Lithoptychius
Classification: ntax_cenozoic -> Discoasterales -> Fasciculithaceae -> Lithoptychius
Sister taxa: Diantholitha, Fasciculithus, Gomphiolithus, Lithoptychius
Daughter taxa (time control age-window is: 0-800Ma) |
 |  |  |  | Lithoptychius billii
Shaped like a cotton reel bobbin, i.e. cylindrical but broadening at each end. Topmost part formed of discrete cycles
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 |  |  |  | Lithoptychius janii
Cylindrical column with narrow waist and a wide, disc-like apical cycle that is crystallographically distinct.
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 |  |  |  | Lithoptychius pileatus
Cylindrical column that broadens distally and a wide, disc-like apical cycle that is crystallographically distinct.
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 |  |  |  | Lithoptychius ulii
Cylindrical column with a narrower, domed apical cycle that is crystallographically distinct.
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 |  |  |  | Lithoptychius varolii
Fasciculiths consisting of three distinct structures, including a proximal column, a middle cycle of lateral elements and a distal superimposed mushroom-shaped cone.
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 |  |  |  | Lithoptychius vertebratoides
Egg-timer-shaped fasciculith of variable size (ca 6 to 8 µm), consisting of a high proximal column and a low and small distal cone forming a cylindrical ring of elements.
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 |  | | | Lithoptychius sp.
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Taxonomy:
Citation: Lithoptychius Aubry in Aubry et al. 2011Rank: GenusType species: Fasciculithus ulii Perch-Nielsen 1971
Distinguishing features: Complex fasciculiths - formed of two or three discrete cycles; no fenestrae
Farinacci & Howe catalog pages: Lithoptychius *
Morphology: In ell-preserved specimens the column appears fluted, i.e. the contacts between elements are recessed. The recesses are not, however, subdivided horizontally into fenestrae.
Search data:
| Tags | LITHS: nannolith-radiate, circular, cylindrical, CROSS-POLARS: V-prominent, R-prominent, |
| Metrics | Lith size: 4->10µm; |
The morphological data given here can be used on the advanced search page. See also these notes
Geological Range:
Last occurrence (top): near base of Thanetian Stage (12% up, 58.8Ma, in Thanetian stage). Data source: Total of range of species in this database
First occurrence (base): near top of Danian Stage (87% up, 62.2Ma, in Danian 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. See also: customisable plot Parent: Fasciculithaceae
References:
Aubry, M. P., Bord, D. & Rodriguez, O. (2011). New taxa of the Order Discoasterales Hay 1977. Micropaleontology. 57(3): 269-287. gs
Monechi, S., Reale, V., Bernaola, G. & Balestra, B. (2013). The Danian/Selandian boundary at Site 1262 (South Atlantic) and in the Tethyan region: Biomagnetostratigraphy, evolutionary trends in fasciculiths and environmental effects of the Latest Danian Event. Marine Micropaleontology. 98(1): 28-40. gs
