Watznaueria britannica


Classification: Mesozoic -> Watznaueriales -> Watznaueriaceae -> Watznaueria -> Watznaueria britannica
Sister taxa: W. barnesiae, W. bayackii, W. fossacincta, W. manivitiae, W. ovata, W. britannica, W. reinhardtii, W. biporta, W. cynthae, W. contracta, W. okadai, W. quadriradiata, W. fasciata, W. rawsonii, C. baticlypeata, W. sp.,

Distinguishing features: Watznaueria with narrow central-area spanned by a transverse bar.


Daughter taxa: (blue => in age window 0-800Ma)
Species regarded here as varieties of W. britannica
Large (>10 µm) with central opening filled by disjunct bar.
Medium sized(<10 µm) with central opening filled by disjunct bar.

Taxonomy:

Citation: Watznaueria britannica (Stradner, 1963) Reinhardt, 1964
Rank: Species
Basionym: Coccolithus britannicus Stradner, 1963
Variants: Notes & discussion: The name W. communis is probably best regarded as a junior synonym or variant of Watznaueria britannica (Stradner, 1963) Reinhardt, 1964. Most authors do not separate the taxa but the distinct obliquity shown in the type specimen is a possible basis for separation.

A few authors, e.g. Casellato (2010) have used the name W. communis for a morphotype with an optically continuous bridge which nearly fills the central area. Whilst this morphotype is probably worth distinguishing it does not correspond to the holotype of W. communis and so it should be given a different name. The specimens illustrated by Casellato (2010) are now included in Watznaueria sp. 
Synonyms:
Notes & discussion: According to de Kaenel (oral comm. during 2016 Jurassic workshop) some industry workers use the name W. frequens for small early forms of W. britannica with a narrow opening. This taxon concept is very close to that of Lotharingius frodoi and the latter name seems preferable, both because the name E. frequens has been widely used with other meanings and because its holotype does not clearly fit this concept.

Farinacci & Howe catalog pages: Coccolithus britannicus * , Ellipsagelosphaera frequens * , Ellipsagelosphaera lucasi * , Ellipsagelosphaera gephyrocapsoides * , Watznaueria communis *

Distinguishing features: Watznaueria with narrow central-area spanned by a transverse bar.


Morphology remarks: Often the dominant coccolith in Middle and Upper Jurassic assemblages, becoming rarer in the lower Cretaceous.

Geological Range:
Last occurrence (top): within UC1a subzone (100.03-100.45Ma, top in Cenomanian stage). Data source: Burnett 1998
First occurrence (base): at base of NJ9 zone (0% up, 170.1Ma, in Bajocian stage). Data source: Bown & Cooper 1998 (fig 4) - zonal event

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: Watznaueria britannica, synonyms included - Ellipsagelosphaera britannica; Ellipsagelosphaera communis; Ellipsagelosphaera frequens; Watznaueria britannica; Watznaueria communis; Watznaueria frequens;
  • space-time plot :: Samples map :: Parent: Watznaueria

    References:

    Barnard, T. & Hay, W. W. (1974). On Jurassic coccoliths: A tentative zonation of the Jurassic of Southern England and North France. Eclogae Geologicae Helvetiae. 67(3): 563-585. gs

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

    Bown, P. R. & Concheyro, A. (2004). Lower Cretaceous calcareous nannoplankton from the Neuquen Basin, Argentina. Marine Micropaleontology. 52(1-4): 51-84. gs

    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

    Bown, P. R. (2005c). Early to Mid-Cretaceous Calcareous Nannoplankton from the Northwest Pacific Ocean, Leg 198, Shatsky Rise. Proceedings of the Ocean Drilling Program. Scientific Results. 198: 1-82. gs

    Bown, P. R., Cooper, M. K. E. & Lord, A. R. (1988). A calcareous nannofossil biozonation scheme for the early to mid Mesozoic. Newsletters on Stratigraphy. 20: 91-114. gs

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

    Casellato, C. E. (2010). Calcareous nannofossil biostratigraphy of Upper Callovian - Lower Berriasian successions from the Souhern Alps, North Italy. Rivista Italiana di Paleontologia e Stratigrafia. 116(3): 357-404. gs

    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

    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

    Grün, W. & Allemann, F. (1975). The Lower Cretaceous of Caravaca (Spain): Berriasian Calcareous Nannoplankton of the Miravetes Section (Subbetic Zone, Prov. of Murcia). Eclogae Geologicae Helvetiae. 68: 147-211. gs

    Grün, W. & Zweili, F. (1980). Das kalkige Nannoplankton der Dogger-Malm-Grenze im Berner Jura bei Liesberg (Schweiz). Jahrbuch der Geologischen Bundesanstalt. 123: 231-341. gs

    Medd, A. W. (1979). The Upper Jurassic coccoliths from the Haddenham and Gamlingay boreholes (Cambridgeshire, England). Eclogae Geologicae Helvetiae. 72: 19-109. gs

    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

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

    Noël, D. (1965). Sur les Coccolithes du Jurassique Européen et d'Afrique du Nord. Éditions du Centre National de la Recherche Scientifique, Paris. -. gs

    Noël, D. (1973). Nannofossiles calcaires de sédiments jurassiques finement laminés. Bulletin du Muséum National d'Histoire Naturelle. 3e serie, 75: 95-156. gs

    Perch-Nielsen, K. (1968c). Der Feinbau und die Klassifikation der Coccolithen aus dem Maastrichtien von Danemark. Biologiske Skrifter. Kongelige Danske Videnskabernes Selskab. 16: 1-96. gs

    Reinhardt, P. (1964). Einige Kalkflagellaten-Gattungen (Coccolithophoriden, Coccolithineen) aus dem Mesozoikum Deutschlands. Monatsberichte der Deutschen Akademie der Wissenschaften zu Berlin. 6: 749-759. gs

    Rood, A. P., Hay, W. W. & Barnard, T. (1971). Electron Microscope Studies of Oxford Clay Coccoliths. Eclogae Geologicae Helvetiae. 64: 245-272. gs

    Stradner, H. (1963). New contributions to Mesozoic stratigraphy by means of nannofossils. Proceedings of the Sixth World Petroleum Congress. Section 1 Paper 4: 167-183. gs

    Stradner, H., Aubry, M. -P. & Bonnemaison, M. (2010). Calcareous nannofossil type specimens in the collection of the Geological Survey of Austria: A taxonomic and stratigraphic update. Jahrbuch der Geologischen Bundesanstalt. 150(1-2): 9-84. gs

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

    Young, J. R. & Bown, P. R. (1991). An ontogenetic sequence of coccoliths from the Late Jurassic Kimmeridge Clay of England. Palaeontology. 34: 843-850. gs


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    Watznaueria britannica compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 19-10-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=11302 Go to Archive.is to create a permanent copy of this page - citation notes



    Comments (1)

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    maryam (Iran)
    many thanks for pictures and diagnosis but I have encountered a problem for centrifuge time.
    What time could be better for centrifuge? I did 30 seconds.
    Gravatar
    Jeremy Young (UCL, UK)
    Hi Maryam
    Centrifuging is not a very precise preparation technique with nannos and times will vary between centrifuges. Actually few workers use centrifugation now.
    Jeremy
    Page 1 of 1
     

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