Nannotax3 - Mesozoic - Eiffellithales

Eiffellithales

Classification: Mesozoic -> Eiffellithales
Sister taxa: Arkhangelskiales, Eiffellithales, Stephanolithiales, Podorhabdales, Watznaueriales, Syracosphaerales, Heterococcoliths inc sedis, Holococcoliths, Braarudosphaerales, Nannoliths inc sedis, Mesozoic non–coccoliths, hidden,

Distinguishing features: Murolith coccoliths with a distal/outer cycle of clockwise-imbricating elements.

Daughter taxa: (blue => in age window 0-800Ma)		Granddaughter taxa
	Chiastozygaceae Murolith (loxolith type) coccoliths with variably-developed proximal/inner cycles and central-areas typically spanned by axial, non-axial or diagonal cross-bars or a single transverse bar, which is commonly formed from four fused arms/bars. LM images may be unicyclic or bicyclic.	Amphizygus Archaeozygodiscus Gorkaea Placozygus Reinhardtites Tranolithus Zeugrhabdotus Staurolithites Diadorhombus Rhabdophidites Ahmuellerella Bukrylithus Heteromarginatus Misceomarginatus Monomarginatus Neocrepidolithus Vacherauvillius Chiastozygus Braloweria Clepsilithus Crepidolithus Loxolithus Tubirhabdus
	Eiffellithaceae Murolith (loxolith type) coccoliths with well-developed proximal/inner cycles and typically wide central-areas spanned by axial, non-axial (± asymmetric) or diagonal cross-bars. The broad, proximal/inner cycle is conspicuous in the LM, creating a strongly bicyclic image.	Diloma Eiffellithus Helicolithus Tegumentum
	Rhagodiscaceae Murolith (loxolith type) coccoliths with dominant distal/outer cycles and central-areas typically filled by a plate of granular calcite. The central structure may be spine-bearing, perforate or massive. LM images are typically unicyclic.	Calcicalathina Percivalia Rhagodiscus Zebrashapka

Taxonomy:

Citation: Eiffellithales Rood et al., 1971

Rank: Order

Farinacci & Howe catalog pages: Eiffellithales [no catalog entry yet]

Distinguishing features: Murolith coccoliths with a distal/outer cycle of clockwise-imbricating elements.

Geological Range:
Last occurrence (top): at base of Ypresian Stage (1% up, 55.9Ma, in Ypresian stage). Data source: Total of range of species in this database
First occurrence (base): in mid part of Norian Stage (50% up, 218.9Ma, in Norian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Neptune data: this is a higher taxon page so Neptune data is not plotted. For the customisable plot option go to a genus page Parent: Mesozoic

References:

Bown, P. R. (1998b). Triassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 29-33. gs

Rood, A. P., Hay, W. W. & Barnard, T. (1971). Electron Microscope Studies of Oxford Clay Coccoliths. Eclogae Geologicae Helvetiae. 64: 245-272. gs

Eiffellithales compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 15-12-2019

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10405 Go to Archive.is to create a permanent copy of this page - citation notes

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