Nannotax3 - ntax_mesozoic - Calyculus serrai

Calyculus serrai


Classification: ntax_mesozoic -> Podorhabdales -> Calyculaceae -> Calyculus -> Calyculus serrai
Sister taxa: C. cribrum, C. depressus ⟩⟨ C. noeliae ⟩⟨ C. hommerili, C. serrai ⟩⟨ C. absolutus, C. derivatus, C. magnus, C. sp.

Distinguishing features:
Parent taxon (Calyculus): 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.
This taxon: Elliptical Calyculus; rim moderately elevated; central area with axial cross, small lozenge and long radial bars.


Taxonomy:

Citation: Calyculus serrai (Goy, 1981) Crux, 1987
Rank: Species
Basionym: Catillus serrai Goy, 1981

Farinacci & Howe catalog pages: C. serrai *

Distinguishing features:
Parent taxon (Calyculus): 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.
This taxon: Elliptical Calyculus; rim moderately elevated; central area with axial cross, small lozenge and long radial bars.

Search data:
TagsLITHS: placolith, elliptical, hollow, CA: cross-axial, ca_disjunct, grill, CROSS-POLARS: rim-unicyclic, V-prominent,
MetricsLith size: 4->5µm;
Data source notes: original description
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Early Toarcian Substage (178.24-182.70Ma, top in Toarcian stage). Data source: Bown 1987 (original description)
First occurrence (base): within Early Toarcian Substage (178.24-182.70Ma, base in Toarcian stage). Data source: Bown 1987 (original description)

Plot of occurrence data:

References:

Bown, P. R. & Cooper, M. K. E. (1998). Jurassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 34-85. gs

Crux, J. A. (1987a). Concerning dimorphism in Early Jurassic coccoliths and the origin of the genus Discorhabdus Noël 1965. Abhandlungen der Geologischen Bundesanstalt. 39: 51-55. gs V O

Goy, G. (1981). Nannofossiles calcaires des schistes carbon (Toarcien Inferieur) du Bassin de Paris. Doc. de la RCP 459, Nature et genese des facies confines, (Editions du BRGM). 1: 1-86. gs


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Calyculus serrai compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-11-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10194 Go to Archive.is to create a permanent copy of this page - citation notes



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