Eiffellithus collis

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: Like E. parvus but larger and with longer cross-arms. Medium sized, with blunt terminations to the cross-arms.

Taxonomy:

Farinacci & Howe catalog pages: E. collis *

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: Like E. parvus but larger and with longer cross-arms. Medium sized, with blunt terminations to the cross-arms.

Most likely ancestor: Eiffellithus parvus - at confidence level 3 (out of 5). Data source: Watkins & Bergen 2003.

Geological Range:
Notes: Persists through the Late Cretaceous according Shamrock & Watkins (2009)
Last occurrence (top): within Late Albian Substage (100.50-107.59Ma, top in Albian stage). Data source: original description
First occurrence (base): within BC26 zone (103.27-104.06Ma, base in Albian stage). Data source: original description

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
• Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
• Taxon plotted: Eiffellithus collis, synonyms included - Eiffellithus collis;
• See also space-time plot :: Samples map :: Parent: Eiffellithus

Eiffellithus collis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-9-2024 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10407 Go to Archive.is to create a permanent copy of this page - citation notes

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