arrayname: original
Distinguishing features:
Parent taxon (P. cretacea group): Elliptical Prediscophaera species with a diagonal cross
This taxon: Similar to P. grandis, but not as big (9-11 µm vs 10-19 µm)
Taxonomy:
Farinacci & Howe catalog pages: P. desiderograndis *
Distinguishing features:
Parent taxon (P. cretacea group): Elliptical Prediscophaera species with a diagonal cross
This taxon: Similar to P. grandis, but not as big (9-11 µm vs 10-19 µm)
Morphology:
Size:
LITHS: placolith, elliptical, CA: diagonal cross, process, ca_disjunct, CROSS-POLARS: R-prominent, V-prominent, rim-bicyclic, |
Lith size: 9->11µm; Segments: 16->16; Data source notes: original description & illustrated specimens |
Geological Range:
Last occurrence (top): within Santonian Stage (83.65-85.70Ma, top in Santonian stage). Data source: Blair & Watkins 2009
First occurrence (base): within Coniacian Stage (85.70-89.39Ma, base in Coniacian stage). Data source: Blair & Watkins 2009
Plot of occurrence data:
Blair, S. A. & Watkins, D. K. (2009). High-resolution calcareous nannofossil biostratigraphy for the Coniacian/Santonian Stage boundary, Western Interior Basin. Cretaceous Research. 30(2): 367-384. gs Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 132-199. gs OReferences:
![]() |
Prediscosphaera desiderograndis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-3-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=11351 Go to Archive.is to create a permanent copy of this page - citation notes |
![]() |
This policy contains information about your privacy. By posting, you are declaring that you understand this policy:
This policy is subject to change at any time and without notice.
These terms and conditions contain rules about posting comments. By submitting a comment, you are declaring that you agree with these rules:
Failure to comply with these rules may result in being banned from submitting further comments.
These terms and conditions are subject to change at any time and without notice.
Comments