pforams@mikrotax - Anaticinella planoconvexa pforams@mikrotax - Anaticinella planoconvexa

Anaticinella planoconvexa


Classification: pf_mesozoic -> Rotaliporidae -> Anaticinella -> Anaticinella planoconvexa
Sister taxa: A. multiloculata, A. planoconvexa, A. sp.

Taxonomy

Citation: Anaticinella planoconvexa (Longoria 1973)
taxonomic rank: Species
Basionym: Pseudoticinella planoconvexa
Taxonomic discussion:

 

Type images:

Original description:

Same features as in the genus. Test large, planoconvex, umbilical side flattened, spiral side strongly convex; formed by about three whorls; peripheral margin ovate; five to six chambers in the last whorl, increasing gradually in size as added; chambers petalloid to trapezoidal on spiral side, ovoid to sub-rectangular on umbilical side; sutures radial, straight and depressed on both spiral and umbilical side; primary aperture umbilical to extra-umbilical, bordered by wide imperforate portici, infra-laminal apertures visible at the base of the sutures; umbilicus partially covered by the umbilical cover-plate; surface of the test covered by numerous pustules.

Entries in the Catalog of original descriptions: Pseudoticinella planoconvexa


Size:
Holotype = 0.46 mm in the maximum diameter, 0.33 mm in the minimum diameter,

Geological Range:
Last occurrence (top): near base of W. archaeocretacea zone (10% up, 94Ma, in Cenomanian stage). Data source: 2007 Cretaceous Research 28(4):561-582
First occurrence (base): near top of R. cushmani zone (90% up, 94.5Ma, in Cenomanian stage). Data source: 2007 Cretaceous Research 28(4):561-582

Plot of range and occurrence data:

References:


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Anaticinella planoconvexa compiled by the pforams@mikrotax project team viewed: 21-4-2024

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Short stable page link: https://mikrotax.org/pforams/index.php?id=110008 Go to Archive.is to create a permanent copy of this page - citation notes



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