Nannotax3 - ntax_cenozoic - Holococcolithophora dentata Nannotax3 - ntax_cenozoic - Holococcolithophora dentata

Holococcolithophora dentata


Classification: ntax_cenozoic -> Holococcoliths -> flat-topped -> Holococcolithophora -flat -> Holococcolithophora dentata
Sister taxa: H. cialdii, H. dentata

Taxonomy:

Citation: Holococcolithophora dentata (Kleijne, 1991) Jordan et al. 2004
taxonomic rank: species
Basionym: Calyptrosphaera dentata Kleijne, 1991
Synonyms:
Taxonomic discussion: The genus Calyptrosphaera is a junior synonym of Syracosphaera and this species is not obviously similar to the other species conventionally placed in Calyptrosphaera, so leaving it in that genus is not viable. We follow Jordan et al. 2004 and Young 2023 in transferring it to Holococcolithophora.

Distinguishing features:
Parent taxon (Holococcolithophora -flat): Monomorphic - cavate
Coccoliths with broad rim and recessed distal cover without boss

This taxon: Liths with broad rim, which rises slightly higher than the central cover; cover with hexagonal mesh fabric; one tooth-like boss on the rim.

Farinacci & Howe catalog pages: C. dentata *


Morphology:

Monomorphic, tube wall flaring with basal flange, tiered fabric, double thickness. Tooth-like boss developed from tube near one end of lith. Distal cover flat, recessed below tube top, coarse hexagonal mesh fabric.

Size:
Liths 2.5-3 µm

Search data:
LITHS: holococcolith, elliptical, hollow, CA: pores,
CSPH: equant, monomorphic, CROSS-POLARS: V-prominent, R-prominent,
Lith size: 2.5->3.3µm; Coccosphere size: 11->15µm; Liths per sphere: 45->150
Data source notes: morphom data from Yang & Wei (2003), Cros & Fortuño (2002) & Kleijne 1991
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:

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

Jordan, R. W., Cros, L. & Young, J. R. (2004). A revised classification scheme for living Haptophytes. Micropaleontology. 50(supplement 1): 55-79. gs

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

Young, J. R. (2023). Some proposed changes to the systematics of Cenozoic and Mesozoic nannoplankton. Journal of Nannoplankton Research. 41(1): 15-25. 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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Holococcolithophora dentata compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 26-5-2024

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=218 Go to Archive.is to create a permanent copy of this page - citation notes
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