Nannotax3 - ntax_mesozoic - Amphizygus minimus

Amphizygus minimus


Classification: ntax_mesozoic -> Eiffellithales -> Chiastozygaceae -> Amphizygus -> Amphizygus minimus
Sister taxa: A. brooksii, A. microminutus, A. minimus, A. sp.

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:

Citation: Amphizygus minimus Bukry, 1969
Rank: Species
Synonyms:

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:
TagsLITHS: murolith, elliptical, CA: ca_disjunct, bar, CROSS-POLARS: rim-bicyclic, V-prominent,
MetricsLith size: 4->6µm;
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 UC15d subzone (75.93-76.82Ma, top in Campanian stage). Data source: Burnett 1998
First occurrence (base): in mid part of UC11c subzone (50% up, 86Ma, in Santonian stage). Data source: Burnett 1998, fig 6.4

Plot of occurrence data:

References:

Bukry, D. (1969). Upper Cretaceous coccoliths from Texas and Europe. University of Kansas Paleontological Contributions, Articles. 51 (Protista 2): 1-79. gs V O

Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs V 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. gs


nannotaxlogo400px

Amphizygus minimus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 9-12-2021

Taxon Search:
Advanced Search

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



Comments (0)

No comments yet on this page. Please do add comments if you spot any problems, or have information to share

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics