Nannotax3 - ntax_mesozoic - Pharus

Pharus


Classification: ntax_mesozoic -> Holococcoliths -> Rarer genera -> Pharus
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: Elliptical coccolith formed of a single block, with two perforations


Daughter taxa (time control age-window is: 0-800Ma)
Pharus clarescopoli

Pharus simulacrum

Pharus sp.
Specimens not identified to species level

Taxonomy:

Citation: Pharus Wind & Wise in Wise & Wind, 1977
Rank: Genus
Type species: Pharus simulacrum Wind & Wise in Wise & Wind, 1977

Farinacci & Howe catalog pages: Pharus *

Distinguishing features:
Parent taxon (Rarer genera): Less common genera
This taxon: Elliptical coccolith formed of a single block, with two perforations


Morphology: Described as being formed of one or two blocks by Wise & Wind (1977) but the whole coccolith is clearly formed of mass of crystallites with very similar orientation - similar to modern Helicosphaera holococcoliths

Search data:
TagsLITHS: holococcolith, elliptical, CA: ca_conjunct, pores, bar, CROSS-POLARS: 1ou, R-prominent,
MetricsLith size: 4->5µm; Segments: 1->1;
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 Danian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Maastrichtian Stage (0% up, 72.1Ma, in Campanian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

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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Pharus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 29-1-2022

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10898 Go to Archive.is to create a permanent copy of this page - citation notes



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