Daughter taxa: (blue => in age window 0-800Ma) | ||||
Orcadia riedeli monospecific | ||||
Orcadia sp. Specimens which cannot be assigned to established species |
Catalog entries: Orcadia
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.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 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:
Boltovskoy, E. & Watanabe, S. (1982). Orcadia, nuevo genero de Foraminiferos planctonicos Antarticos. Revista Española de Micropaleontología. 14: 5-11. gsReferences:
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Orcadia compiled by the pforams@mikrotax project team viewed: 19-1-2021
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 |