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Schackoina


Classification: pf_mesozoic -> Schackoinidae -> Schackoina
Sister taxa: Leupoldina, Schackoina,
Daughter taxa (blue => in age window 0-300Ma)



Taxonomy

Citation: Schackoina Thalmann 1932
Rank: Genus
Basionym: Siderolina cenomana
Type species: Siderolina cenomana Schacko, 1897

Type images:

Original description: Schackoina:

Entries in the Catalog of original descriptions: Schackoina;

Short diagnosis: Test small, with early low trochospiral stage, later nearly planispiral, early chambers globular, later ones radially elongate and laterally compressed, one or more elongate tubulospines extending from the midline of each chamber on the periphery, biumbilicate, sutures depressed; wall calcareous, very finely perforate, optically radial, surface slightly hispid; aperture a low interiomarginal and equatorial arch bordered by a distinct lip, part of the lateral extensions of the aperture into the umbilicus may remain as relict apertures.

Geological Range:
Last occurrence (top): within Campanian Stage (72.05-83.64Ma, top in Campanian stage). Data source: Total of range of species in this database
First occurrence (base): within Albian Stage (100.50-112.95Ma, base in Albian stage). Data source: Total of range of species in this 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.

References:

Loeblich, A.R., Jr. & Tappan, H. (Editors), (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York, 1059 pp.


Schackoina compiled by the pforams@mikrotax project team viewed: 25-6-2017

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