pforams@mikrotax - Eohastigerinella pforams@mikrotax - Eohastigerinella


Classification: pf_mesozoic -> Globigerinelloididae -> Eohastigerinella
Sister taxa: Eohastigerinella, Globigerinelloides, Hastigerinoides, Laeviella, Planohedbergella, Polycamerella, Pseudoschackoina
Daughter taxa (time control age-window is: 0-800Ma)
Eohastigerinella watersi

Eohastigerinella sp.
Specimens which cannot be assigned to established species


Citation: Eohastigerinella Morozova 1957
taxonomic rank: Genus
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:
Parent taxon (Globigerinelloididae): Test planispiral, chambers globular to radially elongate; aperture at the base of the chamber face and equatorial in position, lateral portions of primary aperture may remain open as new chambers are added, forming relict openings around the umbilical region.
This taxon: 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): at top of D. asymetrica zone (100% up, 83.7Ma, in Santonian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within D. asymetrica zone (83.65-85.60Ma, base in Santonian stage). Data source: Total of ranges of species in this database

Plot of range and occurrence data:


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


Eohastigerinella compiled by the pforams@mikrotax project team viewed: 25-6-2024

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