Rucinolithus


Classification: Mesozoic -> Nannoliths inc sedis -> Nannoliths inc sed - radiate multielement -> Rucinolithus
Sister taxa: Acadialithus, Assipetra, Hayesites, Phosterolithus, Rucinolithus, Sikoraea,

Distinguishing features: Stellate nannoliths formed from 5 or more imbricating elements; small additional cycles may be present.Some at least may be calices from the top of spines of heterococcoliths.


Daughter taxa: (blue => in age window 0-800Ma)
6 rays
6 short, symmetric rays.
6, long, tapering rays - and nannolith large
6 long slender rays with dextral imbrication in distal view
6 imbricate, asymmetric rays
>6 rays
8 rays
9-12 parallel sided, well-separated rays
9 imbricate rays
Specimens not identified to species level

Taxonomy:

Citation: Rucinolithus Stover, 1966
Rank: Genus
Type species: Rucinolithus hayi Stover, 1966

Farinacci & Howe catalog pages: Rucinolithus *

Distinguishing features: Stellate nannoliths formed from 5 or more imbricating elements; small additional cycles may be present.Some at least may be calices from the top of spines of heterococcoliths.

See also: Retecapsa angustiforata - calyx was previously described as Rucinolithus radiatus;

Geological Range:
Last occurrence (top): at top of Maastrichtian Stage (100% up, 66Ma, in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Tithonian Stage (0% up, 152.1Ma, in Tithonian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs

Stover, L. E. (1966). Cretaceous coccoliths and associated nannofossils from France and the Netherlands. Micropaleontology. 12: 133-167. gs


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Rucinolithus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 14-11-2019

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=11052 Go to Archive.is to create a permanent copy of this page - citation notes



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