Nannotax3 - ntax_mesozoic - Eiffellithus windii Nannotax3 - ntax_mesozoic - Eiffellithus windii

Eiffellithus windii


Classification: ntax_mesozoic -> Eiffellithales -> Eiffellithaceae -> Eiffellithus -> Eiffellithus windii
Sister taxa: E. eximius, E. lindiensis ⟩⟨ E. gorkae, E. keio, E. parallelus, E. pospichalii, E. turriseiffelii ⟩⟨ E. collis, E. equibiramus, E. parvus ⟩⟨ E. monechiae, E. praestigium, E. vonsalisiae, E. hancockii, E. paragogus ⟩⟨ E. primus, E. striatus, E. windii, E. sp.

Distinguishing features:
Parent taxon (Eiffellithus): Loxolith coccoliths with a prominent inner rim cycle that is birefringent and conspicuous in cross-polarised light; this cycle is broader than the outer rim cycle. The central area is spanned by variably-orientated cross-bars.
This taxon: Small to medium sized species of Eiffellithus (<6.4µm) with a narrow central-area almost filled by diagonal cross-bars.


Taxonomy:

Citation: Eiffellithus windii Applegate & Bergen, 1988
taxonomic rank: Species

Farinacci & Howe catalog pages: E. windii *

Distinguishing features:
Parent taxon (Eiffellithus): Loxolith coccoliths with a prominent inner rim cycle that is birefringent and conspicuous in cross-polarised light; this cycle is broader than the outer rim cycle. The central area is spanned by variably-orientated cross-bars.
This taxon: Small to medium sized species of Eiffellithus (<6.4µm) with a narrow central-area almost filled by diagonal cross-bars.


Morphology:

The highest occurrence of E. windii is not well constrained (?Lower Hauterivian) but there is a definite switch in dominance from E. windii-types to E. striatus-types in the uppermost Valanginian/lowermost Hauterivian.

Most likely ancestor: Eiffellithus primus - at confidence level 2 (out of 5). Data source: Applegate & Bergen 1988.
Likely descendants: Eiffellithus striatus; plot with descendants

Search data:
LITHS: murolith, elliptical, CA: ca_disjunct, plate, process, diagonal cross, closed, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Lith size: 5->6.4µm;
Data source notes: max size follows Applegate & Bergen (1988); min size from illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): in lower part of NC4 zone (20% up, 132.2Ma, in Hauterivian stage). Data source: Bown et al. 1998 (fig 5.1)
First occurrence (base): at base of BC4b subzone (0% up, 135.9Ma, in Valanginian stage). Data source: Bown et al. 1998 - sub-zonal marker, base of BC4b and CC3b

Plot of occurrence data:

References:

Applegate, J. L. & Bergen, J. A. (1988). Cretaceous calcareous nannofossil biostratigraphy of sediments recovered from the Galicia Margin, ODP Leg 103. Proceedings of the Ocean Drilling Program, Scientific Results. 103: 293-348. gs O

Bown, P. R. & Concheyro, A. (2004). Lower Cretaceous calcareous nannoplankton from the Neuquen Basin, Argentina. In, Villa, G., Lees, J. A. & Bown, P. R. (eds) Calcareous Nannofossil Palaeoecology and Palaeocenographic Reconstructions, Proceedings of the INA9 conference, Parma 2002. Marine Micropaleontology . 52(1-4): 51-84. gs

Bown, P. R. (2005c). Early to Mid-Cretaceous Calcareous Nannoplankton from the Northwest Pacific Ocean, Leg 198, Shatsky Rise. Proceedings of the Ocean Drilling Program, Scientific Results. 198: 1-82. gs O

Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Lower Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 86-131. gs O

Bralower, T. J., Monechi, S. & Thierstein, H. R. (1989). Calcareous nannofossil zonation of the Jurassic-Cretaceous boundary interval and correlation with the geomagnetic polarity timescale. Marine Micropaleontology. 14: 153-235. gs

Wind, F. H. & Cepek, P. (1979). Lower Cretaceous calcareous nannoplankton from DSDP Hole 397A (northwest African Margin). Initial Reports of the Deep Sea Drilling Project. 47A: 221-235. gs


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Eiffellithus windii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-4-2024

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10423 Go to Archive.is to create a permanent copy of this page - citation notes
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