Nannotax3 - Mesozoic - Biscutum coronum

Biscutum coronum

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

Distinguishing features: Large (>8µm) Biscutum with moderately narrow central area with clear non-birefringent axial structure and well-developed, bright, inner tube cycle.

Thibault 2010 pl4-fig16.JPG
Wise & Wind 1977-DSDP36-pl24-12.JPG
PospWiseLeg113-Maas-Pl2-Fig1a-c.JPG
Thibault 2010 pl4-fig17.JPG

Taxonomy:

Citation: Biscutum coronum Wind & Wise in Wise & Wind, 1977

Rank: Species

Farinacci & Howe catalog pages: Biscutum coronum *

Distinguishing features: Large (>8µm) Biscutum with moderately narrow central area with clear non-birefringent axial structure and well-developed, bright, inner tube cycle.

Search data:

Tags	LITHS: placolith, elliptical, CA: closed, V-UNITS: V-prominent, R-UNITS: R-prominent, DETAILS: ca_disjunct, rim-bicyclic,
Metrics	Lith size: 7->10µm; Sources: holotype +/- 1µm & illustrated specimens

The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: LAD in Late Campanian, UC15d, in tethyan province (Burnett 1998)
Last occurrence (top): in mid part of UC18 zone (50% up, 70.6Ma, in Maastrichtian stage). Data source: Burnett 1998, fig 6.6
First occurrence (base): in upper part of UC9a subzone (60% up, 91.1Ma, in Turonian stage). Data source: Burnett 1998, fig.6.3

Plot of occurrence data:

Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes

Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.

Taxon plotted: Biscutum coronum, synonyms included - Biscutum coronum;

space-time plot :: Samples map :: Parent: Biscutum

References:

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

Pospichal, J. J. & Wise, S. W. (1990b). Maestrichtian calcareous nannofossil biostratigraphy of Maud Rise ODP leg 113 sites 689 and 690, Weddell Sea. Proceedings of the Ocean Drilling Program, Scientific Results. 113: 465-487. gs :: view :: open

Thibault, N. (2010). Calcareous nannofossils from the boreal Upper Campanian- Maastrichtian chalk of Denmark. Journal of Nannoplankton Research. 31(1): 39-56. gs :: view :: open

Wise, S. W. & Wind, F. H. (1977). Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 36 drilling on the Falkland Plateau, south-west Atlantic sector of the Southern Ocean. Initial Reports of the Deep Sea Drilling Project. 36(269-491): -. gs :: view :: open