Gallitellia


Classification: pf_cenozoic -> Benthic origins -> Gallitellia
Sister taxa: Gallitellia, Streptochilus,
Daughter taxa: (blue => in age window 0-300Ma)
monospecific
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:

Distinguishing features:

Initially biserial may become multiserial, smooth, microperforate wall; aperture simple (no lip or toothplate). 

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


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:-
spiral sutures:-final-whorl chambers:0.0-0.0

Biogeography and Palaeobiology

Most likely ancestor: Benthic foraminifera - at confidence level 0 (out of 5). Data source: .

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): at base of Piacenzian Stage (0% up, 3.6Ma, in Piacenzian stage). Data source: Total of range of species in this database

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: 18-10-2018

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Short stable page link: http://mikrotax.org/pforams/index.php?id=104030Go to Archive.is to create a permanent copy of this page - citation notes



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