Nannotax3 - ntax_mesozoic - Acuturris Nannotax3 - ntax_mesozoic - Acuturris

Acuturris


Classification: ntax_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:
Parent taxon (Rarer genera): Less common genera
This taxon: Holococcoliths with a proximal plate of three blocks and tall, tapering spines.


Daughter taxa (time control age-window is: 0-800Ma)
Acuturris scotus
Holococcoliths with a proximal plate of three blocks and tall, tapering spines.
Acuturris sp.
Specimens not identified to species level

Taxonomy:

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

Farinacci & Howe catalog pages: Acuturris *

Distinguishing features:
Parent taxon (Rarer genera): Less common genera
This taxon: Holococcoliths with a proximal plate of three blocks and tall, tapering spines.

Search data:
LITHS: holococcolith, elliptical, rod-shaped, CA: ca_conjunct, process, closed, CROSS-POLARS: rim-unicyclic,
Lith size: 10->30µm; Segments: 3->3;
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 Late Maastrichtian Substage (100% up, 66Ma, in Danian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Cenomanian Stage (93.90-100.50Ma, base in Cenomanian stage). Data source: Total of ranges 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 O

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 O


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Acuturris compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 5-10-2024

Taxon Search:
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Short stable page link: https://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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