Acuturris


Classification: Mesozoic -> Holococcoliths -> Rarer genera -> Acuturris
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: Holococcoliths with a proximal plate of three blocks and tall, tapering spines.


Daughter taxa: (blue => in age window 0-300Ma)
Holococcoliths with a proximal plate of three blocks and tall, tapering spines.
Specimens not identified to species level

Taxonomy:

Citation: Acuturris Wind & Wise in Wise & Wind, 1977
Rank: Genus
Type species: Acuturris scotus (Risatti, 1973) Wind & Wise in Wise & Wind, 1977

Farinacci & Howe catalog pages: Acuturris *

Distinguishing features: Holococcoliths with a proximal plate of three blocks and tall, tapering spines.

Geological Range:
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): within Cenomanian Stage (93.90-100.50Ma, base in Cenomanian 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. (Editor), Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publications Series. Chapman & Hall, London, pp. 132-199.

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).


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Acuturris compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-11-2018

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