Biology:Orcadia (protist)
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Short description: Genus of shelled amoebae
| Orcadia | |
|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Clade: | SAR |
| Phylum: | Retaria |
| Subphylum: | Foraminifera |
| Class: | Globothalamea |
| Order: | Globigerinida |
| Family: | Globigerinellidae |
| Genus: | Orcadia Boltovskoy & Watanabe 1982 |
| Type species | |
| Hastigerinella riedeli Rögl & Bolli 1973
| |
Orcadia is a monotypic genus of planktonic foraminifera belonging to the order Globigerinida. The phylogenetic position of this genus remains enigmatic; it was originally assigned to the family Hastigerinidae,[1] but was later moved to Globigerinellidae.[2]
Description
Orcadia includes species characterized by a low trochospiral and thin test; an interiomarginal, extraumbilical to umbilical aperture with a rounded lip; and triangular spines located in the distal areas of the test chambers.[3]
References
- ↑ "Taxonomic review of living planktonic foraminifera". Journal of Micropalaeontology 41: 29-74. 2022. doi:10.5194/jm-41-29-2022.
- ↑ "An updated suprageneric classification of planktic foraminifera after growing evidence of multiple benthic-planktic transitions". Spanish Journal of Palaeontology (Sociedad Española de Paleontología) 37 (1): 1–34. 2022. doi:10.7203/sjp.22189. ISSN 2255-0550.
- ↑ "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. 1984. doi:10.2113/gsjfr.14.2.101.
Wikidata ☰ Q13222440 entry
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