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Eohastigerinella


Classification: pf_mesozoic -> Globigerinelloididae -> Eohastigerinella
Sister taxa: Eohastigerinella, Globigerinelloides, Hastigerinoides, Pseudoschackoina,
Daughter taxa: (blue => in age window 0-800Ma)

Specimens which cannot be assigned to established species

Taxonomy

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

Original description: Translation from the Russian. - Test planispiral, in the early stage of the microspheric generation trochoidal, not completely involute. Chambers elongate. lobate, digitate, with traces of attached spicules. Aperture slitlike basal. Wall thin, finely canceIlate. perforate.

Family Hantkenininidae. Upper Cretaceous-Eocene.

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. & Tappan, H. (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York. 1-1059. gs :: ::


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Eohastigerinella compiled by the pforams@mikrotax project team viewed: 5-7-2020

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Short stable page link: http://mikrotax.org/pforams/index.php?id=110098 Go to Archive.is to create a permanent copy of this page - citation notes



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