Watznaueria rawsonii


Classification: Mesozoic -> Watznaueriales -> Watznaueriaceae -> Watznaueria -> Watznaueria rawsonii
Sister taxa: W. barnesiae, W. bayackii, W. fossacincta, W. manivitiae, W. ovata, W. britannica, W. reinhardtii, W. biporta, W. cynthae, W. contracta, W. okadai, W. quadriradiata, W. fasciata, W. rawsonii, C. baticlypeata, W. sp.,

Distinguishing features:

Small-medium sized (4-6µm) Watznaueria with relatively wide central area (approximately the same width as the rim) spanned by an irregular grill of blocky laths. In LM the grill is impercetible or weakly birefringent.


Taxonomy:

Citation: Watznaueria rawsonii Crux, 1987
Rank: Species

Farinacci & Howe catalog pages: Watznaueria rawsonii *

Distinguishing features:

Small-medium sized (4-6µm) Watznaueria with relatively wide central area (approximately the same width as the rim) spanned by an irregular grill of blocky laths. In LM the grill is impercetible or weakly birefringent.


Morphology remarks:

Difficult to definitively identify in LM because the grill is imperceptible.

Search data:
TagsLITHS: placolith, elliptical,
CSPH: equant, monomorphic, R-UNITS: R-prominent, DETAILS: ca_conjunct, rim-unicyclic,
MetricsLith size: 4->6µm;
Sources: original description
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Barremian Stage (126.30-130.77Ma, top in Barremian stage). Data source: Bown et al. 1998
First occurrence (base): within Valanginian Stage (133.88-139.39Ma, base in Valanginian stage). Data source: Bown et al. 1998

Plot of occurrence data:

  • (NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Watznaueria

    References:

    Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Early Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 86-131. gs :: ::

    Crux, J. A. (1987). Six new species of calcareous nannofossils from the Lower Cretaceous strata of England and Germany. INA Newsletter. 9: 30-35. gs :: view :: open

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    Watznaueria rawsonii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 5-7-2020

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=11311 Go to Archive.is to create a permanent copy of this page - citation notes
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