinidad, W.I. Tulane Studies in Geology and Paleontology. 5: 93-131. gs V O

de Kaenel, E. & Villa, G. (1996). Oligocene-Miocene calcareous nannofossil biostratigraphy and paleoeecology from the Iberian Abyssal Plain. Proceedings of the Ocean Drilling Program, Scientific Results. 149: 79-145. gs V O

Gartner, S. (1967a). Calcareous nannofossils from Neogene of Trinidad, Jamaica, and Gulf of Mexico. University of Kansas Paleontological Contributions, Papers. 29: 1-7. gs V O

Müller, C. (1974b). Calcareous nannoplankton, Leg 25 (Western Indian Ocean). Initial Reports of the Deep Sea Drilling Project. 25: 579-633. gs V O

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

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


Orthorhabdus serratus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-9-2021

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