Nannotax3 - ntax_cenozoic - Rhomboaster calcitrapa Nannotax3 - ntax_cenozoic - Rhomboaster calcitrapa

Rhomboaster calcitrapa


Classification: ntax_cenozoic -> Nannolith families inc sed -> Rhomboasteraceae -> Rhomboaster -> Rhomboaster calcitrapa
Sister taxa: R. bramlettei, R. calcitrapa, R. cuspis, R. sp.

Taxonomy:

Citation: Rhomboaster calcitrapa Gartner, 1971
taxonomic rank: Species
Variants:
Taxonomic discussion: Regarded as a variant of R. bramlettei by Bybell & Self-Trail (1995, 1998)

Distinguishing features:
Parent taxon (Rhomboaster): Solid nannoliths that include rhombic, rhombic with spinose extensions and forms composed of two superimposed tri-radiate cycles.
This taxon: Rhombic Rhomboaster nannoliths with long, thin extensions from the points of the rhomb.

Farinacci & Howe catalog pages: R. calcitrapa * , M. spineus *

Search data:
LITHS: nannolith-radiate, star-shaped, CROSS-POLARS: V-prominent, 1ou,
Lith size: 10->20µm; Segments: 6->6;
Data source notes: lith size from illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): near base of NP10 zone (5% up, 55.8Ma, in Ypresian stage). Data source: same range given as for R. cuspis
First occurrence (base): at top of NP9 zone (95% up, 55.9Ma, in Ypresian stage). Data source: same range given as for R. cuspis

Plot of occurrence data:

References:

Bown, P. R. (2010). Calcareous nannofossils from the Paleocene/Eocene Thermal Maximum interval of southern Tanzania (TDP Site 14). Journal of Nannoplankton Research. 31(1): 11-38. gs O

Bybell, L. M. & Self-Trail, J. (1995). Evolutionary, biostratigraphic and taxonomic study of calcareous nanofossils from a continuous Palaeocene-Eocene boundary section in New Jersey. U.S. Geological Survey, Professional Paper. 1554: 1-36. gs O

Bybell, L. & Self-Trail, J. (1997). Late Paleocene and Early Eocene calcareous nannofossils from three boreholes in an onshore-offshore transect from New Jersey to the Atlantic continental rise. Proceedings of the Ocean Drilling Program, Scientific Results. 150: 91-110. gs O

Gartner, S. (1971). Calcareous nannofossils from the JOIDES Blake Plateau cores and revision of the Paleogene nannofossil zonation. Tulane Studies in Geology and Paleontology. 8: 101-121. gs O

Perch-Nielsen, K. (1985). Cenozoic calcareous nannofossils. In, Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge (1): 427-555. gs

Salomon, R. (1999). The Calcite Palace. Website - https://ina.tmsoc.org/galleries/CalcitePalace/index.htm. -. gs


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Rhomboaster calcitrapa compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 11-12-2024

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1204 Go to Archive.is to create a permanent copy of this page - citation notes
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