Nannotax3 - ntax_cenozoic - Sphenolithus neoabies

Sphenolithus neoabies

Classification: ntax_cenozoic -> Discoasterales -> Sphenolithaceae -> Sphenolithus -> S. moriformis group -> Sphenolithus neoabies
Sister taxa: S. abies, S. apoxis, S. bipedis, S. neoabies, S. moriformis, S. puniceus, S. grandis ⟩⟨ S. acervus, S. primus

Bergen et al 2017 fig3 01.JPG

Taxonomy:

Citation: Sphenolithus neoabies Bukry & Bramlette 1969

Rank: Species

Taxonomic discussion: There is no good evidence that separating small sphenoltith specimens from large ones is useful for either biostratigraphy or palaeocology and we do not reccommend use of this taxon. It is however fairly widely used, including in database records, so we include it here in the interests of objectivity.
Bergen et al. (2017) use the species but note that it has the same LAD as S. abies. They record an FAD in NN4 at Ceara Rise.

Distinguishing features: Like S. abies/moriformis but smaller, <4µm & base broad

Farinacci & Howe catalog pages: S. neoabies *

Size: Bukry & Bramlette proposed a size range of 2-4µm for S. neoabies, Backman proposed a size range of 2-3µm for S. compactus.

Search data:

Tags	LITHS: nannolith-radiate, circular, cylindrical, CROSS-POLARS: R-prominent,
Metrics	Lith size: 2->4µm; Data source notes: lith height from ODs

The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: There have been suggestions that S. neoabies has a slightly higher top in the Pliocene than S. abies.
Last occurrence (top): within NN15 zone (3.70-3.92Ma, top in Zanclean stage). Data source: commonly recorded up to last occurrence of the genus.
First occurrence (base): within NN4 zone (14.91-17.95Ma, base in Burdigalian stage). Data source: Bergen et al. (2017)

Plot of occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
Taxon plotted: Sphenolithus neoabies, synonyms included - Sphenolithus compactus; Sphenolithus neoabies;
See also space-time plot :: Samples map :: Parent: S. moriformis group

References:

Backman, J. (1980). Miocene-Pliocene nannofossils and sedimentation rates in the Hatton-Rockall Basin, NE Atlantic Ocean. Stockholm Contributions in Geology. 36: 1-91. gs

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. & Bramlette, M. N. (1969b). Some new and stratigraphically useful calcareous nannofossils of the Cenozoic. Tulane Studies in Geology. 7: 131-142. gs V O

Sphenolithus neoabies compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 24-7-2021

Taxon Search:

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1306 Go to Archive.is to create a permanent copy of this page - citation notes

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