Nannotax3 - ntax_cenozoic

Birkelundia

Classification: ntax_cenozoic -> Coccolithales -> Coccolithaceae -> Birkelundia
Sister taxa: Coccolithus, Bramletteius, Campylosphaera, Chiasmolithus, Coronocyclus, Cruciplacolithus, Ericsonia, Solidopons ⟩⟨ Birkelundia, Clausicoccus, Craticullithus, Hughesius, Kilwalithus

Daughter taxa (time control age-window is: 0-800Ma)
				Birkelundia arenosa See generic diagnosis

Taxonomy:

Citation: Birkelundia Perch-Nielsen 1971

Rank: Genus

Type species: Birkelundia arenosa Perch-Nielsen 1971

Taxonomic discussion: Simlar to Clausicoccus but the cntral plate appears optically/crystallographically different

Distinguishing features: Central area covered by perforate plate which appears uniformly dark in xpl

Farinacci & Howe catalog pages: Birkelundia *

Search data:

Tags	LITHS: placolith, elliptical, CA: ca_disjunct, grill, vacant, CSPH: equant, monomorphic, CROSS-POLARS: rim-unicyclic, V-prominent, R-prominent,
Metrics	Lith size: 8->12µm;

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 Bartonian Stage (22% up, 40.4Ma, in Bartonian stage). Data source: Total of range of species in this database
First occurrence (base): in lower part of Ypresian Stage (22% up, 54.2Ma, in Ypresian 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. See also: customisable plot Parent: Coccolithaceae

References:

Perch-Nielsen, K. (1971c). Elektronenmikroskopische untersuchungen an Coccolithen und verwandten Formen aus dem Eozan von Danemark. Biologiske Skrifter, Kongelige Danske Videnskabernes Selskab. 18(3): 1-76. gs

Birkelundia compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 27-2-2021

Taxon Search:

Advanced Search

Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=77 Go to Archive.is to create a permanent copy of this page - citation notes

Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information

1000

Notify me of new comments via email.

Remember my form inputs on this computer.