Orthogonoides


Ancestry: Mesozoic -> Nannoliths inc sedis -> Nannoliths inc sed - other -> Orthogonoides
Sister taxa: Ceratolithina, Ceratolithoides, Liliasterites, Marthasterites, Orthogonoides, Singanoa, Tripinnalithus, Watkinsia,

Short diagnosis: Nannolith with six orthogonal rays.


Daughter taxa (blue => in age window 0-300Ma)
Nannolith with six orthogonal rays.
Specimens not identified to species level

Taxonomy:

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

Farinacci & Howe catalog pages: Orthogonoides *

Short diagnosis: Nannolith with six orthogonal rays.

Geological Range:
Last occurrence (top): within Toarcian Stage (174.15-182.70Ma, top in Toarcian stage). Data source: Total of range of species in this database
First occurrence (base): within Sinemurian Stage (190.82-199.30Ma, base 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. (Editor), Calcareous nannofossil biostratigraphy. British Micropalaeontological Society Publication Series. Chapman & Hall, pp. 34-85.

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


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Orthogonoides compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 19-10-2017

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