Futyania petalosa


Classification: Coccolithophores -> Isochrysidales -> Prinsiaceae -> Futyania -> Futyania petalosa
Sister taxa: F. petalosa, F. sp.,

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


Taxonomy:

Citation: Futyania petalosa (Ellis and Lohmann, 1973) Varol, 1989
Rank: Species
Basionym: Toweius petalosus Ellis and Lohmann, 1973
Variants: Futyania attewellii Varol 1989 - circular and with smaller central area
Notes & discussion: Often seen in side view in light microscope and as complete coccospheres.

Farinacci & Howe catalog pages: Futyania attewellii * Toweius petalosus *

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


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

Search data:
TagsLITHS: placolith, circular, CA: Placoliths: closed, PROCESS: broad, length-slow, low, spine,
CSPH: spherical, BC+process, BC-dimorphic, monomorphic, polymorphic, V-UNITS: distal shield, R-UNITS: c-str, spine, DETAILS: ca_conjunct,
MetricsLith size: 1->2┬Ám; Liths per sphere: 40->80
Sources: OD and illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

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

Plot of occurrence data:

References:

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.

Varol, O., (1989). Palaeocene calcareous nannofossil biostratigraphy. In: Crux, J.A. and van Heck, S.E. (Editors), Nannofossils and their applications. Ellis Horwood, Chichester, pp. 265-310.


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Futyania petalosa compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 15-12-2017

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Jeremy Young

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