Nannotax3 - ntax_main - Tangential wall Nannotax3 - ntax_main - Tangential wall

Tangential wall


Classification: ntax_main -> other groups -> Dinophytes -> Thoracosphaeraceae -> Tangential wall
Sister taxa: Tangential wall, Radial wall, Oblique wall, Possible Thoracosphaeraceae, Pithonellid, Calcispheres inc sedis, u. calcispheres

Daughter taxa (time control age-window is: 0-800Ma)Granddaughter taxa
Calcigonellum

Calcigonellum ansatum
Calcigonellum granulatum
Calcigonellum infula
Calcigonellum minutum

Calciodinellum
Cysts with combination archaeopyle - formed from multiple plates and so with indented angular margin.
Calciodinellum albatrosianum
Calciodinellum levantinum
Calciodinellum clamosum
Calciodinellum elongatum
Calciodinellum kerguelense
Calciodinellum limbatum
Calciodinellum operosum
Calciodinellum sp.

Centosphaera

Centosphaera barbata

Cervisiella
Spherical, with circular archaeopyle, no paratabulation. Wall structure irregular with tangential c-axes.
Cervisiella operculata
Cervisiella saxea
Cervisiella sp.

Fuettererella
Wall structure with radial fabric but tangential c-axes ("pseudoorthopithonellid")
Fuettererella belliata
Fuettererella conforma
Fuettererella deflandrei
Fuettererella elliptica
Fuettererella flora
Fuettererella fungiforma
Fuettererella sp.
Fuettererella tesserula

Lebessphaera
Cysts with tangential wall-structure and epicystal archaeopyles
Lebessphaera sp.
Lebessphaera urania

Operculodinella
Like Cervisiella but with paratabulation
Operculodinella costata
Operculodinella hydria
Operculodinella reticulata

Scrippsiella
Cysts with tangential wall structure and compound archaeopyles. Wall formed of largish non-intelocking elements each with a spine

Thoracosphaera

Thoracosphaera wombatensis
Thoracosphaera heimii
Thoracosphaera eichstaettensis
Thoracosphaera prolata
Thoracosphaera sp.


Taxonomy:
Citation: Tangential wall
Taxonomic rank: informal group of genera
Taxonomic discussion: Generic classification within this group is now primarily based on the archaeopyle type - i.e. the number of plates interpreted to have formed the archaeopyle, largely following Streng et al. (2004). Nannofosil workers havetraditionally inlcuded most of these in Thoracosphaera

Synonyms:

Distinguishing features:
Parent taxon (Thoracosphaeraceae): Calcareous dinoflagellates
This taxon: Wall formed of crystals with tangential c-axes (Thoracosphara s.l.)

Search data:
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): Extant. Data source: Total of ranges of the species in this database
First occurrence (base): within Late Triassic Epoch (201.36-237.00Ma, base in Carnian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

References:


nannotaxlogo400px

Tangential wall compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 21-7-2026

Taxon Search:
Advanced Search

Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=20461 Go to Archive.is to create a permanent copy of this page - citation notes



Add Comment

* Required information
Captcha Image

Comments

No comments yet. Be the first!