Chiastella


Classification: Mesozoic -> Podorhabdales -> Biscutaceae -> Chiastella
Sister taxa: Biscutum, Boletuvelum, Chiastella, Crucibiscutum, Discorhabdus, Gaarderella, Gephyrobiscutum, Helicorhabdus, Jimenezberrocosoia, Seribiscutum, Similiscutum, Sollasites,

Distinguishing features: Elliptical, minute with diagonal cross suporting a hollow spine


Daughter taxa: (blue => in age window 0-300Ma)

Taxonomy:

Citation: Chiastella Lambert 1993
Rank: Genus
Notes & discussion: Assignment here to Biscutaceae is tentative since only a couple of SEM images are available, but if it is correct then the one species, C. grana, could be reassigned to Crucibiscutum.

Farinacci & Howe catalog pages: Chiastella *

Distinguishing features: Elliptical, minute with diagonal cross suporting a hollow spine


Size: <2 µm

Geological Range:
Last occurrence (top): within Albian Stage (100.50-112.95Ma, top in Albian stage). Data source: Total of range of species in this database
First occurrence (base): within Albian Stage (100.50-112.95Ma, base in Albian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

Lambert, B., (1993). Nannofossiles calcaires de l'Albien supérieur et du Vraconnien du Cameroun méridional (Deuxième Partie). Cahiers de Micropaleontologie, 8(2): 183-225.


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Chiastella compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-7-2018

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