Taxonomy
Original description: Test à partie initiale réduite et effilée, composée de loges nettement croissantes, suivies dans l'adulte de loges croissantes, presque globuleuses et assez régulières à la périphérie des flancs, nettement allongées et reniformes à leur intérieur. Surface très finement striée longitudinalement.
Translation: Test showing a reduced and fringed initial part, with chambers increasing sharply in size as added; mature chambers enlarging as added, almost globular and fairly regular at the periphery of the sides, sharply elongated and reniform in their internal part. Surface finely striated longitudinally.
Entries in the Catalog of original descriptions: Ventilabrella reniformis
Emended description:
Character matrix
| test outline: | Palmate | chamber arrangement: | Multiserial | edge view: | Compressed | aperture: | Interiomarginal |
| sp chamber shape: | Reniform | coiling axis: | N/A | periphery: | N/A | aperture border: | Thin lip |
| umb chbr shape: | Reniform | umbilicus: | N/A | periph margin shape: | N/A | accessory apertures: | None |
| spiral sutures: | Strongly depressed | umb depth: | N/A | wall texture: | Pore mounds | shell porosity: | Microperforate: <1µm |
| umbilical or test sutures: | Strongly depressed | final-whorl chambers: | 2-2 | N.B. These characters are used for advanced search. N/A - not applicable | |||
Most likely ancestor:
Laeviheterohelix pulchra - at confidence level 1 (out of 5). Data source: .
Geological Range:
Last occurrence (top): within Campanian Stage (72.17-83.65Ma, top in Campanian stage). Data source: [copied from Chronos database]
First occurrence (base): within H. helvetica zone (92.51-93.52Ma, base in Turonian stage). Data source: [copied from Chronos database]
Plot of range and occurrence data:
Haynes, S., Huber, B. T. & MacLeod, K. G. (2015). Evolution and phylogeny of mid-Cretaceous (Albian-Coniacian) biserial planktic foraminifera. Journal of Foraminiferal Research. 44: 42-81. gs Marie, P. (1941). Les foraminiferes de la craie a Belemnitella mucronata du Bassin de Paris. Mémoires du Muséum National d'Histoire Naturelle, Paris. 12: 1-296. gs OReferences:

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Laeviheterohelix reniformis compiled by the pforams@mikrotax project team viewed: 13-10-2026
Short stable page link: https://mikrotax.org/pforams/index.php?id=110305 Go to Archive.is to create a permanent copy of this page - citation notes |
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