Nannotax3 - ntax_mesozoic - Mazaganellaceae

Mazaganellaceae

Classification: ntax_mesozoic -> Podorhabdales -> Mazaganellaceae
Sister taxa: Axopodorhabdaceae, Biscutaceae, Calyculaceae, Cretarhabdaceae, Mazaganellaceae, Prediscosphaeraceae, Tubodiscaceae

Distinguishing features:
Parent taxon (Podorhabdales): Placolith (or modified placolith) coccoliths showing little or no imbrication. Typically, V-units form distal shield, R-units form proximal shield.
This taxon: Three-shielded placoliths; central-area wide, spanned by bars, grill, net or plate.
The distal shield may be high and flaring, formed from non-imbricating elements, joined along radial sutures. LM image is generally dark, but birefringence increases when the distal shield is high.

Daughter taxa (time control age-window is: 0-800Ma)		Granddaughter taxa
	Mazaganella Three-shielded placoliths with a wide central-area spanned by a variety of bars, grills, nets or plates. The distal shield may be high and flaring. The distal shield is formed from non-imbricating elements, joined along radial sutures. LM image is generally dark, but birefringence increases when the distal shield is high.	M. protensa M. pulla M. sp.
	Triscutum Three-shielded placoliths with a wide central-area spanned by a proximal net or grill.	T. beaminsterensis T. expansus T. pricatillus T. sullivanii T. tiziense T. sp.

Taxonomy:

Citation: Mazaganellaceae Bown, 1987

Rank: Family

Type species: Mazaganella Bown, 1987

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

Morphology:

Three-shielded placoliths with a wide central-area spanned by a variety of bars, grills, nets or plates. The distal shield may be high and flaring. The distal shield is formed from non-imbricating elements, joined along radial sutures. LM image is generally dark, but birefringence increases when the distal shield is high.

Size:

Search data:

Tags	LITHS: placolith, ca_disjunct,
Metrics	Lith size: 0->0µm;

The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): in upper part of Oxfordian Stage (61% up, 159.7Ma, in Oxfordian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Sinemurian Stage (0% up, 199.3Ma, in Hettangian 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: Podorhabdales

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

Bown, P. R. (1987a). Taxonomy, evolution, and biostratigraphy of Late Triassic-Early Jurassic calcareous nannofossils. Special Papers in Palaeontology. 38: 1-118. gs

Mazaganellaceae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-5-2022

Taxon Search:

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10648 Go to Archive.is to create a permanent copy of this page - citation notes

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