Nannotax3 - ntax_cenozoic - Sphenolithus capricornutus

Sphenolithus capricornutus


Classification: ntax_cenozoic -> Discoasterales -> Sphenolithaceae -> Sphenolithus -> S. capricornutus group -> Sphenolithus capricornutus
Sister taxa: S. capricornutus, S. cometa, S. multispinatus

Taxonomy:

Citation: Sphenolithus capricornutus Bukry & Percival 1971
Rank: Species

Taxonomic discussion:
One of the Oligo-Miocene boundary group of delicate sphenoliths (see also S. calyculus, S. delphix).

Distinguishing features:
Parent taxon (S. capricornutus group): Apical spine formed of radiating elements
This taxon: Small with two, diverging, apical spines, and usually a flaring base.

Farinacci & Howe catalog pages: S. capricornutus *

Most likely ancestor: Sphenolithus procerus - at confidence level 3 (out of 5). Data source: Howe 2021, fig. 10.
Likely descendants: Sphenolithus multispinatus; plot with descendants

Search data:
TagsLITHS: nannolith-radiate, circular, cylindrical, CA: process, CROSS-POLARS: R-prominent,
MetricsLith size: 6->10µm;
Data source notes: lith height from OD and 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 NN1 zone (22.82-23.13Ma, top in Aquitanian stage). Data source: Young 1998
First occurrence (base): within NP26 zone (23.13-24.40Ma, base in Chattian stage). Data source: Bergen et al. 2017

Plot of occurrence data:

References:

Bergen, J. A., de Kaenel, E., Blair, S. A., Boesiger, T. M. & Browning, E. (2017). Oligocene-Pliocene taxonomy and stratigraphy of the genus Sphenolithus in the circum North Atlantic Basin: Gulf of Mexico and ODP Leg 154. Journal of Nannoplankton Research. 37(2-3): 77-112. gs V O

Bukry, D. & Percival, S. F. (1971). New Tertiary calcareous nannofossils. Tulane Studies in Geology and Paleontology. 8: 123-146. 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

Howe, R. (2021). Ultrastructure and taxonomy of the family Sphenolithaceae. Journal of Nannoplankton Research. 39(1): 29-75. gs

Maiorano, P. & Monechi, S. (1998). Revised correlations of early and middle Miocene calcareous nannofossil events and magnetostratigraphy from DSDP Site 563 (North Atlantic Ocean). Marine Micropaleontology. 35(235-255): -. gs

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


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

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1286 Go to Archive.is to create a permanent copy of this page - citation notes



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