Nannotax3 - ntax_mesozoic - Gartnerago coxalliae

Gartnerago coxalliae


Classification: ntax_mesozoic -> Arkhangelskiales -> Kamptneriaceae -> Gartnerago -> Gartnerago coxalliae
Sister taxa: G. obliquum, G. segmentatum, G. costatum, G. diversum ⟩⟨ G. stenostaurion, G. clarusora, G. waszczakii ⟩⟨ G. chiasta, G. margaritatus, G. praeobliquum ⟩⟨ G. coxalliae, G. nanum, G. ponticula, G. theta, G. sp.

Distinguishing features:
Parent taxon (Gartnerago): Tiered coccoliths with distinctive LM images consisting of a narrow to moderately-broad rim with a narrow, dark outer-cycle; a diagnostic, bright median-cycle; and a dark, inner-cycle. Central-area structures variable but generally dark in LM.
This taxon: Central area, wide, open and spanned by a complex transverse bar, which bifurcates where it joins the rim.


Taxonomy:

Citation: Gartnerago? coxalliae Lees, 2007
Rank: Species
Synonyms:

Farinacci & Howe catalog pages: G. coxalliae * , A. megalops *

Distinguishing features:
Parent taxon (Gartnerago): Tiered coccoliths with distinctive LM images consisting of a narrow to moderately-broad rim with a narrow, dark outer-cycle; a diagnostic, bright median-cycle; and a dark, inner-cycle. Central-area structures variable but generally dark in LM.
This taxon: Central area, wide, open and spanned by a complex transverse bar, which bifurcates where it joins the rim.


Morphology:


Size:
Holotype dimensions: L = 7.04μm, W = 4.84μm.


Ecology & Biogeography


Biology & life-cycles

Phylogenetic relations

Search data:
LITHS: murolith, placolith, elliptical, CA: bar, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Lith size: 5.5->8µm;
Data source notes: original descriptions +/- 1µm
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Early Maastrichtian Substage (69.91-72.05Ma, top in Maastrichtian stage). Data source: Lees 2007 (original description)
First occurrence (base): within Late Coniacian Substage (86.26-87.86Ma, base in Coniacian stage). Data source: Blair & Watkins 2009

Plot of occurrence data:

References:

Blair, S. A. & Watkins, D. K. (2009). High-resolution calcareous nannofossil biostratigraphy for the Coniacian/Santonian Stage boundary, Western Interior Basin. Cretaceous Research. 30(2): 367-384. gs

Lees, J. A. (2007). New and rarely reported calcareous nannofossils from the Late Cretaceous of coastal Tanzania: outcrop samples and Tanzania Drilling Project Sites 5, 9 and 15. Journal of Nannoplankton Research. 29(1): 39-65. gs O


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Gartnerago coxalliae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 30-11-2022

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10462 Go to Archive.is to create a permanent copy of this page - citation notes



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