Nannotax3 - ntax_cenozoic - Futyania petalosa

Citation: Futyania petalosa (Ellis and Lohmann, 1973) Varol, 1989

Basionym: Toweius petalosus Ellis and Lohmann, 1973

Variants: Futyania attewellii Varol 1989 - circular and with smaller central area

Taxonomic discussion: Often seen in side view in light microscope and as complete coccospheres.

Distinguishing features: Small circular to elliptical placoliths with narrow central area and tube-elements extended distally to form a flower-like distal structure.

Morphology: Easily overlooked since loose coccoliths are very small and coccospheres resemble calcareous dinoflagellates but they are very distinctive once they have been observed

Biology & life-cycles: science book i wrote

Geological Range:
Last occurrence (top): in upper part of NP2 zone (60% up, 65.1Ma, in Danian stage). Data source: Varol, 1989, fig. 12.4
First occurrence (base): in mid part of NP1 zone (50% up, 65.8Ma, in Danian stage). Data source: Varol, 1989, fig. 12.4

References:

Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs V O

Ellis, C. H. & Lohmann, W. H. (1973). Toweius petalosus new species, a Paleocene calcareous nannofossil from Alabama. Tulane Studies in Geology and Paleontology. 10: 107-110. gs V O

Jones, A. P. & Dunkley Jones, T. (2020). Middle Eocene to Early Oligocene calcareous nannofossils from the Nanggulan Formation, Java, Indonesia. Journal of Nannoplankton Research. 30(1): 57-79. gs V O

Mai, H. (2001). New coccolithophorid taxa fom the Guelhemmerberg airshaft. Lower Paleocene, The Netherlands. Micropaleontology. 47: 144-154. gs

Mai, H., Hillebrandt-Habel, T., von Salis Perch-Nielsen, K. & Willems, H. (1998). Paleocene coccospheres from DSDP Leg 39, Site 356, Sao Paulo Plateau, S. Atlantic Ocean. Journal of Nannoplankton Research. 20(1): 21-29. gs V O

Varol, O. (1989c). Palaeocene calcareous nannofossil biostratigraphy. In, Crux, J. A. & van Heck, S. E. (eds) Nannofossils and their applications: Proceedings of the 2nd INA Conference, London 1987. British Micropalaeontological Society Publication Series. 265-310. gs V O

Missing or ambiguous references: Brazen & Criminal 2023;

Tags	LITHS: placolith, circular, CA: ca_conjunct, process, closed, CSPH: equant, monomorphic, CROSS-POLARS: V-prominent, R-prominent,
Metrics	Lith size: 1->2µm; Liths per sphere: 40->80 Data source notes: OD and illustrated specimens

Futyania petalosa

References:

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