Gephyrobiscutum


Classification: Mesozoic -> Podorhabdales -> Biscutaceae -> Gephyrobiscutum
Sister taxa: Biscutum, Boletuvelum, Chiastella, Crucibiscutum, Discorhabdus, Gaarderella, Gephyrobiscutum, Helicorhabdus, Jimenezberrocosoia, Seribiscutum, Similiscutum, Sollasites,

Short diagnosis: Elliptical with bicyclic rim and narrow central-area spanned by oblique transverse bar.


Daughter taxa (blue => in age window 0-300Ma)
Biscutacean placolith with bicyclic rim and narrow central-area spanned by an oblique transverse bar.
Specimens not identified to species level

Taxonomy:

Citation: Gephyrobiscutum Wise, 1988
Rank: Genus
Type species: Gephyrobiscutum diabolum Wise, 1988

Farinacci & Howe catalog pages: Gephyrobiscutum *

Short diagnosis: Elliptical with bicyclic rim and narrow central-area spanned by oblique transverse bar.


Morphology remarks: Austral biogeographic distribution, but rarely reported.

Geological Range:
Last occurrence (top): within Campanian Stage (72.05-83.64Ma, top in Campanian stage). Data source: Total of range of species in this database
First occurrence (base): within Campanian Stage (72.05-83.64Ma, base in Campanian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Burnett, J.A., (1998). Upper Cretaceous. In: Bown, P.R. (Editor), Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publications Series. Chapman & Hall, London, pp. 132-199.

Wise, S.W., (1988). Mesozoic-Cenozoic history of calcareous nannofossils in the region of the Southern Ocean. Palaeogeography Palaeoclimatology Palaeoecology, 67: 157-179.


nannotaxlogo400px

Gephyrobiscutum compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-1-2018

Taxon Search:
Advanced Search

Go to Archive.is to create a permanent copy of this page - citation notes



Comments (0)

No comments yet. Be the first!

Add Comment

* Required information
1000
Captcha Image
Powered by Commentics