Nannotax3 - ntax_mesozoic - Haqius peltatus <title>Nannotax3 - ntax_mesozoic - Haqius peltatus

Haqius peltatus


Classification: ntax_mesozoic -> Heterococcoliths inc sedis -> placoliths inc sedis -> Haqius -> Haqius peltatus
Sister taxa: H. circumradiatus, H. ellipticus, H. peltatus, H. sp.

Distinguishing features:
Parent taxon (Haqius): Unicyclic, elliptical and circular placolith coccoliths with a narrow or closed central area and a characteristically dark gray (low birefringence) XPL image.
This taxon: Small to medium (3-7 µm) elliptical Haquis species 


Taxonomy:

Citation: Haqius peltatus Bown, 2005
Rank: Species

Farinacci & Howe catalog pages: H. peltatus *

Distinguishing features:
Parent taxon (Haqius): Unicyclic, elliptical and circular placolith coccoliths with a narrow or closed central area and a characteristically dark gray (low birefringence) XPL image.
This taxon: Small to medium (3-7 µm) elliptical Haquis species 


Morphology:

Small (<6.5 µm), elliptical, unicyclic placoliths with a narrow or closed central area. Under LM XPL the shields appear gray and individual elements are usually visible. Some specimens possess small bar-like structures that cross the narrow central area.

Differentiated from Haqius ellipticus by size and from H. circumradiatus by outline (elliptical).

Size:


Ecology & Biogeography


Biology & life-cycles

Phylogenetic relations

Search data:
LITHS: placolith, elliptical, CROSS-POLARS: rim-unicyclic, V-prominent,
Lith size: 3->7µm;
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 NC8a subzone (112.65-112.95Ma, top in Albian stage). Data source: Bown 2005
First occurrence (base): within Berriasian Stage (139.39-145.01Ma, base in Berriasian stage). Data source: Bown 2005

Plot of occurrence data:

References:

Bown, P. R. (2005c). Early to Mid-Cretaceous Calcareous Nannoplankton from the Northwest Pacific Ocean, Leg 198, Shatsky Rise. Proceedings of the Ocean Drilling Program, Scientific Results. 198: 1-82. gs O


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Haqius peltatus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 31-1-2023

Taxon Search:
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AphiaID: not found
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10493 Go to Archive.is to create a permanent copy of this page - citation notes



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