pforams@mikrotax - Berggrenia

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Berggrenia

Classification: pf_cenozoic -> Genera incertae sedis -> Berggrenia
Sister taxa: Berggrenia, Dentigloborotalia

Daughter taxa (time control age-window is: 0-800Ma)
			Berggrenia pumilio monospecific
			Berggrenia sp. Specimens which cannot be assigned to established species

Taxonomy

Citation: Berggrenia Parker 1976

Taxonomic rank: genus

Type species: Berggrenia praepumilio

Taxonomic discussion: The phylogenetic position of this genus remains enigmatic. It features an adumbilically displaced ampullate final chamber, like the spinose Turborotalita, but its wall is non-spinose with the umbilical side ornamented by radial striae and pores concentrated along the sutures on the spiral side. For example, Saito et al. (1981) emphasized the ampullate final chamber to assign to Berggrenia the minute Turborotalita clarkei, a decision which we here reject. We consider it likely that Berggrenia represents a lineage of foraminifera that invaded the plankton from an independent benthic ancestor, and the genus must be retained until its phylogenetic position is resolved by genetic data. [Brummer & Kucera 2022]

Catalog entries: Berggrenia

Distinguishing features:
Parent taxon (Genera incertae sedis):
This taxon: Radial ridges on umbilical side:

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.

Description

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant. Data source: Total of ranges of the species in this database
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source: Total of ranges of species in this database

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. See also: customisable plot Parent: Genera incertae sedis

References:

Brummer, G-J. A. & Kucera, M. (2022). Taxonomic review of living planktonic foraminifera. Journal of Micropalaeontology. 41: 29-74. gs

Parker, F. L. (1976). Taxonomic notes on some planktonic Foraminifera. Progress in Micropaleontology. 258-262. gs

Saito, T., Thompson, P. R. & Breger, D. (1981). Systematic Index of Recent and Pleistocene Planktonic Foraminifera. University of Tokyo Press, Tokyo. 1-190. gs

Berggrenia compiled by the pforams@mikrotax project team viewed: 20-1-2025

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Short stable page link: https://mikrotax.org/pforams/index.php?id=104006 Go to Archive.is to create a permanent copy of this page - citation notes

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