Nannotax3 - ntax_mesozoic - P. cretacea group Nannotax3 - ntax_mesozoic - P. cretacea group

P. cretacea group


Classification: ntax_mesozoic -> Podorhabdales -> Prediscosphaeraceae -> Prediscosphaera -> P. cretacea group
Sister taxa: P. columnata group, P. cretacea group, P. spinosa group, P. sp.

Distinguishing features:
Parent taxon (Prediscosphaera):
This taxon: Elliptical Prediscophaera species with a diagonal cross


Daughter taxa (time control age-window is: 0-800Ma)
Prediscosphaera cretacea
Typical form, elliptical with diagonal cross but lacking other distinguishing features
Prediscosphaera desiderograndis
Similar to P. grandis, but not as big (9-11 µm vs 10-19 µm)
Prediscosphaera grandis
Large to very large (10-19µm); diagonal cross
Prediscosphaera majungae
Base like P. cretacea but spine squat and large; easy to recognise in side view
Prediscosphaera microrhabdulina
Base like P. cretacea but spine very tall and thin; easy to recognise in side view
Prediscosphaera serrata
Outer margin serrated (due to overgrowth?)

Taxonomy:

Citation: Prediscosphaera cretacea group
taxonomic rank: species group

Farinacci & Howe catalog pages: P. cretacea group [no catalog entry yet]

Distinguishing features:
Parent taxon (Prediscosphaera):
This taxon: Elliptical Prediscophaera species with a diagonal cross

Search data:
LITHS: placolith, elliptical, CA: ca_disjunct, process, diagonal cross, CROSS-POLARS: rim-bicyclic, V-prominent,
Lith size: 4->19┬Ám; Segments: 16->16;
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 Maastrichtian Stage (100% up, 66Ma, in Danian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within BC27c subzone (100.07-100.54Ma, base in Albian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

References:


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P. cretacea group compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-12-2023

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10846 Go to Archive.is to create a permanent copy of this page - citation notes
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