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
Lithoptychius janii
Cylindrical column with narrow waist and a wide, disc-like apical cycle that is crystallographically distinct.
Lithoptychius pileatus
Cylindrical column that broadens distally and a wide, disc-like apical cycle that is crystallographically distinct.
Lithoptychius ulii
Cylindrical column with a narrower, domed apical cycle that is crystallographically distinct.
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.
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.
Lithoptychius sp.

Taxonomy:

Citation: Lithoptychius Aubry in Aubry et al. 2011
Rank: Genus
Type 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:
TagsLITHS: nannolith-radiate, circular, cylindrical, CROSS-POLARS: V-prominent, R-prominent,
MetricsLith 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:

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


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Lithoptychius compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 8-3-2021

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=812 Go to Archive.is to create a permanent copy of this page - citation notes



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