arrayname: original
Daughter taxa (time control age-window is: 0-800Ma)![]() | ||||
Orcadia riedeli monospecific | ||||
Orcadia sp. Specimens which cannot be assigned to established species |
Catalog entries: Orcadia
Distinguishing features:
Parent taxon (Hastigerinidae): monolamellar, thick spines, thin shell
This taxon: Spine bases at chamber tips:
Phylogenetic relations
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 .
Geological Range:
Last occurrence (top): Extant. Data source: Total of ranges of the species in this database
First occurrence (base): within N22 zone (0.00-1.93Ma, base in Gelasian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Boltovskoy, E. & Watanabe, S. (1982). Orcadia, nuevo genero de Foraminiferos planctonicos Antarticos. Revista Española de Micropaleontología. 14: 5-11. gs Brummer, G-J. A. & Kucera, M. (2022). Taxonomic review of living planktonic foraminifera. Journal of Micropalaeontology. 41: 29-74. gs Brummer, G. J. A., Troelstra, S. R., Kroon, D. & Ganssen, G. M. (1988). Ontogeny, distribution and geologic record of the extant planktonic foraminifer Orcadia riedeli (Rögl & Bolli, 1973). In, Brummer, G. J. A. & Kroon, D. (eds) Planktonic foraminifers as tracers of ocean-climate history. Free University Press, Amsterdam 149-162. gs Holmes, N. A. (1984). An emendation of the genera Beella Banner and Blow, 1960, and Turborotalita Blow and Banner, 1962; with notes on Orcadia Boltovskoy and Watanabe, 1982. Journal of Foraminiferal Research. 14(2): 101-110. gsReferences:
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Orcadia compiled by the pforams@mikrotax project team viewed: 26-3-2025
Short stable page link: https://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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