pforams@mikrotax - Rectoguembelina sp. pforams@mikrotax - Rectoguembelina sp.

Rectoguembelina sp.

Classification: pf_cenozoic -> Guembelitrioidea -> Heterohelicidae -> Rectoguembelina -> Rectoguembelina sp.
Sister taxa: R. cretacea, R. sp.


Rank: generic level id

Catalog entries:

Distinguishing features:
Parent taxon (Rectoguembelina): Transition from biserial to uniserial portion of test very abrupt, occurring after first four or more pairs of biserial chambers, without an intervening interval of gradually increasing chamber overlap. Apertures on biserial portion interiomarginal with a small, narrow arch; apertures on uniserial chambers terminal, circular, and aligned in rectilinear fashion, without lip or toothplate. Wall calcareous, microperforate; surface smooth to finely pustulose.
This taxon: Specimens which cannot be assigned to established species

NB These concise distinguishing features statements are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus.
They are being edited as the site is developed and comments on them are especially welcome.


Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): within (-Ma, top in "Holocene" stage).
First occurrence (base): within (-Ma, base in "Holocene" stage).

Plot of occurrence data:



Rectoguembelina sp. compiled by the pforams@mikrotax project team viewed: 1-6-2023

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