Eiffellithus eximius


Classification: ntax_mesozoic -> Eiffellithales -> Eiffellithaceae -> Eiffellithus -> Eiffellithus eximius
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: Large Eiffellithus with axial or sub-axial cross bars, longer cross-bar often with bifurcate tips


Taxonomy:

Citation: Eiffellithus eximius (Stover, 1966) Perch-Nielsen, 1968
Rank: Species
Basionym: Clinorhabdus eximius Stover, 1966
Variants: Shamrock and Watkins (2009) infer that forms with and without bifurcations  are separate lineages and so divide E. eximus into forms with bifurcations (E. augustus) and those without (E. eximius) and further separate in each lineage forms with oblique crosses (20-45° from the long axis of the coccolith) and forms with axial crosses (0-20°) from the long axis). This leads to a scheme of four species. However, the forms intergrade and there appears to be remarkable parallelism in the evolution in the two sugested lineages. Likewise the smaller form E. nudus has virtually the same range as the larger typical E. eximius, so it is not clear that it is worth separating.

Farinacci & Howe catalog pages: C. eximius * , E. augustus + * , E. digitatus * , E. perchneilseniae [no catalog entry yet], E. nudus *

Distinguishing features: Large Eiffellithus with axial or sub-axial cross bars, longer cross-bar often with bifurcate tips

Most likely ancestor: Eiffellithus turriseiffelii - at confidence level 3 (out of 5). Data source: Verbeek 1977, Shamrock & Watkins 2009.

Search data:
TagsLITHS: murolith, elliptical, CA: cross-axial, ca_disjunct, plate, process, closed, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
MetricsLith size: 6->14µm;
Data source notes: Shamrock & Watkins (2009) - range of sizes of forms included here in E. eximius vs 7-11µm for E. eximius (ss)
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within UC15 zone (75.93-80.97Ma, top in Campanian stage). Data source: Burnett 1998 (zonal marker)
First occurrence (base): at base of UC8a subzone (0% up, 93Ma, in Turonian stage). Data source: Burnett 1998 (zonal marker), fig.6.3

Plot of occurrence data:

References:

Bukry, D. (1969). Upper Cretaceous coccoliths from Texas and Europe. University of Kansas Paleontological Contributions, Articles. 51 (Protista 2): 1-79. gs V O

Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs V O

Cepek, P. (1978). Mesozoic calcareous nannoplankton of the Eastern North Atlantic, Leg 41. Initial Reports of the Deep Sea Drilling Project. 41: 667-687. gs V O

Crux, J. A. (1980). A biostratigraphical study of Upper Cretaceous nannofossils from South-east England and North France. PhD thesis, University College London. -. gs

Hattner, J. G. & Wise, S. W. (1980). Upper Cretaceous calcareous nannofossil biostratigraphy of South Carolina. South Carolina Geology. 24: 41-117. gs

Hill, M. E. & Bralower, T. J. (1987). Early evolution, stratigraphy and taxonomy of Eiffellithus eximius and closely-related species. In, Stradner, H. , & Perch Nielsen, K, (eds) Proceedings of the INA Meeting, Vienna 1985. Abhandlungen der Geologischen Bundesanstalt. 39: 89-97. gs V O

Lees, J. A. & Bown, P. R. (2005). Upper Cretaceous calcareous nannofossil biostratigraphy, ODP Leg 198 (Shatsky Rise, Northwest Pacific Ocean). Proceedings of the Ocean Drilling Program, Scientific Results. 198: 1-60. gs V O

Perch-Nielsen, K. (1968c). Der Feinbau und die Klassifikation der Coccolithen aus dem Maastrichtien von Danemark. Biologiske Skrifter, Kongelige Danske Videnskabernes Selskab. 16: 1-96. gs

Püttmann, T. & Mutterlose, J. (2019). Calcareous nannofossils from a Late Cretaceous nearshore setting. Journal of Nannoplankton Research. S4: 81-88. gs V O

Püttmann, T., Linnert, C., Dölling, B. & Mutterlose, J. (2018). Deciphering Late Cretaceous (Cenomanian to Campanian) coastline dynamics in the southwestern Münsterland (northwest Germany) by using calcareous nannofossils: Eustasy vs local tectonics,. Cretaceous Research. 87: 174-184. gs

Reinhardt, P. (1970). Synopsis der Gauttungen und Arten der mesozoischen Coccolithen und anderer kalkiger Nannofossilien. I, II. Freiberger Forschungshefte. C260, 5-32; C265,: 41-111. gs

Romein, A. J. T., Willems, H. & Mai, H. (1996). Calcareous nannoplankton of the Geulhemmerberg K/T boundary section, Maastrichtian type area, the Netherlands. Geologie en Mijnbouw. 75: 231-238. gs

Shamrock, J. L. & Watkins, D. K. (2009). Evolution of the Cretaceous calcareous nannofossil genus Eiffellithus and its biostratigraphic significance. Cretaceous Research. 30(5): 1083-1102. gs

Stover, L. E. (1966). Cretaceous coccoliths and associated nannofossils from France and the Netherlands. Micropaleontology. 12(2): 133-167. gs

Thibault, N. (2010). Calcareous nannofossils from the boreal Upper Campanian- Maastrichtian chalk of Denmark. Journal of Nannoplankton Research. 31(1): 39-56. gs V O

Varol, O. & Girgis, M. (1994). New taxa and taxonomy of some Jurassic to Cretaceous calcareous nannofossils. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 192: 221-253. gs


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Eiffellithus eximius compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 21-4-2021

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