Gorkaea


Classification: Mesozoic -> Eiffellithales -> Chiastozygaceae -> Gorkaea
Sister taxa: Amphizygus, Archaeozygodiscus, Gorkaea, Placozygus, Reinhardtites, Tranolithus, Zeugrhabdotus, Chiastozygus, Staurolithites, Diadorhombus, Rhabdophidites, Ahmuellerella, Bukrylithus, Diloma, Heteromarginatus, Misceomarginatus, Monomarginatus, Vacherauvillius, Braloweria, Clepsilithus, Crepidolithus, Loxolithus, Neocrepidolithus, Tubirhabdus,

Distinguishing features: Bicyclic (LM) muroliths with broad, bright inner-cycle and robust, birefringent, transverse bar.


Daughter taxa: (blue => in age window 0-800Ma)



Specimens not identified to species level

Taxonomy:

Citation: Gorkaea Varol & Girgis, 1994
Rank: Genus
Type species: Zygodiscus? pseudanthophorus Bramlette & Martini, 1964

Farinacci & Howe catalog pages: Gorkaea *

Distinguishing features: Bicyclic (LM) muroliths with broad, bright inner-cycle and robust, birefringent, transverse bar.

Search data:
TagsLITHS: murolith, elliptical, CA: bar, R-UNITS: R-prominent, DETAILS: ca_disjunct, rim-bicyclic,
MetricsLith size: 4->16µm;
Sources: size range of included species
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): at top of Maastrichtian Stage (100% up, 66Ma, in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): in lower part of Albian Stage (43% up, 107.6Ma, in Albian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Varol, O. & Girgis, M. (1994). New taxa and taxonomy of some Jurassic to Cretaceous calcareous nannofossils. Neues Jahrbuch für Geologie und Paläontologie Abhandlungen. 192: 221-253. gs


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Gorkaea compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-2-2020

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10480 Go to Archive.is to create a permanent copy of this page - citation notes



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