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Nannotax3 - ntax_cenozoic - Ophiaster reductus Nannotax3 - ntax_cenozoic - Ophiaster reductus

Ophiaster reductus


Classification: ntax_cenozoic -> Syracosphaerales -> Syracosphaeraceae -> Ophiaster -> Ophiaster reductus
Sister taxa: O. macrospinus, O. formosus, O. hydroideus, O. reductus, O. minimus, O. formosus var. inversus, O. sp.

Taxonomy:

Citation: Ophiaster reductus Manton & Oates, 1983
Taxonomic rank: species
Type species: .
Taxonomic discussion: m

Distinguishing features:
Parent taxon (Ophiaster): Appendages formed from strings of highly modified antapical coccoliths, without whorl coccoliths
This taxon: BCs - with laths but no axial structure. Cycle of small antapical BCs with open central area surrounds whorl; link coccoliths often with single spine

Farinacci & Howe catalog pages: Ophiaster reductus

Search data:
LITHS: murolith, elliptical, CA: ca_disjunct, grill, process,
CSPH: elongated, equant, appendages, CFC, AAC, XC, CROSS-POLARS: T-prominent, R-prominent,
Lith size: 0.8->1.5µm; Coccosphere size: 5->8µm; Liths per sphere: 50->100
Data source notes: csph & lith length (BCs) from illustrated specimens; lith numbers from Yang & Wei 2003, range inferred from single estimate
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:

Malinverno, E., Leoni , B. & Galli, P. (2022). Coccolithophore assemblages and a new species of Alisphaera from the Faafu Atoll, Maldives, Indian Ocean. Marine Micropaleontology. 172(102110): 1-16. gs

Manton, I. & Oates, K. (1983). Nanoplankton from the Galapagos Islands: Two genera of spectacular coccolithophorids (Ophiaster and Calciopappus) with special emphasis on unmineralized periplast components. Philosophical Transactions of the Royal Society of London. 300: 435-462. 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. S1: 1-132. gs


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Ophiaster reductus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 19-4-2025

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=966 Go to Archive.is to create a permanent copy of this page - citation notes
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