Owenia partitum

Distinguishing features:
Parent taxon (Owenia): Holococcoliths with a narrow rim and a central structure comprising two or four blocks which typically incorporate a distal bridge-shaped structure which may extend into a spine; the blocks may be perforate.
This taxon: Holococcolith with narrow birefringent rim and central plate comprising two blocks crossed by four diagonal cross bars that are brightest at 0 degrees. joined along a transverse suture. The blocks may be perforate.

Taxonomy:

Farinacci & Howe catalog pages: O. partitum *

Distinguishing features:
Parent taxon (Owenia): Holococcoliths with a narrow rim and a central structure comprising two or four blocks which typically incorporate a distal bridge-shaped structure which may extend into a spine; the blocks may be perforate.
This taxon: Holococcolith with narrow birefringent rim and central plate comprising two blocks crossed by four diagonal cross bars that are brightest at 0 degrees. joined along a transverse suture. The blocks may be perforate.

Geological Range:
Last occurrence (top): within Early Cenomanian Substage (96.24-100.50Ma, top in Cenomanian stage). Data source: Kennedy et al. 2000
First occurrence (base): within Late Aptian Substage (113.20-118.70Ma, base in Aptian stage). Data source: Kennedy et al. 2000

Plot of occurrence data:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested
• (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Owenia

Owenia partitum compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-10-2024 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10843 Go to Archive.is to create a permanent copy of this page - citation notes

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