Taxonomy:
Distinguishing features:
Parent taxon (Staurolithites): Loxolith muroliths with relatively narrow rim and wide central area spanned by axial cross bars. The cross is usually spine bearing. Inner/proximal rim cycle is variably developed and so the LM image may be unicyclic or bicyclic. NB The bicyclic/unicyclic separation is simply controlled by how far the inwards the R-units develop so, although it is a useful identification criterion, it almost certainly has no real phylogenetic significance and would be a very poor character for defining genera.
This taxon: long elliptical with broad crossbars
Farinacci & Howe catalog pages: V. imbricata elongata *
Search data:
LITHS: murolith, elliptical, CA: cross-axial, ca_disjunct, process, CROSS-POLARS: rim-bicyclic, V-prominent, |
Lith size: 4->6µm; Data source notes: illustrated specimens |
Geological Range:
Last occurrence (top): within Late Maastrichtian Substage (66.04-70.10Ma, top in Maastrichtian stage). Data source: Burnett 1998
First occurrence (base): within Santonian Stage (83.65-85.70Ma, base in Santonian stage). Data source: Burnett 1998
Plot of occurrence data:
al Rawahi, Z. & Dunkley Jones, T. (2019). Calcareous nannofossil assemblages of the Late Cretaceous Fiqa Formation, north Oman. Journal of Micropalaeontology. 38(1): 25-54. gs O Bukry, D. (1969). Upper Cretaceous coccoliths from Texas and Europe. University of Kansas Paleontological Contributions, Articles. 51 (Protista 2): 1-79. gs O Burnett, J. A. (1997c). New species and new combinations of Cretaceous nannofossils and a note on the origin of Petrarhabdus (Deflandre) Wise & Wind. Journal of Nannoplankton Research. 19(2): 133-146. gs Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 132-199. gs O Thibault, N. (2010). Calcareous nannofossils from the boreal Upper Campanian- Maastrichtian chalk of Denmark. Journal of Nannoplankton Research. 31(1): 39-56. gs References:
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Staurolithites elongatus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 21-6-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=11121 Go to Archive.is to create a permanent copy of this page - citation notes |
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