Sphenolithus disbelemnos


Classification: ntax_cenozoic -> Discoasterales -> Sphenolithaceae -> Sphenolithus -> S. dissimilis group -> Sphenolithus disbelemnos
Sister taxa: S. disbelemnos, S. dissimilis, S. procerus, S. tintinnabulum, S. paratintinnabulum, S. truaxii

Taxonomy:

Citation: Sphenolithus disbelemnos Fornaciari and Rio, 1996
Rank: Species
Synonyms:
Taxonomic discussion: This may be a precursor of S. belemnos. but has a shorter spine formed of multiple elements

Distinguishing features: cylindroconical with short spine and high base

Farinacci & Howe catalog pages: S. disbelemnos * , S. aubryae *

Search data:
TagsLITHS: nannolith-radiate, circular, cylindrical, CROSS-POLARS: V-prominent, R-prominent,
MetricsLith size: 3->5µm;
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 NN3 zone (17.95-19.00Ma, top in Burdigalian stage). Data source: Maiorano & Monechi 1997
First occurrence (base): in mid part of chron C6Cn.1n sub-Magnetochron (50% up, 22.7Ma, in Aquitanian stage). Data source: Raffi et al. 2006, fig. 5

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

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

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

Fornaciari, E. & Rio, D. (1996). Latest Oligocene to early Middle Miocene quantitative calcareous nannofossil biostratigraphy in the Mediterranean region. Micropaleontology. 42(1): 1-37. gs

Maiorano, P. & Monechi, S. (1997). New Early Miocene species of Sphenolithus Deflandre, 1952 from the North Atlantic Ocean. Journal of Nannoplankton Research. 19(2): 103-107. gs V O

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

Rio, D., Raffi, I. & Villa, G. (1990b). Pliocene-Pleistocene calcareous nannofossil distribution patterns in the western Mediterranean. Proceedings of the Ocean Drilling Program, Scientific Results. 107: 513-533. 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 disbelemnos compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 13-5-2021

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