Calyculaceae


Ancestry: Mesozoic -> Podorhabdales -> Calyculaceae
Sister taxa: Axopodorhabdaceae, Biscutaceae, Calyculaceae, Cretarhabdaceae, Mazaganellaceae, Prediscosphaeraceae, Tubodiscaceae,

Short diagnosis: Elevated placoliths, tube tall and proximal shield reduced; central-area with variable proximal cover.
The distal shield is formed from V-units and the proximal shield from R-units. Commonly observed in side view.


Daughter taxa (blue => in age window 0-300Ma) Granddaughter taxa
High, broad, flaring distal-shield composed of radial, non-imbricating elements, and a proximal-shield which is often reduced to a simple, narrow cycle of elements; central-area structures are highly variable, including numerous bars, concentric structures, nets and grills.

Trumpet-shaped coccoliths with small, disc-like proximal shield and high, flaring distal shield.

Taxonomy:

Citation: Calyculaceae Noël, 1973
Rank: Family

Farinacci & Howe catalog pages:

Short diagnosis: Elevated placoliths, tube tall and proximal shield reduced; central-area with variable proximal cover.
The distal shield is formed from V-units and the proximal shield from R-units. Commonly observed in side view.

Geological Range:
Last occurrence (top): within Bathonian Stage (166.07-168.28Ma, top in Bathonian stage). Data source: Total of range of species in this database
First occurrence (base): within Pliensbachian Stage (182.70-190.82Ma, base in Pliensbachian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Bown, P.R. & Cooper, M.K.E., (1998). Jurassic. In: Bown, P.R. (Editor), Calcareous nannofossil biostratigraphy. British Micropalaeontological Society Publication Series. Chapman & Hall, pp. 34-85.

Noël, D., (1973). Nannofossiles calcaires de sédiments jurassiques finement laminés. Bulletin du Muséum National d'Histoire Naturelle, 3e serie, 75: 95-156.


Nannotax3 - Mesozoic - Calyculaceae by: Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-6-2017

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