Nannotax3 - ntax_cenozoic - Coccolithaceae

Nannotax3 - ntax_cenozoic - Coccolithaceae Nannotax3 - ntax_cenozoic - Coccolithaceae

Coccolithaceae

Classification: ntax_cenozoic -> Coccolithales -> Coccolithaceae
Sister taxa: Coccolithaceae, Calcidiscaceae ⟩⟨ Hymenomonadaceae, Pleurochrysidaceae

Daughter taxa (time control age-window is: 0-800Ma)		Granddaughter taxa
	Genera with open central area (or very delicate cross)
	Coccolithus Eliptical or circular; central area usually open, may have with simple bar or weak axial cross	C. pelagicus group Coccolithus floralis C. formosus group C. biparteoperculatus group Coccolithus sp.
	Coronocyclus Coccoliths ring-shaped without discrete shields	Coronocyclus nitescens Coronocyclus mesostenos Coronocyclus baileyi Coronocyclus lordii Coronocyclus sp.
	Ericsonia Coccolithus-like coccoliths that are typically circular and have broad upper tube elements that dominate the distal shield. The dominance of the R-unit cycle results in a bright LM XPL image that is distinct from Coccolithus.	Ericsonia monilis Ericsonia subpertusa Ericsonia media Ericsonia orbis Ericsonia staerkeri Ericsonia aliquanta Ericsonia robusta Ericsonia sp.
	Genus with bridge
	Solidopons Rim narrow and central area spanned by an elevated bridge	Solidopons petrae Solidopons sp.
	Genera with central cross
	Cruciplacolithus Coccolith central area spanned by disjunct axial cross that may be rotated by up to 20 degrees.	Cruciplacolithus neohelis Cruciplacolithus kanungoi Cruciplacolithus cruciformis Cruciplacolithus flavius Cruciplacolithus klausii Cruciplacolithus nishii Cruciplacolithus tarquinius Cruciplacolithus asymmetricus Cruciplacolithus edwardsii Cruciplacolithus frequens Cruciplacolithus tenuis Cruciplacolithus intermedius Cruciplacolithus primus Cruciplacolithus subrotundus Cruciplacolithus latipons Cruciplacolithus bornemannii Cruciplacolithus praebornemannii Cruciplacolithus filigranus Cruciplacolithus inseadus Cruciplacolithus sp.
	Pletolithus Eocene lineage of large to extremely large Cruciplacolithus-like coccoliths	Pletolithus gigas Pletolithus giganteus Pletolithus mutatus Pletolithus staurion Pletolithus opdykei Pletolithus hulliae
	Campylosphaera Like Cruciplacolithus but the coccoliths are longitudinally arched and typically near parallel sided, and so appear oblong in outline	Campylosphaera dela Campylosphaera differta Campylosphaera eodela Campylosphaera eroskayi Campylosphaera sp.
	Bramletteius Like Cruciplacolithus but coccoliths small and with large, thin, paddle-like processes.	Bramletteius cultellus Bramletteius serraculoides Bramletteius sp.
	Chiasmolithus Placolith coccoliths with Coccolithus-type shields and tube, but with disjunct diagonal cross bars spanning the central area.	C. bidens group C. consuetus group Chiasmolithus sp.
	Genera with central grill or plate
	Birkelundia Central area covered by perforate plate which appears uniformly dark in xpl	Birkelundia arenosa
	Clausicoccus Rim structure like Coccolithus; perforate plate covers the central area on the distal side	Clausicoccus fenestratus Clausicoccus norrisii Clausicoccus subdistichus Clausicoccus vanheckiae Clausicoccus sp.
	Craticullithus Placolith coccoliths with a wide central-area typically spanned by multi-element lattice-like grills or imperforate plates.	Craticullithus cancellus Craticullithus clathrus Craticullithus lamina Craticullithus cassus Craticullithus sp.
	Hughesius Placolith coccoliths showing low birefringence with central area filled by 2 to 4 plates. Lacks a clearly birefringent distal tube cycle	Hughesius gizoensis Hughesius tasmaniae Hughesius youngii Hughesius sp.
	Kilwalithus Placolith coccoliths, typically small (c. 3 microns), with central-area spanned by a finely perforate net. The distal shield is typically bicyclic and the rim structure appears to be coccolithacean.	Kilwalithus cribrum

Romein 1979 fig35.png

Taxonomy:

Citation: Coccolithaceae Poche, 1913 emend. Young & Bown, 1997

Rank: Family

Distinguishing features:
Parent taxon (Coccolithales): 2N: Mostly placolith heterococcoliths with V-unit forming the distal shield; R-unit the proximal shield. Non-motile
N: Form holococcoliths formed of single block, or non-calcifying
This taxon: 2N: cells non-motile, bearing placoliths with R-unit extending from proximal shield to form upper/inner tube-cyle, mostly elliptical
N: cells motile, holococcolith-bearing

Farinacci & Howe catalog pages: Coccolithaceae [no catalog entry yet]

Morphology:

Heterococcoliths are placoliths with rim structure similar to Coccolithus: V-unit forms both distal shield and lower cycle of central-area; R-unit forms both proximal shield and upper cycle of central-area. The proximal shield itself is bicyclic with distinct upper and lower layers but these are both formed from the R-unit. The central-area is often spanned by disjunct structures and these are used to define various fossil genera (see e.g. Perch-Nielsen 1985, Young & Bown 1997,Young & Henriksen 2003).

Biology & life-cycles

Modern Coccolithus pelagicus has a holococcolith stage

Search data:

Lith size: 8->12µm;

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: Total of range of species in this database
First occurrence (base): at base of Danian Stage (0% up, 66Ma, in Danian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
Neptune data: this is a higher taxon page so Neptune data is not plotted. For the customisable plot option go to a genus page Parent: Coccolithales

References:

Perch-Nielsen, K. (1985). Cenozoic calcareous nannofossils. In, Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge 427-555. gs

Poche, F. (1913). Das System der Protozoa. Archiv für Protistenkunde. 30: 125-321. gs

Romein, A. J. T. (1979). Lineages in Early Paleogene calcareous nannoplankton. Utrecht Micropaleontological Bulletin. 22: 1-231. gs O

Young, J. R. & Bown, P. R. (1997). Cenozoic calcareous nannoplankton classification. Journal of Nannoplankton Research. 19(1): 36-47. gs

Young, J. R. & Henriksen, K. (2003). Biomineralization within vesicles: the calcite of coccoliths. Reviews in Mineralogy and Geochemistry. 54(1): 189-215. gs

Coccolithaceae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 8-6-2023

Taxon Search:

Advanced Search

AphiaID: 178597 Nomenclatural data on WoRMS
Short stables page link: https://mikrotax.org/Nannotax3/index.php?id=313 Go to Archive.is to create a permanent copy of this page - citation notes

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