|Daughter taxa (time control age-window is: 0-800Ma)||Granddaughter taxa|
Wall spinose, usually with 3½-6 globular chambers in final whorl, trochospiral or planispiral
Planispiral, wall smooth
Hedbergellids - trochospiral, mostly low trochospiral. Apertures of earlier formed chambers remain visible around the umbilicus.
|Genera incertae sedis|
monolamellar, thick spines, thin shell
Microperforate with sutural apertures (and possibly a separate evolutionary origin)
|Biserial & triserial|
Biserial, enrolled biserial and triserial taxa. Wall microperforate.
Biserial (separate evolutionary origin)
Catalog entries: Globorotalia (Fohsella)
Parent taxon (images):
This taxon: This is a polyphyletic gruoping including all Cenozoic planktonic foraminifera
Phylogenetic relations: The large majority of included taxa are thought to have a common origin from a single surviving species after the K/Pg extinctions. Alternatively more polyphyetic origins from a range of survivors have been proposed. The biserial taxa are thought to have repeatedly evolved from benthic taxa.
Last occurrence (top): Extant. Data source: Total of range of species in this database
First occurrence (base): at top of No known fossil record modern (100% up, 0Ma, in "Holocene" stage). Data source: Total of range of species in this database
Plot of occurrence data:
Cenozoic Planktonic Foraminifera compiled by the pforams@mikrotax project team viewed: 26-5-2022
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