Nannotax3 - ntax_mesozoic - Nannoliths inc sed - other

Nannoliths inc sed - other


Classification: ntax_mesozoic -> Nannoliths inc sedis -> Nannoliths inc sed - other
Sister taxa: Goniolithaceae, Eoconusphaeraceae, Lapideacassaceae, Microrhabdulaceae, Nannoliths inc sed - radiate multielement, Nannoliths inc sed - other

Distinguishing features:
Parent taxon (Nannoliths inc sedis): Nannofossils not obviously homologous with heterococcoliths, holococcoliths, or braarudosphaeralids
This taxon: Nannolith genera without clear affinities to any other genera


Daughter taxa (time control age-window is: 0-800Ma)Granddaughter taxa
Ceratolithina
Monocrystalline, straight or hooked, rod-like nannoliths with lateral spurs and/or blades.
C. bicornuta
C. capitanea
C. copis
C. cruxii
C. duplex
C. hamata
C. naturalisteplateauensis
C. sp.

Ceratolithoides
Conical, arrowhead- or horseshoe-shaped nannoliths. Constructed from two basal rectangular to rhombic elements and a narrow, apical, conical structure.

Liliasterites
Nannoliths with six rays, with alternate rays lying in different planes.
L. angularis
L. atlanticus
L. sp.

Marthasterites
Three-rayed monocrystaline nannoliths; ray tips may have terminal projections. Non-birefringent in plan view.
M. crassus
M. furcatus
M. inconspicuus
M. simplex
M. sp.

Orthogonoides
Nannolith with six orthogonal rays.
O. hamiltoniae
O. sp.

Rhomboaster
Monocrytsalline rhombic nannolith
R. svabenickiae

Tripinnalithus
Elongate to diamond nannoliths with triradiate cross-section, c-axis parallel to nannolith length.
T. shetlandensis
T. sp.

Watkinsia
Large, narrowly elliptical, structureless base from which a broad, flat blade emerges.
W. pedalion
W. sp.

Taxonomy:

Citation: Incertae sedis nannoliths
Rank: informal group of genera

Farinacci & Howe catalog pages: Nannoliths inc sed - other [no catalog entry yet]

Distinguishing features:
Parent taxon (Nannoliths inc sedis): Nannofossils not obviously homologous with heterococcoliths, holococcoliths, or braarudosphaeralids
This taxon: Nannolith genera without clear affinities to any other genera


Morphology: Includes diverse nannoliths that are non-radiate. Apart from Ceratolithoides these are also all formed of a single crysytal unit (and so behave optically as one crystal). 

Search data:
TagsLITHS:
MetricsLith size: 0->0┬Ám;
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 Danian 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:

References:


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Nannoliths inc sed - other compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 24-10-2021

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10787 Go to Archive.is to create a permanent copy of this page - citation notes



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