Ottavianus


Classification: Mesozoic -> Holococcoliths -> Rarer genera -> Ottavianus
Sister taxa: Bifidalithus, Bilapillus, Multipartis, Munarinus, Octolithus, Okkolithus, Ottavianus, Pharus, Ramsaya, Russellia, Saepiovirgata ⟩⟨ Acuturris, Anfractus, Duocameratus, Lacunolithus-Bown, Metadoga, Nicholasia, Paulpearsonia, Petrobrasiella, Pseudoconus, Semihololithus, Stereorhabdus, Tanzanella, Thecatus, unidentified holococcoliths

Distinguishing features: Elliptical holococcolith with rim of multiple small elements, central are open except for bridge across short axis.


Daughter taxa: (blue => in age window 0-800Ma)
Ottavianus giannus

Ottavianus terrazetus

Ottavianus sp.
Specimens not identified to species level

Taxonomy:

Citation: Ottavianus Risatti, 1973
Rank: Genus
Type species: Ottavianus giannus Risatti, 1973

Farinacci & Howe catalog pages: Ottavianus *

Distinguishing features: Elliptical holococcolith with rim of multiple small elements, central are open except for bridge across short axis.


Morphology: Similar rim to Okkolithus but with distinct bridge in central area rather than several blocks (Wise & Wind 1977)

Search data:
TagsLITHS: holococcolith, elliptical, CA: ca_conjunct, bar, CROSS-POLARS: rim-unicyclic, R-prominent,
MetricsLith size: 4->6µm;
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): at base of Campanian Stage (0% up, 83.6Ma, in Campanian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

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

Risatti, J. B. (1973). Nannoplankton biostratigraphy of the Upper Bluffport Marl-Lower Prairie Bluff Chalk interval (upper Cretaceous) in Mississippi. In, Smith, L. A. & Hardenbol, J. (eds) Proceedings of the Symposium on Calcareous Nannofossils. Gulf Coast Section SEPM Publication, 8-57. gs

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 V O


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Ottavianus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 3-12-2020

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10836 Go to Archive.is to create a permanent copy of this page - citation notes



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