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:
Farinacci & Howe catalog pages:
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->19µm; Segments: 16->16; Data source notes: size range of included species |
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:
P. cretacea group compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 9-10-2024
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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