Nannotax3 - ntax_mesozoic - Senilatus Nannotax3 - ntax_mesozoic - Senilatus

Senilatus


Classification: ntax_mesozoic -> Arkhangelskiales -> Kamptneriaceae -> Senilatus
Sister taxa: Crucicribrum, Gartnerago, Kamptnerius, Senilatus

Distinguishing features:
Parent taxon (Kamptneriaceae): Arkhangelskielids with shields predominantly formed of V-units, thus dark in cross-polarised light; R-units form bright band at core of shield.
This taxon: Simlar to Gartnerago but rim with only 3 tiers and outline elongate-hexagonal rather than elliptical


Daughter taxa (time control age-window is: 0-800Ma)
Senilatus zipperum
Numerous small pores in central plate, in LM the rim goes into extinction in 6 bloakcs corresponding to the sides of the hexagonal coccolith

Taxonomy:

Citation: Senilatus Self-Trail 1999
taxonomic rank: Genus
Type species: Senilatus zipperum (Bukry 1969) Self-Trail (1999)

Farinacci & Howe catalog pages: Senilatus *

Distinguishing features:
Parent taxon (Kamptneriaceae): Arkhangelskielids with shields predominantly formed of V-units, thus dark in cross-polarised light; R-units form bright band at core of shield.
This taxon: Simlar to Gartnerago but rim with only 3 tiers and outline elongate-hexagonal rather than elliptical

Search data:
LITHS: placolith, elliptical, polygonal, CA: ca_conjunct, plate, pores, closed, CROSS-POLARS: V-prominent,
Lith size: 8->10┬Ám;
Data source notes: size range of included species
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 CC21 zone (100% up, 76.8Ma, in Campanian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within CC18 zone (80.97-81.43Ma, base in Campanian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

References:

Self-Trail, J. (1999). Some new and rarely documented Late Cretaceous calcareous nannofossils from subsurface sediments in South Carolina. Journal of Paleontology. 73(5): 952-963. gs


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Senilatus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-2-2024

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=11078 Go to Archive.is to create a permanent copy of this page - citation notes
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