Nannotax3 - ntax_cenozoic - Futyania Nannotax3 - ntax_cenozoic - Futyania

Futyania


Classification: ntax_cenozoic -> Isochrysidales -> Prinsiaceae -> Futyania
Sister taxa: Futyania, Praeprinsius, Prinsius, Toweius ⟩⟨ Neobiscutum, Hornibrookina

Daughter taxa (time control age-window is: 0-800Ma)
Futyania petalosa
Very small circular to elliptical placoliths with narrow central area and tube-elements extended to form a flower-like distal structure.
Futyania sp.
Specimens which cannot be assigned to any established species

Taxonomy:

Citation: Futyania Varol, 1989
taxonomic rank: Genus
Type species: Futyania petalosa (Ellis and Lohmann, 1973) Varol, 1989 [Toweius].

Distinguishing features:
Parent taxon (Prinsiaceae): Placoliths with R-units forming the lower layer of proximal shield, inner tube and middle tube; V-units forming an upper layer to the proximal shield, outermost tube and the distal shield. In LM they display a dark outer cycle and brighter inner cycle. Central-area structures are conjunct, formed from the R-units.
This taxon: Very small (1-2.5 µm) circular to elliptical; central area narrow, tube-elements extended distally to form an elevated flower-like structure.

Farinacci & Howe catalog pages: Futyania *

Most likely ancestor: Praeprinsius - at confidence level 3 (out of 5). Data source: Bown et al. 2023, fig.8.

Search data:
LITHS: placolith, circular, CA: ca_conjunct, process, closed,
CSPH: equant, CROSS-POLARS: V-prominent, R-prominent,
Lith size: 1->2µm; Liths per sphere: 40->60
Data source notes: my obs
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): at top of NP2 zone (100% up, 64.8Ma, in Danian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within NP1 zone (65.47-66.04Ma, base in Danian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

References:

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


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Futyania compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 21-4-2024

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=598 Go to Archive.is to create a permanent copy of this page - citation notes
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