Orcadia (protist)
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]
| Orcadia | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Clade: | Diaphoretickes |
| Clade: | SAR |
| Phylum: | Retaria |
| Infraphylum: | Foraminifera |
| Class: | Globothalamea |
| Order: | Globigerinida |
| Family: | Globigerinellidae |
| Genus: | Orcadia Boltovskoy & Watanabe 1982 |
| Type species | |
| Hastigerinella riedeli Rögl & Bolli 1973 | |
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
- Brummer GA, Kučera M (2022). "Taxonomic review of living planktonic foraminifera". Journal of Micropalaeontology. 41: 29–74. doi:10.5194/jm-41-29-2022.
- Arenillas I, Arz JA, Gilabert V (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. doi:10.7203/sjp.22189. ISSN 2255-0550.
- Holmes NA (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. doi:10.2113/gsjfr.14.2.101.
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