Homozygosphaera triarcha


Classification: ntax_cenozoic -> Holococcoliths -> bridged -> Homozygosphaera -> Homozygosphaera triarcha
Sister taxa: H. spinosa, H. triarcha, S. arethusae HOL, H. sp.

Taxonomy:

Citation: Homozygosphaera triarcha Halldal & Markali, 1955
Rank: Species

Distinguishing features: Like H. arethusae but bridge has three struts (Y-shaped in plan view) and supports spine.

Farinacci & Howe catalog pages: H. triarcha *


Size: Liths ca. 2.5 µm long, 2-3 µm high

Search data:
TagsLITHS: holococcolith, elliptical, hollow, CA: plate, process, bar,
CSPH: equant, monomorphic, CROSS-POLARS: R-prominent,
MetricsLith size: 1.7->3µm; Coccosphere size: 10->13µm; Liths per sphere: 70->130
Data source notes: morphom data from Yang & Wei (2003), Cros & Fortuño (2002)
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): Extant Data source: present in the plankton (Young et al. 2003)
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source: [JRY rough estimate]

Plot of occurrence data:

References:

Andruleit, H., Rogalla, U. & Staeger, S. (2005). Living coccolithophores recorded during the onset of upwelling conditions off Oman in the western Arabian Sea. Journal of Nannoplankton Research. 27(1): 1-14. gs V O

Cros, L. & Fortuño, J. -M. (2002). Atlas of northwestern Mediterranean coccolithophores. Scientia Marina. 66: 1-186. gs V O

Halldal, P. & Markali, J. (1955). Electron microscope studies on coccolithophorids from the Norwegian Sea, the Gulf Stream and the Mediterranean. Avhandlinger utgitt av det Norske Videnskapsakademi i Oslo. Matematisk-Naturvidenskapelig Klasse. 1955(1): 1-30. gs

Kleijne, A. (1991). Holococcolithophorids from the Indian Ocean, Red Sea, Mediterranean Sea and North Atlantic Ocean. Marine Micropaleontology. 17: 1-76. gs

Okada, H. & McIntyre, A. (1977). Modern coccolithophores of the Pacific and North Atlantic Oceans. Micropaleontology. 23(1): 1-55. gs

Yang, T-N., Wei, K-Y. & Gong G-C. (2001). Distribution of coccolithophorids and coccoliths in surface ocean off northeastern Taiwan. Botanical Bulletin of the Academia Sinica. 42: 287-302. gs

Young, J. R., Geisen, M., Cros, L., Kleijne, A., Probert, I. & Ostergaard, J. B. (2003). A guide to extant coccolithophore taxonomy. Journal of Nannoplankton Research, Special Issue. 1: 1-132. gs V O


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Homozygosphaera triarcha compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 13-4-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=730 Go to Archive.is to create a permanent copy of this page - citation notes



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