Nannotax3 - ntax_mesozoic - Crucibiscutum salebrosum

Crucibiscutum salebrosum


Classification: ntax_mesozoic -> Podorhabdales -> Biscutaceae -> Crucibiscutum -> Crucibiscutum salebrosum
Sister taxa: C. hayi, P. quadriperforatus ⟩⟨ C. bastetanum, C. gracile, C. neuquenensis, C. pinnatus, C. ryazanicum, C. salebrosum, C. trilensis, C. sp.

Distinguishing features:
Parent taxon (Crucibiscutum): Elliptical with prominent, birefringent, axial cross.
This taxon: Small (ca 3-5 µm) Crucibiscutum with narrow central area and birefringent cross. The central cross practically fills the narrow central area, and has the same intensity birefringence as the tube cycle (white).


Taxonomy:

Citation: Crucibiscutum salebrosum (Black, 1971) Jakubowski, 1986
Rank: Species
Basionym: Cruciplacolithus salebrosus Black, 1971)
Synonyms:

Farinacci & Howe catalog pages: C. salebrosus *

Distinguishing features:
Parent taxon (Crucibiscutum): Elliptical with prominent, birefringent, axial cross.
This taxon: Small (ca 3-5 µm) Crucibiscutum with narrow central area and birefringent cross. The central cross practically fills the narrow central area, and has the same intensity birefringence as the tube cycle (white).


Morphology:


Size:


Ecology & Biogeography


Biology & life-cycles

Phylogenetic relations

Search data:
LITHS: placolith, elliptical, CA: cross-axial, ca_disjunct, process, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Lith size: 4->5µm;
Data source notes: original description
The morphological data given here can be used on the advanced search page. See also these notes

See also: Jimenezberrocosoia bosunensis ;

Geological Range:
Notes: Late Cretceous records of this species may be Jimenezberrocosoia bosunensis. All imaged speciemns are of Early Cretaceous age.
Last occurrence (top): within Late Hauterivian Substage (130.77-133.09Ma, top in Hauterivian stage). Data source: Bown et al. 1998
First occurrence (base): within Berriasian Stage (139.39-145.01Ma, base in Berriasian stage). Data source: Bown et al. 1998

Plot of occurrence data:

References:

Black, M. (1971a). Coccoliths of the Speeton Clay and Sutterby Marl. Proceedings of the Yorkshire Geological Society. 38: 381-424. gs V O

Bown, P. R. & Concheyro, A. (2004). Lower Cretaceous calcareous nannoplankton from the Neuquen Basin, Argentina. In, Villa, G., Lees, J. A. & Bown, P. R. (eds) Calcareous Nannofossil Palaeoecology and Palaeocenographic Reconstructions, Proceedings of the INA9 conference, Parma 2002. Marine Micropaleontology . 52(1-4): 51-84. gs

Bown, P. R. (1992). New calcareous nannofossil taxa from the Jurassic/Cretaceous boundary interval of Sites 765 and 261, Argo Abyssal Plain. Proceedings of the Ocean Drilling Program, Scientific Results. 123: 369-379. gs V O

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

Jakubowski, M. (1986). New calcareous nannofossil taxa from the Lower Cretaceous of the North Sea. INA Newsletter. 8: 38-42. gs V O

Mutterlose, J. & Wise, S. W. (1990). Lower Cretaceous nannofossil biostratigraphy of ODP Leg 113 Holes 692B and 693A, continental slope off east Antarctica, Weddell Sea. Proceedings of the Ocean Drilling Program, Scientific Results. 113: 325-351. gs V O

Mutterlose, J. (1992b). Lower Cretaceous nannofossil biostratigraphy off northwestern Australia (Leg 123). Proceedings of the Ocean Drilling Program, Scientific Results. 123: 343-368. gs V O

Perch-Nielsen, K. (1984b). Validation of new combinations. INA Newsletter. 6(1): 42-46. gs V O

Sissingh, W. (1977). Biostratigraphy of Cretaceous calcareous nannoplankton. Geologie en Mijnbouw. 65(1): 37-65. gs

Wise, S. W. (1983). Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 71 in the Falkland Plateau region, Southwest Atlantic Ocean. Initial Reports of the Deep Sea Drilling Project. 71: 481-550. gs O


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Crucibiscutum salebrosum compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 3-12-2022

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