Nannotax3 - ntax_mesozoic - Orthogonoides

Orthogonoides


Classification: ntax_mesozoic -> Nannoliths inc sedis -> Nannoliths inc sed - other -> Orthogonoides
Sister taxa: Ceratolithina, Ceratolithoides, Liliasterites, Marthasterites, Orthogonoides, Rhomboaster, Tripinnalithus, Watkinsia

Distinguishing features:
Parent taxon (Nannoliths inc sed - other): Nannolith genera without clear affinities to any other genera
This taxon: Nannolith with six orthogonal rays.


Daughter taxa (time control age-window is: 0-800Ma)
Orthogonoides hamiltoniae
Nannolith with six orthogonal rays.
Orthogonoides sp.
Specimens not identified to species level

Taxonomy:

Citation: Orthogonoides Wiegand, 1984
Rank: Genus
Type species: Orthogonoides hamiltoniae Wiegand, 1984.

Farinacci & Howe catalog pages: Orthogonoides *

Distinguishing features:
Parent taxon (Nannoliths inc sed - other): Nannolith genera without clear affinities to any other genera
This taxon: Nannolith with six orthogonal rays.


Morphology:


Size:


Ecology & Biogeography


Biology & life-cycles

Phylogenetic relations

Search data:
LITHS: nannolith-radiate, quadrate, star-shaped, CROSS-POLARS: 1ou, R-prominent,
Lith size: 8->16µm; Segments: 6->6;
Data source notes: original description & illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): in lower part of Toarcian Stage (26% up, 180.5Ma, in Toarcian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Sinemurian Stage (68% up, 193.5Ma, in Sinemurian stage). Data source: Total of range of species in this database

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 O

Wiegand, G. E. (1984c). Two new genera of calcareous nannofossils from the Lower Jurassic. Journal of Paleontology. 58(4): 1151-1155. gs


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Orthogonoides compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 4-12-2022

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10829 Go to Archive.is to create a permanent copy of this page - citation notes



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