Distinguishing features: Small to medium sized species of Eiffellithus (<6.4µm) with a narrow central-area almost filled by diagonal cross-bars.
Taxonomy:
Farinacci & Howe catalog pages: E. windii *
Distinguishing features: 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;
Tags | LITHS: murolith, elliptical, CA: ca_disjunct, plate, process, diagonal cross, closed, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent, |
Metrics | Lith size: 5->6.4µm; Data source notes: max size follows Applegate & Bergen (1988); min size from illustrated specimens |
Geological Range:
Last occurrence (top): within NC4 zone (132.87-132.93Ma, top in Hauterivian stage). Data source: Bown et al. 1998
First occurrence (base): at base of BC4b subzone (0% up, 137.1Ma, in Valanginian stage). Data source: Bown et al. 1998 - zonal marker
Plot of occurrence data:
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 V 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 V O Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Early Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 86-131. gs 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 V OReferences:
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Eiffellithus windii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-3-2021
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