Crucibiscutum hayi


Classification: Mesozoic -> Podorhabdales -> Biscutaceae -> Crucibiscutum -> Crucibiscutum hayi
Sister taxa: C. hayi, C. neuquenensis, C. pinnatus, C. ryazanicum, C. salebrosum, C. trilensis, P. quadriperforatus, C. sp.,

Distinguishing features: Medium-sized (ca 5-6 µm)Crucibiscutum with relatively wide central area, relatively narrow rim and slender-armed axial cross.


Taxonomy:

Citation: Crucibiscutum hayi (Black, 1973) Jakubowski, 1986
Rank: Species
Basionym: Cruciplacolithus hayi Black, 1973
Synonyms: Sollasites hayi

Farinacci & Howe catalog pages: C. hayi *

Distinguishing features: Medium-sized (ca 5-6 µm)Crucibiscutum with relatively wide central area, relatively narrow rim and slender-armed axial cross.


Morphology remarks: Distinguished from Crucibiscutum salebrosum and Crucibiscutum pinnatus by its larger size, relatively wide central area and relatively narrow rim. The slender-armed axial cross is only weakly birefringent. The overall proportions of this species are more similar to Sollasites than to Biscutum and Perch-Nielsen (1985) included it in the former genus.

Search data:
TagsLITHS: placolith, elliptical, CA: cross-axial, ca_disjunct, process, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
MetricsLith size: 5->6µm;
Data source notes: illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: Lees (2007) reports specimens from the Maastrichtian of Tanzania
Last occurrence (top): within Cenomanian Stage (93.90-100.50Ma, top in Cenomanian stage). Data source: Bown et al. 1998
First occurrence (base): within Albian Stage (100.50-112.95Ma, base in Albian stage). Data source: Bown et al. 1998

Plot of occurrence data:

References:

Black, M. (1973). British Lower Cretaceous Coccoliths. I-Gault Clay (Part 2). Palaeontographical Society Monograph. 127: 49-112. gs

Bown, P. R. (2001). Calcareous nannofossils of the Gault, Upper Greensand and Glauconitic Marl (Middle Albian-Lower Cenomanian) from the BGS Selborne boreholes, Hampshire. Proceedings of the Geologists' Association. 112: 223-236. gs

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

Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs V O

Covington, J. M. & Wise, S. W. (1987). Calcareous nannofossil biostratigraphy of a Lower Cretaceous deep-sea fan complex: Deep Sea Drilling Project Leg 93 Site 603, lower continental rise off Cape Hatteras. Initial Reports of the Deep Sea Drilling Project. 93: 617-660. gs V O

Gale, A. S., Kennedy, W. J., Burnett, J. A., Caron, M. & Kidd, B. E. (1996). The Late Albian to Early Cenomanian succession at Mont Risou, near Rosans (Drôme, SE France): an integrated study (ammonites, inoceramids, planktonic foraminifera, nannofossils, oxygen and carbon isotopes). Cretaceous Research. 17: 515-606. gs

Gale, A. S. et al. (2011). The uppermost Middle and Upper Albian succession at the Col de Palluel, Hautes-Alpes, France: An integrated study (ammonites, inoceramid bivalves, planktonic foraminifera, nannofossils, geochemistry, stable oxygen and carbon isotopes, cyclostratigraphy). Cretaceous Research. 32: 59-130. gs

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

Jeremiah, J. (1996). A proposed Albian to Lower Cenomanian nannofossil biozonation for England and the North Sea Basin. Journal of Micropalaeontology. 15(97-129): -. gs V O

Lees, J. A. (2007). New and rarely reported calcareous nannofossils from the Late Cretaceous of coastal Tanzania: outcrop samples and Tanzania Drilling Project Sites 5, 9 and 15. Journal of Nannoplankton Research. 29(1): 39-65. gs V O

Perch-Nielsen, K. (1985b). Mesozoic calcareous nannofossils. In, Bolli, H. M. , Saunders, J. B. & Perch-Nielsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge 329-426. gs


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Crucibiscutum hayi compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 30-9-2020

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