Nannotax3 - ntax_mesozoic - Bucanthus

Bucanthus


Classification: ntax_mesozoic -> Stephanolithiales -> Parhabdolithaceae -> Bucanthus
Sister taxa: Bucanthus, Calcivascularis, Crucirhabdus, Diductius, Mitrolithus, Parhabdolithus, Timorella, Umbria

Distinguishing features:
Parent taxon (Parhabdolithaceae): Murolith (protolith type) coccoliths with bicylic rims and central-areas spanned by an axial-cross or transverse bar bearing a broad, often long, spine.
This taxon: Protolith coccoliths with low, sloping rim; central area wide with offset central-cross.


Daughter taxa (time control age-window is: 0-800Ma)
Bucanthus decussatus
Protolith coccoliths with low, sloping rim and wide central area spanned by an offset central cross. Bicyclic rim image in XPL.
Bucanthus lusitanicus
Similar to B. decussatus, but smaller (<6 µm) and with symmetric cross
Bucanthus sp.
Specimens not identified to species level

Taxonomy:

Citation: Bucanthus Bown, 1987
Rank: Genus
Type species: Bucanthus decussatus Bown, 1987

Farinacci & Howe catalog pages: Bucanthus *

Distinguishing features:
Parent taxon (Parhabdolithaceae): Murolith (protolith type) coccoliths with bicylic rims and central-areas spanned by an axial-cross or transverse bar bearing a broad, often long, spine.
This taxon: Protolith coccoliths with low, sloping rim; central area wide with offset central-cross.


Morphology: Protolith coccoliths with low, sloping rim and wide central area spanned by an offset central cross. Bicyclic rim image in XPL.

Search data:
TagsLITHS: murolith, elliptical, CA: ca_disjunct, process, diagonal cross, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
MetricsLith size: 4->10µm;
Data source notes: 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 Kimmeridgian Stage (100% up, 152.1Ma, in Kimmeridgian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Pliensbachian Stage (0% up, 190.8Ma, in Pliensbachian stage). Data source: Total of range of species in this database

Plot of occurrence data:

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: 1-118. gs


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Bucanthus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 9-12-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10135 Go to Archive.is to create a permanent copy of this page - citation notes



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