Nannotax3 - ntax_mesozoic - Calyculus magnus

Calyculus magnus


Classification: ntax_mesozoic -> Podorhabdales -> Calyculaceae -> Calyculus -> Calyculus magnus
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: Large (ca 6-8 µm across), broadly elliptical Calyculus; rim elevated, broad; central area with grill


Taxonomy:

Citation: Calyculus magnus (Goy, 1981) Crux, 1984
Rank: Species
Basionym: Incerniculum magnum Goy, 1981

Farinacci & Howe catalog pages: I. magnum *

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: Large (ca 6-8 µm across), broadly elliptical Calyculus; rim elevated, broad; central area with grill

Search data:
TagsLITHS: placolith, elliptical, hollow, CA: ca_disjunct, grill, CROSS-POLARS: rim-unicyclic, V-prominent,
MetricsLith size: 6->8µm;
Data source notes: holotype +/- 1µm
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:

Crux, J. A. (1984). Biostratigraphy of Early Jurassic calcareous nannofossils from southwest Germany. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 169: 160-186. gs

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 magnus 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=10189 Go to Archive.is to create a permanent copy of this page - citation notes



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