Gallitellia

NB TAXA WHICH ORIGINATE IN THE OLIGOCENE ARE NOT INCLUDED YET
Classification: pf_neogene -> Guembelitriidae -> Gallitellia
Sister taxa: Gallitellia,
Daughter taxa (blue => in age window 0-300Ma)

Specimens which cannot be assigned to established species

Taxonomy

Citation: Gallitellia Loeblich & Tappan, 1986
Rank: genus
Type species: Guembelitria vivans Cushman, 1934
Taxonomic discussion: All Cretaceous and Paleogene triserial forms posses an asymmetrical aperture with a small toothplate. For this reason we include Jenkinsina in the synonymy of Guembelitria. Gallitellia,however, differs from Guembelitria in more than ornamentation alone. It lacks both the distinct apertural lip found in Guembelitria as well as a toothplate. These differencesappear to be more fundamental. We therefore retain the genus Gallitellia. [Kroon & Nederbragt 1990]

Catalog entries: Gallitellia;

Type images:

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.

Description


Diagnostic characters:

Gallitellia is characterized by its smooth, microperforate wall and its simple aperture that lacks a lip or toothplate. Multiserial chamber-proliferation may occur as a gerontic stage. 

Character matrix

test outline:Triangularchamber arrangement:Triserialedge view:-aperture:
umb chamber shape:coiling axis:N/Aperiphery:aperture border:
sp chbr shape:umbilicus:periph margin shape:accessory apertures:None
umbilical or test sutures:umb depth:wall texture:shell porosity:Microperforate: <1
spiral sutures:diameter mm:width mm:breadth mm:
final-whorl chambers:0.0-0.0

Biogeography and Palaeobiology

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: Kroon & Nederbragt 1990
First occurrence (base): within Quaternary Period (0.00-2.59Ma, base in Gelasian stage). Data source: Kroon & Nederbragt 1990

Plot of occurrence data:

Primary source for this page: Kroon & Nederbragt 1990

References:

Kroon, D. & Nederbragt, A.J., (1990). Ecology and paleoecology of triserial planktic foraminifera. Marine Micropaleontology, 16: 25-38.

Loeblich, A.R. & Tappan, H., (1986). Some new and revised genera and families of hyaline calcareous Foraminiferida (Protozoa). Transactions of the American Microscopical Society, 105: 239-265.


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Gallitellia compiled by the pforams@mikrotax project team viewed: 21-11-2017

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