Watznaueria
Classification: ntax_mesozoic -> Watznaueriales -> Watznaueriaceae -> Watznaueria
Sister taxa: Bussonius, Cyclagelosphaera, Diazomatolithus, Lotharingius, Watznaueria ⟩⟨ Ansulasphaera, Bibreviconus, Perchnielsenella
Distinguishing features: Elliptical watznaueriacean coccoliths with central-areas that are typically closed or narrow but may be spanned by transverse bar, bars or grill. Extinction figure with clearly inflected arms.
Taxonomy:
Citation: Watznaueria Reinhardt, 1964Rank: GenusType species: Tremalithus barnesae Black, 1959 (= the junior synonym of Watznaueria angustoralis Reinhardt, 1964, the original designation) designated by Perch-Nielsen, 1968.Synonyms:
- Colvillea Black 1964
- Caterella Black, 1971a
- Calolithus Noël, 1965
- Maslovella Tappan & Loeblich 1966
- Margolatus Forchheimer 1972
- Coptolithus Black, 1973
- Actinosphaera Noël 1965
Variants:
- Ellipsagelosphaera Noël, 1965. This name has been used in various senses but the type species E. frequens (a junior synonym of W. britannica) unambiguously has a disjunct bar and so the name could be used for species with this character. Varol & Bowman (2019) use the name in this sense.
Farinacci & Howe catalog pages: Watznaueria * , Ellipsagelosphaera * , Actinosphaera * , Caterella * , Calolithus * , Coptolithus * , Colvillea * , Maslovella * , Margolatus *
Distinguishing features: Elliptical watznaueriacean coccoliths with central-areas that are typically closed or narrow but may be spanned by transverse bar, bars or grill. Extinction figure with clearly inflected arms.
Morphology: The generic concepts applied to these kinds of coccoliths have been rather inconsistently applied with different kinds of central area bars used as diagnostic characters (e.g., Ellipsagelosphaera for forms with transverse bars). Here we use Watznaueria in a broad sense, but retain Lotharingius for the oldest, early Jurassic, representatives, and Cyclagelosphaera for circular forms.
Search data:
| Tags | LITHS: placolith, equant, monomorphic, |
| Metrics | Lith size: 4->12µm;
Data source notes: size range of included species |
The morphological data given here can be used on the advanced search page. See also these notes
Geological Range:
Last occurrence (top): at top of Maastrichtian Stage (100% up, 66Ma, in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Aalenian Stage (62% up, 171.8Ma, in Aalenian stage). Data source: Total of range of species in this database
Plot of occurrence data:
- Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
- Triangles indicate an event for which a precise placement has been suggested
- Neptune data: This is a higher taxon page so Neptune data is not plotted. See also: customisable plot Parent: Watznaueriaceae
References:
Black, M. (1971a). Coccoliths of the Speeton Clay and Sutterby Marl. Proceedings of the Yorkshire Geological Society. 38: 381-424. gs
Black, M. (1973). British Lower Cretaceous Coccoliths. I-Gault Clay (Part 2). Palaeontographical Society Monograph. 127: 49-112. 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
Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs V O
Noël, D. (1965b). Sur les Coccolithes du Jurassique Européen et d'Afrique du Nord. Éditions du Centre National de la Recherche Scientifique, Paris. 1-209. 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 V O
