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Nannotax3 - ntax_mesozoic - Prediscosphaera desiderograndis Nannotax3 - ntax_mesozoic - Prediscosphaera desiderograndis

Prediscosphaera desiderograndis


Classification: ntax_mesozoic -> Podorhabdales -> Prediscosphaeraceae -> Prediscosphaera -> P. cretacea group -> Prediscosphaera desiderograndis
Sister taxa: P. cretacea, P. desiderograndis, P. grandis, P. majungae, P. microrhabdulina, P. serrata

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:

Citation: Prediscosphaera desiderograndis Blair & Watkins 2009
Taxonomic rank: species
Synonyms:

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:

Similar to P. grandis, but not as big (9-11 µm vs 10-19 µm), regarded by Blair & Watkins as an intermediate form between P. cretacea and P. grandis

Size:
9-11 µm

Search data:
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
The morphological data given here can be used on the advanced search page. See also these notes

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:

References:

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 O


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Prediscosphaera desiderograndis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-3-2025

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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
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