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Laeviheterohelix


Classification: pf_mesozoic -> Heterohelicidae -> Laeviheterohelix
Sister taxa: Heterohelix, Spiroplecta ⟩⟨ Braunella, Hendersonites, Huberella, Laeviheterohelix, Planoheterohelix, Protoheterohelix, Pseudoguembelina, Pseudotextularia ⟩⟨ Planoglobulina, Ventilabrella, Gublerina, Praegublerina, Sigalia, Racemiguembelina ⟩⟨ Lunatriella, Rectoguembelina, Zeauvigerina,
Daughter taxa: (blue => in age window 0-800Ma)






Specimens which cannot be assigned to established species

Taxonomy

Citation: Laeviheterohelix Nederbragt, 1991
Rank: Genus

Original description: Diagnosis: Test calcareous, biserial throughout or with an initial planispiral coil; wall microperforate and smooth with scattered pustules, or with pores situated in the center of a pore mound. Aperture a simple arc, bordered by distinct flanges.

Entries in the Catalog of original descriptions: Laeviheterohelix

Distinguishing features: Biserial throughout, aperture symmetrically positioned, wall smooth, microperforate with irregularly scattered pustule or pore mounds

Geological Range:
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): within Turonian Stage (89.77-93.90Ma, base in Turonian stage). Data source: Total of range of species in this database

Plot of range and occurrence data:

References:

Nederbragt, A. J. (1991). Late Cretaceous biostratigraphy and development of Heterohelicidae (planktic foraminifera). Micropaleontology. 37: 329-372. gs


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Laeviheterohelix compiled by the pforams@mikrotax project team viewed: 20-10-2020

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Short stable page link: http://mikrotax.org/pforams/index.php?id=110300 Go to Archive.is to create a permanent copy of this page - citation notes



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