Nannotax3 - ntax_cenozoic - Syracosphaera origami HOL

Syracosphaera origami HOL


Classification: ntax_cenozoic -> Holococcoliths -> tubeless -> Syracosphaera HOL (Anthosphaera type) -> Syracosphaera origami HOL
Sister taxa: S. molischii HOL, S. lafourcadii HOL, S. origami HOL, S. periperforata HOL, S. rotaconica HOL, S. marginiporata HOL, S. elevata HOL, S. HOL (Anthosphaera type) sp.

Taxonomy:

Citation: Syracosphaera origami (Cros & McGrane 2014) Archontikis et al. 2020 HOL
Rank: Species
Synonyms:

Taxonomic discussion:
Although combination coccospheres not known for this species Archontikis et al. (2020) transfered it to Syracosphaera, since the forms previously included in Anthosphaera are well-characterised and two of them, including the generotype, have been shown to form combination coccospheres with Syracosphaera HET phases.

Distinguishing features:
Parent taxon (Syracosphaera HOL (Anthosphaera type)): fried egg shape, dimorphic (CFCs with large leaf-like process)
This taxon: Coccoliths ornamented; BCs with large perforations separated by radial rows of crystallites; concave distal surface with flange and triangular central boss. CFCs with complex blade ending in spine-like rows of crystallites.

Farinacci & Howe catalog pages: A. origami *


Morphology: Coccosphere, usually spherical, composed of c. 40–80 BCs and c. 5–10 CFCs, all ornament- ed. BCs elliptical with a two crystallites-width rim, which supports c. 10 robust radial struts of about three crystallites separated by large perforations. The perforate cycle supports a concave distal cover with a central triangular apical boss that is flattened parallel to the long axis of the coccolith. CFCs elliptical and their rim supports an ornamented arched process ending distally in c. 6 spine-like struts of crystallites and a central tri- angular apical spine. Within the arch, oblique buttress-like sets occur giving an ornamented appearance. [Archontikis et al. 2020]

Size: Coccosphere ca. 5 µm; body coccolith length 1.0 – 1.4 µm; body coccolith width ca. 0.8 µm; body coccolith height ca. 0.8 µm; circum-flagellar coccolith (long axis) ca. 1µm; circum-flagellar coccolith height ca. 1-2 µm.

Search data:
TagsLITHS: holococcolith, elliptical, cylindrical, hollow, CA: pores, process,
CSPH: equant, elongated, CFC,
MetricsLith size: 1->1.4µm; Coccosphere size: 4->6µm; Liths per sphere: 40->80
Data source notes: morphom data from Cros & Fortuño (2002), Archontikis et al. 2020
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
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source: JRY

Plot of occurrence data:

References:

Archontikis, O. A, Young, J. R. & Cros, L. (2020). Taxonomic revision and classification of extant holococcolithophores previously placed in the Genus Anthosphaera Kamptner emend. Kleijne 1991. Acta Protozoologica. 59: 121-139. gs

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

Cros, L. & McGrane, P. B. (2014). Anthosphaera origami sp. nov., a planktonic coccolithophore with characteristic paper-boat-shaped structures. Journal of Nannoplankton Research. 34(special): 23-25. gs V O


nannotaxlogo400px

Syracosphaera origami HOL compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 9-12-2021

Taxon Search:
Advanced Search

Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=50 Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics