Nannotax3 - non_cocco - Tangential wall

Tangential wall

Ancestry: non_cocco -> Dinophytes -> Calcareous dinoflagellates -> Tangential wall
Sister taxa: Tangential wall, Radial wall, Oblique wall, Pithonellid, Possible Thoracosphaeraceae, Calcispheres inc sedis, unidentified calcispheres,

Short diagnosis: Wall formed of crystals with tangential c-axes (Thoracosphara s.l.)

Daughter taxa (blue => in age window 0-300Ma)		Granddaughter taxa
	Calcigonellum	C. ansatum C. granulatum C. infula C. minutum
	Calciodinellum Cysts with combination archaeopyle - formed from multiple plates and so with indented angular margin.	C. albatrosianum C. levantinum C. clamosum C. elongatum C. kerguelense C. limbatum C. operosum C. sp.
	Centosphaera	C. barbata
	Cervisiella Spherical, with circular archaeopyle, no paratabulation. Wall structure irregular with tangential c-axes.	C. operculata C. saxea C. sp.
	Fuettererella Wall structure with radial fabric but tangential c-axes ("pseudoorthopithonellid")	F. belliata F. conforma F. deflandrei F. elliptica F. flora F. fungiforma F. tesserula F. sp.
	Lebessphaera Cysts with tangential wall-structure and epicystal archaeopyles	L. urania L. sp.
	Operculodinella Like Cervisiella but with paratabulation	O. costata O. hydria O. reticulata
	Scrippsiella Cysts with tangential wall structure and compound archaeopyles. Wall formed of largish non-intelocking elements each with a spine	S. crystallina S. lachrymosa S. minima S. patagonica S. precaria S. rotunda S. sweeneyae S. trifida S. triquetracapitata S. acuminata S. regalis S. fragments S. sp.
	Thoracosphaera	T. wombatensis T. heimii T. eichstaettensis T. prolata T. sp.

Taxonomy:

Synonyms:

Notes & 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

Short diagnosis: Wall formed of crystals with tangential c-axes (Thoracosphara s.l.)

Geological Range:
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): within Carnian Stage (228.35-237.00Ma, base in Carnian stage). Data source: Total of range of species in this database

Tangential wall compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-9-2017

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