Nannoliths inc sed - radiate multielement
Classification: ntax_mesozoic -> Nannoliths inc sedis -> Nannoliths inc sed - radiate multielement
Sister taxa: Goniolithaceae, Eoconusphaeraceae, Lapideacassaceae, Microrhabdulaceae, Nannoliths inc sed - radiate multielement, Nannoliths inc sed - other
Distinguishing features: Radiate nanoliths formed of multiple elements but lacking a central diaphragm
Daughter taxa (time control age-window is: 0-800Ma) | Granddaughter taxa |
 |  |  |  | Acadialithus
Squat tube-shaped nannoliths; wall formed of two vertically stacked cycles, with 6-7 elements per cycle; wide central opening; c-axes oblique
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 |  |  |  | Assipetra
Blocky to globular nannoliths typically formed from intergrown elements that may show radial symmetry.
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 |  |  |  | Hayesites
Stellate nannoliths with 6-11 imbricate rays. Small subsidiary cycles and spines may be present.
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 | | | | Phosterolithus
Rosette-shaped radiate nannoliths with alternating elements having radial and tangential crystallographic orientations
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 |  |  |  | Rucinolithus
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.
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 |  |  |  | Sikoraea
Birefringent and fusiform nannolith having a smooth surface with longitudinal slits which are confined to its apex, leaving an un-pierced section in the middle.
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Taxonomy:
Citation: Incertae sedis nannoliths formed of multiple, radiate elements Rank: informal group of generaTaxonomic discussion: this is an informal grouping
Farinacci & Howe catalog pages: Nannoliths inc sed - radiate multielement [no catalog entry yet]
Distinguishing features: Radiate nanoliths formed of multiple elements but lacking a central diaphragm
Morphology: This is a mixed group of taxa, they resemble Polycoliths in being multiradiate and formed of multiple elements but lack the median diaphragm
Search data:
| Tags | LITHS: |
| Metrics | Lith size: 0->0µm; |
The morphological data given here can be used on the advanced search page. See also these notes
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:
- Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
- Triangles indicate an event for which a precise placement has been suggested
- Neptune data: this is a higher taxon page so Neptune data is not plotted. For the customisable plot option go to a genus page Parent: Nannoliths inc sedis
References:
