Classification: pf_cenozoic -> hidden -> deleted
Sister taxa: deleted, sandbox, unsorted, y. younger-species,
|Daughter taxa: (blue => in age window 0-300Ma) |
| Test a low trochospire, equatorial periphery trilobate to quadrilobate. Axial periphery rounded. Wall calcareous, |
perforate, usually coarsely pitted. Chambers 12-14 in number arranged in 2-3 whorls, spherical to ovate,appressed,
with 3-4 chambers in the final whorl. Distinct radial sutures on both umbilical and spiral sides, depressed and
tending to be U-shaped in the thicker walled tests. Umbilicus small. Aperture a medium-sized arch, interiomarginal,
umbilical, with a clear, small fimbriate liplike margin around its border.
NB The short diagnoses are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus. They have initially been copied from the diagnostic characters/distinguishing features sections of the Eocene and Paleocene Atlases, they will be edited as the site is developed.
Biogeography and Palaeobiology
Last occurrence (top): within (-Ma, top in "Holocene" stage). Data source:
First occurrence (base): within (-Ma, base in stage). Data source:
Plot of occurrence data:
- Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
- Triangles indicate an event for which a precise placement has been suggested
- Neptune data: this is a higher taxon page so Neptune data is not plotted. For the customisable plot option go to a genus page Parent: hidden
deleted compiled by the pforams@mikrotax project team viewed: 22-7-2018
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