Watznaueria deflandrei
Set number: 1781
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10µm
Set number: 1780
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10µm
Set number: 1779
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10µm
Set number: 1775
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10µm
Set number: 1774
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10µm
Set number: 1773
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10µm
Watznaueria deflandrei Noël, 1965
Tremalithus barnesiae Black in Black & Barnes, 1959; Under the ICN, any species name originally published in association with a provisional genus is not validly published (ICN Art. 35.1) and therefore has no standing under the ICN.
Watznaueria barnesiae (Black in Black & Barnes, 1959) Perch-Nielsen, 1968; Invalid according to ICN Art. 35.1.
In this study, elliptical specimens of Watznaueria measuring less than 8.0 µm in length and characterised by a closed central area are assigned to Watznaueria deflandrei.
In distal view, the extinction angles measured from the distal side are typically approximately 73° in the distal shield. This angle cannot be directly measured in the tube cycles due to the oblique orientation of their constituent segments; however, the apparent angle between extinction directions in the tube cycle is approximately 63°, corresponding to an obliquity of approximately 27°. The locking cycle remains in constant extinction, forming a narrow dim suture between the shield and tube cycle.
Watznaueria deflandrei is distinguished from Watznaueria paenepelagica by its smaller size (<8.0 µm), although both species display broadly similar extinction characteristics.
Black, M. & Barnes, B. 1959. The structure of Coccoliths from the English Chalk. Geological Magazine. 96(5): 321-328.
Noël, D. 1965. Sur les Coccolithes du Jurassique Européen et d'Afrique du Nord. Essai de classification des coccolithes fossiles. Éditions du Centre National de la Recherche Scientifique, Paris. 1-129.
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.
Reinhardt, P. 1971. Synopsis der Gattungen und Arten der mesozoischen Coccolithen und anderer kalkiger Nannofossilien. Teil III. – Freiberger Forschungshefte. C267: 19–41.