pforams@mikrotax - Eohastigerinella

pforams@mikrotax - Eohastigerinella pforams@mikrotax - Eohastigerinella

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

Taxonomy

Citation: Eohastigerinella Morozova 1957

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): in upper part of Santonian Stage (79% up, 84.2Ma, in Santonian stage). Data source: Total of range of species in this database
First occurrence (base): near top of Coniacian Stage (87% up, 86.7Ma, in Coniacian stage). Data source: Total of range of species in this database

Plot of range and occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Globigerinelloididae

References:

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: 20-3-2023

Taxon Search:

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AphiaID: 722168 Nomenclatural data on WoRMS
Short stable page link: https://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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