Biscutum depravatus


Classification: Mesozoic -> Podorhabdales -> Biscutaceae -> Biscutum -> Biscutum depravatus
Sister taxa: B. arrogans, B. asymmetricum, B. boletum, B. constans, B. coronum, B. davyi, B. dekaenelii, B. depravatus, B. dissimilis, B. dorsetensis, B. dubium, B. ellipticum, B. erismatum, B. gaultensis, B. grande, B. hattneri, B. intermedium, B. magnum, B. melaniae, B. notaculum, B. planum, B. profundum, B. thurowii, B. virginica, B. zulloii, B. sp.,

Distinguishing features: Normally elliptical Biscutum with relatively narrow shields and open central area spanned by cross bars slightly rotated from axial. Unicyclic image in XPL.


Taxonomy:

Citation: Biscutum depravatus (Grün & Zweili, 1980) Bown, 1987
Rank: Species
Basionym: Axopodorhabdus depravatus Grün & Zweili, 1980

Farinacci & Howe catalog pages: Axopodorhabdus depravatus *

Distinguishing features: Normally elliptical Biscutum with relatively narrow shields and open central area spanned by cross bars slightly rotated from axial. Unicyclic image in XPL.

Geological Range:
Last occurrence (top): within Middle Oxfordian Substage (159.70-160.84Ma, top in Oxfordian stage). Data source: Bown & Cooper 1998
First occurrence (base): within Aalenian Stage (170.30-174.15Ma, base in Aalenian stage). Data source: Bown & Cooper 1998

Plot of occurrence data:

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

    References:

    Bown, P. R. & Cooper, M. K. E. (1998). Jurassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 34-85. gs

    Bown, P. R. (1987a). Taxonomy, evolution, and biostratigraphy of Late Triassic-Early Jurassic calcareous nannofossils. Special Papers in Palaeontology. 38: 118-. gs

    Grün, W. & Zweili, F. (1980). Das kalkige Nannoplankton der Dogger-Malm-Grenze im Berner Jura bei Liesberg (Schweiz). Jahrbuch der Geologischen Bundesanstalt. 123: 231-341. gs


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    Biscutum depravatus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-11-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10075 Go to Archive.is to create a permanent copy of this page - citation notes



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