Hughesius youngii

Classification: ntax_cenozoic -> Coccolithales -> Coccolithaceae -> Hughesius -> Hughesius youngii
Sister taxa: H. gizoensis, H. tasmaniae, H. youngii, H. sp.


Citation: Hughesius youngii da Gama & Varol 2013
Rank: Species

Distinguishing features: Very small species of Hughesius (<4µm), with 2 elongate plates in central-area, separated by transverse suture.

Original description: Diagnosis: Species of Hughesius with two elongated elements in the central area.

Description: This elliptical placolith has elongated two plates in the central area. When the species is aligned 45° to the polarizers, the elements of the shield become birefringent where the long axis of the plates touches the shield. In this respect it artificially resembles Cryptococcolithus biparteoperculata.

Farinacci & Howe catalog pages: H. youngii *

Search data:
TagsLITHS: placolith, elliptical, CA: ca_disjunct, plate, closed,
CSPH: equant, monomorphic, CROSS-POLARS: rim-unicyclic, V-prominent, R-prominent,
MetricsLith size: 2->4µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NN4 zone (14.91-17.95Ma, top in Langhian stage). Data source: da Gama & Varol 2013
First occurrence (base): within NN2 zone (19.00-22.82Ma, base in Aquitanian stage). Data source: da Gama & Varol 2013

Plot of occurrence data:


da Gama, R. O. B. P. & Varol, O. (2013). New Late Oligocene to Miocene Species. Journal of Nannoplankton Research. 33(1): 1-12. gs V O


Hughesius youngii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-2-2021

Taxon Search:
Advanced Search

Short stable page link: Go to 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
Captcha Image
Powered by Commentics