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 0-800Ma)
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.

Search data:
TagsLITHS: holococcolith, elliptical, rod-shaped, CA: process, closed, DETAILS: ca_conjunct, rim-unicyclic,
MetricsLith size: 10->30┬Ám; Segments: 3->3;
Sources: 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 Cenomanian Stage (0% up, 100.5Ma, 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. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. 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 :: view :: open


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Acuturris compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-7-2020

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10005 Go to Archive.is to create a permanent copy of this page - citation notes



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