Sphenolithus apoxis
Classification: ntax_cenozoic -> Discoasterales -> Sphenolithaceae -> Sphenolithus -> S. moriformis group -> Sphenolithus apoxis
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 08.JPG
Bergen et al 2017 pl02 11-12.JPG
Bergen et al 2017 pl02 13-14.JPG
Bergen et al 2017 pl02 15-16.JPG
Bergen et al 2017 pl02 17-18.JPG
Bergen et al 2017 pl02 19-20.JPG
Taxonomy:
Citation: Sphenolithus apoxis Bergen & de Kaenel, in Bergen et al. 2017Rank: speciesTaxonomic discussion: Bergen et al. (2017) propose this taxon for S. abies-like specimens occurring in the Oligocene and early Miocene.
Distinguishing features: Conical sphenolith with a compound apical spine. (like S. abies but older)
Farinacci & Howe catalog pages: S. apoxis *
Search data:
Tags | LITHS: nannolith-radiate, circular, cylindrical, CROSS-POLARS: R-prominent, |
Metrics | Lith size: 0->0µm; |
The morphological data given here can be used on the advanced search page. See also these notes
Geological Range:
Last occurrence (top): within NN3 zone (17.95-19.00Ma, top in Burdigalian stage). Data source: Bergen et al 2017
First occurrence (base): within NP11 zone (53.70-54.17Ma, base in Ypresian 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
- (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: S. moriformis group
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