Nannotax3 - ntax_cenozoic - Pontosphaeraceae

Nannotax3 - ntax_cenozoic - Pontosphaeraceae Nannotax3 - ntax_cenozoic - Pontosphaeraceae

Pontosphaeraceae

Classification: ntax_cenozoic -> Zygodiscales -> Pontosphaeraceae
Sister taxa: Helicosphaeraceae, Pontosphaeraceae, Zygodiscaceae

Daughter taxa (time control age-window is: 0-800Ma)		Granddaughter taxa
	Pontosphaera Coccoliths are muroliths, central area with variable number of perforations. V-units form narrow imbricate outer wall, R-units form inner wall and central-area.	Pontosphaera multipora Pontosphaera discopora Pontosphaera distincta Pontosphaera enormis Pontosphaera desuetoidea Pontosphaera geminipora Pontosphaera longiforaminis Pontosphaera megapachydisca Pontosphaera veta Pontosphaera syracusana Pontosphaera alta Pontosphaera panarium Pontosphaera versa Pontosphaera wallacei Pontosphaera latoculata Pontosphaera sp.A Pontosphaera formosa Pontosphaera wechesensis Pontosphaera fimbriata Pontosphaera brinkhuisii Pontosphaera hollisii Pontosphaera romansii Pontosphaera japonica Pontosphaera plana Pontosphaera rimosa Pontosphaera pectinata Pontosphaera wilsonii Pontosphaera punctosa Pontosphaera clinosulcata Pontosphaera perforomarginata Pontosphaera pulcheroides Pontosphaera pulchra Pontosphaera pygmaea Pontosphaera ocellata Pontosphaera duocava Pontosphaera exilis Pontosphaera pax Pontosphaera obliquipons Transversopontis omarians Pontosphaera sp.
	Scyphosphaera Coccospheres with Pontosphaera-like body coccoliths and equatorial coccoliths with rims elevated into vase-like structures (lopadoliths).	Scyphosphaera apsteinii Scyphosphaera porosa Scyphosphaera brevis Scyphosphaera globulata Scyphosphaera hamptonii Scyphosphaera hemirana Scyphosphaera lagena Scyphosphaera campanula Scyphosphaera intermedia Scyphosphaera pulcherrima Scyphosphaera tubifera Scyphosphaera ventriosa Scyphosphaera columella Scyphosphaera expansa Scyphosphaera interstincta Scyphosphaera olla Scyphosphaera tercisensis Scyphosphaera tubicena Scyphosphaera sp.

Taxonomy:

Citation: Pontosphaeraceae Lemmermann, 1908

Rank: Family

Distinguishing features:
Parent taxon (Zygodiscales): 2N: Heterococcoliths with V-units forming upper/outer cycle of imbricated elements and R-units forming basal plate and central mass of irregular elements. Usually motile
N: Form holococcoliths formed of single block
This taxon: Monomorphic or dimorphic; liths muroliths with perforate central area

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

Morphology:

Coccospheres sub-spherical, without flagellar opening (although flagellae have occasionally been observed). Monomorphic (Pontosphaera) or dimorphic with strongly-modified equatorial coccoliths (Scyphosphaera). Coccoliths are muroliths, central area with variable number of perforations. V-units form narrow outer rim-cycle with anti-clockwise imbrication. R-units form inner rim, with weak clockwise imbrication, baseplate and blanket.

Biology & life-cycles

Two extant species are known to have holococcolith -bearing life cycle phases, Frada et al. (2009)

Search data:

Lith size: 5->25µm;

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 Selandian Stage (4% up, 61.5Ma, in Selandian 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: Zygodiscales

References:

Frada, M., Percopo, I., Young, J. R., Zingone, A., de Vargas, C. & Probert, I. (2009). First observations of heterococcolithophore-holococcolithophore life cycle combinations in the family Pontosphaeraceae (Calcihaptophycideae, Haptophyta). Marine Micropaleontology. 71(1): 20-27. gs

Lemmermann, E. (1908). Flagellatae, Chlorophyceae, Coccosphaerales und Silicoflagellatae. In, Brandt, K. & Apstein, C. (eds) Nordisches Plankton. Botanischer Teil. Lipsius & Tischer, Kiel & Leipzig 1-40. gs

Pontosphaeraceae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 1-4-2023

Taxon Search:

Advanced Search

AphiaID: 115067 Nomenclatural data on WoRMS
Short stables page link: https://mikrotax.org/Nannotax3/index.php?id=1105 Go to Archive.is to create a permanent copy of this page - citation notes

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