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Eohastigerinella


Classification: pf_mesozoic -> Globigerinelloididae -> Eohastigerinella
Sister taxa: Eohastigerinella, Globigerinelloides, Hastigerinoides, Pseudoschackoina,
Daughter taxa (blue => in age window 0-300Ma)

Specimens which cannot be assigned to established species

Taxonomy

Citation: Eohastigerinella Morozova 1957
Rank: Genus
Basionym: Hastigerinella watersi
Type species: Hastigerinella watersi Cushman, 1931

Type images:

Original description: Eohastigerinella:

Entries in the Catalog of original descriptions: Eohastigerinella;

Distinguishing features: Test planispirally enrolled and involute, biumbilicate, early chambers globular and inflated, later ones radially elongate, and final one or two chambers clavate, sutures distinct, depressed; wall calcareous, moderately coarsely perforate, radial, surface pitted; aperture equatorial, an interiomarginal arch bordered with a distinct lip, lateral extremities of the aperture commonly remaining open as relict supplementary apertures around the umbilicus as new chambers are added.

Geological Range:
Last occurrence (top): within Santonian Stage (83.64-86.26Ma, top in Santonian stage). Data source: Total of range of species in this database
First occurrence (base): within Coniacian Stage (86.26-89.77Ma, base in Coniacian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous

References:

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


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Eohastigerinella compiled by the pforams@mikrotax project team viewed: 27-5-2018

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