Arkhangelskiella cymbiformis


Classification: Mesozoic -> Arkhangelskiales -> Arkhangelskiellaceae -> Arkhangelskiella -> Arkhangelskiella cymbiformis
Sister taxa: A. cymbiformis, A. maastrichtiensis, A. specillata, A. sp.,

Distinguishing features: Varible sized, with a narrow rim (<1.5µm)


Taxonomy:

Citation: Arkhangelskiella cymbiformis Vekshina, 1959
Rank: Species
Variants: Varol 1989 suggested that three morphotypes could usefully be distinguished within the A. cymbiformis group based on coccolith size, and rim width. He termed them varieties N, NT and W. Subsequently Burnett (1997) separated these as species - A. confusa. A. cymbiformis and A. maastrichtiensis. Linnert & Mutterlose (2009), however, concluded that only one, morphologically variable species, was present. In particular they showed that separating the narrow rim width form was of very limited value ,even though they studied the time interval during which Varol (1989) recorded it as common. 
Linnert & Mutterlose (2009) also suggested that the maastrichtiana morphotype was simply a wide-rimmed variant of cymbiformis, but they did not include the Late Maastrichtian when this form is recorded as being best developed, so this form may still be worth separating.




Synonyms:

Farinacci & Howe catalog pages: Arkhangelskiella cymbiformis + + * , Arkhangelskiella cymbiformis NT * , Discolithus octocentralis *

Distinguishing features: Varible sized, with a narrow rim (<1.5µm)

Search data:
TagsLITHS: placolith, elliptical, CA: plate, pores, closed, R-UNITS: R-prominent, DETAILS: rim-unicyclic,
MetricsLith size: 5->12µm;
Sources: illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: Linnert & Mutterlose (2009) show that the mean length of Arkhangellskiella specimens is about 6.5-7µm through the Campanain but 8-9 µm in the Maastrichtian - base on a study of DSDP site 390 (Blake Nose, NW Atlantic).
Last occurrence (top): at top of Maastrichtian Stage (100% up, 66Ma, in Maastrichtian stage). Data source: Lees & Bown 2005 - consistently present to end Cret
First occurrence (base): at base of UC13 zone (0% up, 83.2Ma, in Campanian stage). Data source: Burnett 1998 (zonal marker)

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: Arkhangelskiella cymbiformis, synonyms included - Arkhangelskiella cymbiformis; Arkhangelskiella cymbiformis var. NT;
  • space-time plot :: Samples map :: Parent: Arkhangelskiella

    References:

    Bukry, D. (1969). Upper Cretaceous coccoliths from Texas and Europe. The University of Kansas Paleontological Contributions. Article 51 (Protista 2): 1-79. gs

    Burnett, J. A. (1997c). New species and new combinations of Cretaceous nannofossils and a note on the origin of Petrarhabdus (Deflandre) Wise & Wind. Journal of Nannoplankton Research. 19(2): 133-146. gs

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

    Cepek, P. (1978). Mesozoic calcareous nannoplankton of the Eastern North Atlantic, Leg 41. Initial Reports of the Deep Sea Drilling Project. 41: 667-687. gs

    Lees, J. A. & Bown, P. R. (2005). Upper Cretaceous calcareous nannofossil biostratigraphy, ODP Leg 198 (Shatsky Rise, Northwest Pacific Ocean). Proceedings of the Ocean Drilling Program. Scientific Results. 198: 1-60. gs

    Linnert, C. & Mutterlose, J. (2009). Biometry of the Late Cretaceous Arkhangelskiella group: ecophenotypes controlled by nutrient flux. Cretaceous Research. 30: 1193-1204. gs

    Mai, H. (2001). New coccolithophorid taxa fom the Guelhemmerberg airshaft. Lower Paleocene, The Netherlands. Micropaleontology. 47: 144-154. gs

    Mai, H., von Salis, K., Willems, H. & Romein, A. J. T. (1997a). Fossil coccospheres from the K/T boundary section from Geulhemmerberg, The Netherlands. Micropaleontology. 43(281-302): -. gs

    Müller, C. (1974b). Calcareous nannoplankton, Leg 25 (Western Indian Ocean). Initial Reports of the Deep Sea Drilling Project. 25: 579-633. 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

    Pospichal, J. J. & Wise, S. W. (1990a). Calcareous nannofossils across the K/T boundary, ODP hole 690C, Maud Rise, Weddell Sea. Proceedings of the Ocean Drilling Program. Scientific Results. 113: 515-532. gs

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

    Thibault, N. (2010). Calcareous nannofossils from the boreal Upper Campanian- Maastrichtian chalk of Denmark. Journal of Nannoplankton Research. 30(1): 39-56. gs

    Varol, O. (1989d). Quantitative analysis of the Arkhangelskiella cymbiformis group and its biostratigraphical usefulness in the North Sea area. Journal of Micropalaeontology. 8: 131-134. gs

    Vekshina, V. N. (1959). Coccolithophoridae of the Maastrichtian deposits of the West Siberian lowlands. Siberian Science Research Institute of Geology Geophysics Mineralogy and Raw Materials. 2: 56-81. gs


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    Arkhangelskiella cymbiformis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 26-2-2020

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10037 Go to Archive.is to create a permanent copy of this page - citation notes



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