Distinguishing features: Parent taxon (Chiloguembelina): Test subtriangular in outline, biserial throughout or rarely with multiserial final chambers; aperture a simple arched opening at base of the final chamber, with a narrow rim on one margin and a broad collar or flange directed toward one of the flat sides of the test, lacking an infolded margin or internal plate. Rarely with multiple apertures. 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
Geological Range: Last occurrence (top): within (-Ma, top in "Holocene" stage). Data source: First occurrence (base): within (-Ma, base in "Holocene" 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
Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
Taxon plotted: Chiloguembelina sp., synonyms included - Chiloguembelina cubensis (q); Chiloguembelina gradata; Chiloguembelina cf. C. martini; Chiloguembelina sp.; Chiloguembelina spp.; Chiloguembelina spp. (>150 microns); Chiloguembelina subtriangularis (q); Chiloguembelina waiparoensis (q); Chiloguembelinid (unspecified taxon or taxa); Chiloguembelinid gen. et sp. indet (<150 microns); Chiloguembelinid gen. et sp. indet (>150 microns); Chiloguembelinid gen. et sp. indet (mainly Ch. midwayensis) (>150 microns); Chiloguembelinid gen. et sp. indet (mainly Ch. midwayensis) large; Guembelina globosa striatula; Guembelina sp.;