pforams@mikrotax

Orcadia

Classification: pf_cenozoic -> Hastigerinidae -> Orcadia
Sister taxa: Hastigerina, Hastigerinella, Orcadia,

Daughter taxa: (blue => in age window 0-800Ma)
			Orcadia riedeli monospecific
			Orcadia sp. Specimens which cannot be assigned to established species

Taxonomy

Citation: Orcadia Boltovskoy & Watanabe, 1982

Rank: genus

Type species: Hastigerinella riedeli

Catalog entries: Orcadia;

Type images:

Distinguishing features: Spine bases at chamber tips:

NB These concise distinguishing features statements are used in the tables of daughter-taxa to act as quick summaries of the differences between e.g. species of one genus.
They are being edited as the site is developed and comments on them are especially welcome.

Description

Biogeography and Palaeobiology

Most likely ancestor: Hastigerina - at confidence level 1 (out of 5). Data source: Kennett & Srinivasan 1983 - based on tentative suggestion that O. riedeli evolved from H. pelagica .

Biostratigraphic distribution

Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): near top of Gelasian Stage (85% up, 1.9Ma, in Gelasian 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: Hastigerinidae

References:

Boltovskoy, E. & Watanabe, S. (1982). Orcadia, nuevo genero de Foraminiferos planctonicos Antarticos. Revista Española de Micropaleontología, 14: 5-11. GS

Orcadia compiled by the pforams@mikrotax project team viewed: 16-6-2019

Taxon Search:

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Short stable page link: http://mikrotax.org/pforams/index.php?id=104185 Go to Archive.is to create a permanent copy of this page - citation notes

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