Distinguishing features:
Parent taxon (Amphizygus): Muroliths with bicyclic rim and tranverse bar formed from laths which continue around the inner edge of the rim, delineating the two circular perforations.
This taxon: Small Amphizygus.
Taxonomy:
Farinacci & Howe catalog pages: A. minimus *
Distinguishing features:
Parent taxon (Amphizygus): Muroliths with bicyclic rim and tranverse bar formed from laths which continue around the inner edge of the rim, delineating the two circular perforations.
This taxon: Small Amphizygus.
Search data:
LITHS: murolith, elliptical, CA: ca_disjunct, bar, CROSS-POLARS: rim-bicyclic, V-prominent, |
Lith size: 4->6µm; Data source notes: original description & illustrated specimens |
Geological Range:
Last occurrence (top): within UC15d subzone (75.85-76.77Ma, top in Campanian stage). Data source: Burnett 1998
First occurrence (base): in mid part of UC11c subzone (50% up, 85.6Ma, in Santonian stage). Data source: Burnett 1998, fig 6.4
Plot of occurrence data:
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. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 132-199. gs O Crux, J. A. (1980). A biostratigraphical study of Upper Cretaceous nannofossils from South-east England and North France. PhD thesis, University College London. -. gs Reinhardt, P. (1971). Synopsis der Gattungen und Arten der mesozoischen Coccolithen und anderer kalkiger Nannofossilien. Teil III. Freiberger Forschungshefte. C267: 19-41. gsReferences:
Amphizygus minimus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-10-2024
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10015 Go to Archive.is to create a permanent copy of this page - citation notes |
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