arrayname: original
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:
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:
LITHS: murolith, elliptical, CA: diagonal cross, process, ca_disjunct, CROSS-POLARS: R-prominent, V-prominent, rim-bicyclic, |
Lith size: 4->10µm; Data source notes: size range of included species |
Geological Range:
Last occurrence (top): at top of Kimmeridgian Stage (100% up, 149.2Ma, in Tithonian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Pliensbachian Stage (184.20-192.90Ma, base in Pliensbachian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
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 O Bown, P. R. & Young, J. R. (1997). Mesozoic calcareous nannoplankton classification. Journal of Nannoplankton Research. 19(1): 21-36. gs Bown, P. R. (1987a). Taxonomy, evolution, and biostratigraphy of Late Triassic-Early Jurassic calcareous nannofossils. Special Papers in Palaeontology. 38: 1-118. gsReferences:
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Bucanthus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-3-2025
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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