Daughter taxa (time control age-window is: 0-800Ma) | Granddaughter taxa | ||||
Diantholitha mariposa | |||||
Diantholitha sp. |
Taxonomy:
Distinguishing features:
Parent taxon (Fasciculithaceae): Conical or cylindrical discoasteralids consisting of 10-30 wedge-shaped, radially-arranged elements, in one to three superposed cycles.
This taxon: Squat fasciculiths divided into sub-equal upper and lower cycles with different optical orientations. Conical openings on both sides, no fenestrae
Farinacci & Howe catalog pages: Diantholitha + *
Morphology:
LITHS: nannolith-radiate, circular, cylindrical, hollow, CROSS-POLARS: V-prominent, R-prominent, |
Lith size: 5->9µm; |
Geological Range:
Notes: Confined to a short interval within NP4 - this is best documented in Monechi et al. 2013, who indicate the range is approximately equivalent to magnetochron C27n
Last occurrence (top): at top of NP4 zone (100% up, 61.5Ma, in Selandian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within NP4 zone (61.51-63.25Ma, base in Danian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Aubry, M. P., Bord, D. & Rodriguez, O. (2011). New taxa of the Order Discoasterales Hay 1977. Micropaleontology. 57(3): 269-287. gs Aubry, M. -P., Rodriguez, O., Bord, D., Godfrey, L., Schmitz, B. & Knox, R. W. O. B. (2012). The first radation of the Fasciculiths: Morphologic adaptations of the coccolithophores to oligotrophy. Australian Journal of Earth Sciences. 105(1): 29-38. gs Miniati, F., Cappelli, C. & Monechi, S. (2021). Revised taxonomy and early evolution of fasciculiths at the Danian–Selandian transition. Journal of Micropalaeontology. 40: 101-144. gs O Monechi, S., Reale, V., Bernaola, G. & Balestra, B. (2013). The Danian/Selandian boundary at Site 1262 (South Atlantic) and in the Tethyan region: Biomagnetostratigraphy, evolutionary trends in fasciculiths and environmental effects of the Latest Danian Event. Marine Micropaleontology. 98(1): 28-40. gsReferences:
Diantholitha compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 12-9-2024
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=433 Go to Archive.is to create a permanent copy of this page - citation notes |
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