pforams@mikrotax - Berggrenia

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
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


Emended description:


Morphology:

Wall type:

Size:
0

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
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:

References:

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

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


logo

Berggrenia compiled by the pforams@mikrotax project team viewed: 25-5-2022

Taxon Search:
Advanced Search

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



Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics