Fasciculithaceae


Ancestry: Coccolithophores -> Discoasterales -> Fasciculithaceae
Sister taxa: Discoasteraceae, Fasciculithaceae, Heliolithaceae, Sphenolithaceae,

Short diagnosis: Conical or cylindrical discoasteralids consisting of 10-30 wedge-shaped, radially-arranged elements, in one to three superposed cycles.


Daughter taxa (blue => in age window 0-300Ma) Granddaughter taxa
Squat fasciculiths divided into sub-equal upper and lower cycles with different optical orientations. Conical openings on both sides, no fenestrae

Conical or cylindrical fasciculiths formed of a single cycle of elements, outer surface is usually covered by fenestrae.

Fasciculiths formed of a single cycle, argubly with central body, deep cavity on one side, no fenestrae

Complex fasciculiths - formed of two or three discrete cycles; no fenestrae

Taxonomy:

Citation: Fasciculithaceae Hay & Mohler, 1967
Rank: Family
Notes & discussion: The species traditionally included in Fasciculithus have recently been subdivided into three genera - Fasciculithus, Gomphiolithus and Lithoptychius - and an additional genus, Diantholitha, described (Aubry et al. 2011). This scheme is further described in Aubry et al. (2012) and Monechi et al. (2012). Finally Monechi et al. (2013) provides data on their stratigraphic ranges.
The term "fasciculith" is used here for nannoliths from any of the genera.

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

Short diagnosis: Conical or cylindrical discoasteralids consisting of 10-30 wedge-shaped, radially-arranged elements, in one to three superposed cycles.


Morphology remarks: Typically have a concave end that is assumed to be proximal and a convex or pointed end that is considered distal. Outer surface is often covered by depressions (fenestrae). Typically seen in diagnostic side view.
Key references - Romein 1979; Perch-Nielsen 1985; Aubry et al. 2011; Aubry et al. 2012; Monechi et al. 2012; Monechi et al. 2013

Size: Fasciculiths are predominantly moderate size nannliths within the size range 5-9µm and size does not vary much betwen species. The prime exception is F. tonii which is much biger, 10-20 µm.

Search data:
TagsLITHS: nannolith-radiate, conical, cylindrical, circular,
CSPH: not known,
MetricsLith size: 0->0┬Ám;
Sources:
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Ypresian Stage (47.84-55.96Ma, top in Ypresian stage). Data source: Total of range of species in this database
First occurrence (base): within Danian Stage (61.61-66.04Ma, base in Danian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Aubry, M.P.; Bord, D. & Rodriguez, O., (2011). New taxa of the Order Discoasterales Hay 1977. Micropaleontology, 57(3): 269-287.

Aubry, M.-P.; Rodriguez, O.; Bord, D.; Godfrey, L.; Schmitz, B. & Knox, R.W.O.B., (2012). The first radation of the Fasciculiths: Morphologic adaptations of the coccolithophores to oligotrophy. Australian Journal of Earth Sciences, 105(1): 29-38.

Hay, W.W. & Mohler, H.P., (1967). Calcareous nannoplankton from Early Tertiary rocks at Point Labau, France and Paleocene-Early Eocene correlations. Journal of Paleontology, 41(6): 1505-1541.

Monechi, S.; Reale, V.; Bernaola, G. & Balestra, B., (2012). Taxonomic review of early Paleocene fasciculiths. Micropaleontology, 58(4): 351-365.

Monechi, S.; Reale, V.; Bernaola, G. & Balestra, B., (2013). The Danian/Selandian boundary at Site 1262 (South Atlantic) and in the Tethyan region: Biomagnetostratigraphy, evolutionary trends in fasciculiths and environmental effects of the Latest Danian Event. Marine Micropaleontology, 98(1): 28-40.

Perch-Nielsen, K., (1985). Cenozoic calcareous nannofossils. In: Bolli, H.M., Saunders, J.B. and Perch-Nielsen, K. (Editors), Plankton Stratigraphy. Cambridge University Press, Cambridge, pp. 427-555.

Romein, A.J.T., (1979). Lineages in Early Paleogene calcareous nannoplankton. Utrecht Micropaleontological Bulletins, 22: 231.


nannotaxlogo400px

Fasciculithaceae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 26-9-2017

Taxon Search:
Advanced Search
AphiaID: not found
Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet. Be the first!

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics