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:
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.
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 |
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:
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. (1984). Two new genera of calcareous nannofossils from the Lower Jurassic. Journal of Paleontology. 58(4): 1151-1155. gsReferences:
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Orthogonoides compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 30-9-2023
Short stables 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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