Nannotax3 - ntax_mesozoic - Bifidalithus Nannotax3 - ntax_mesozoic - Bifidalithus

Bifidalithus


Classification: ntax_mesozoic -> Holococcoliths -> Rarer genera -> Bifidalithus
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 formed from two blocks divided by a transverse suture.


Daughter taxa (time control age-window is: 0-800Ma)
Bifidalithus geminicatillus
Narrow rim around edge of blocks, no pore
Bifidalithus mchanae
Pore on each block, no rim
Bifidalithus sp.
Specimens not identified to species level

Taxonomy:

Citation: Bifidalithus Varol, 1991
taxonomic rank: Genus
Type species: Bifidalithus geminicatillus Varol, 1991

Farinacci & Howe catalog pages: Bifidalithus *

Distinguishing features:
Parent taxon (Rarer genera): Less common genera
This taxon: Holococcoliths formed from two blocks divided by a transverse suture.

Search data:
LITHS: holococcolith, elliptical, CA: ca_disjunct, pores, CROSS-POLARS: rim-unicyclic, V-prominent,
Lith size: 4->7µm;
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 Early Maastrichtian Substage (100% up, 70.1Ma, in Maastrichtian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within Early Santonian Substage (85.20-85.70Ma, base in Santonian 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

Varol, O. (1991). New Cretaceous and Tertiary Calcareous Nannofossils. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 182: 211-237. gs


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Bifidalithus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 2-3-2024

Taxon Search:
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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10058 Go to Archive.is to create a permanent copy of this page - citation notes
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