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Biticinella breggiensis


Classification: pf_mesozoic -> Rotaliporidae -> Biticinella -> Biticinella breggiensis
Sister taxa: B. breggiensis, B. subbreggiensis,

Taxonomy

Citation: Biticinella breggiensis (Gandolfi, 1942)
Rank: Species
Basionym: Anomalina breggiensis
Taxonomic discussion: Accessory apertures on umbilical and spiral sides. Accessory apertures are rarely seen on the spiral side unlike the umbilical side where they are always persent.Macroperforate wall. [copied from Chronos database]

Type images:

Original description: Anomalina breggiensis Gandolfi 1942: Italian translation:

Entries in the Catalog of original descriptions: Anomalina breggiensis;

Geological Range:
Last occurrence (top): within P. appenninica zone (100.50-101.92Ma, top in Albian stage). Data source: [copied from Chronos database]
First occurrence (base): within T. praeticinensis zone (106.98-107.39Ma, base in Albian stage). Data source: [copied from Chronos database]

Plot of occurrence data:

NB Plotting of Neptune data has been disabled on the Mesozoic pages because the dataset is both small and badly affected by a few sites with erroneous age models (our obs Huber, Petrizzo, Young, Nov 2016). The data can still be viewed via the range plottertool - tools menu.

Character matrix

test outline:Circularcoiling axis:Very lowchamber arrangement:Pseudoplanispiralumbilicus:Narrow
edge view:Hourglassumbilical or test sutures:Moderately depressedspiral sutures:Moderately depressedshell porosity:Finely Perforate: 1-2.5
wall texture:Moderately muricateaperture:Equatorialaperture border:Thick porticusaccessory apertures:Umbilical
periphery:N/Aumb chamber shape:Inflatedsp chbr shape:Inflatedperiph margin shape:Broadly rounded
umb depth:Deepdiameter mm:0.56width mm:breadth mm:0.27
final-whorl chambers:7.0-9.0

References:

Gandolfi, R., (1942). Ricerche micropaleontologiche e stratigraphfiche sulla Scaglia e sul flysch Cretacici dei Dintorni di Balerna (Canton Ticino). Rivista Italiana Paleontologia, 48: 1-160.


Biticinella breggiensis compiled by the pforams@mikrotax project team viewed: 26-6-2017

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