Nannotax3 - ntax_mesozoic - Duocameratus Nannotax3 - ntax_mesozoic - Duocameratus


Classification: ntax_mesozoic -> Holococcoliths -> Rarer genera -> Duocameratus
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: Cavate holococcolith with central septum

Daughter taxa (time control age-window is: 0-800Ma)
Duocameratus leariae
Kite-shaped in typical view, with septum running along long axis, pointed end with thickening of the wall
Duocameratus sianiae
Pentagonal shape in profile with flattened base, and pointed distal surface and slightly flaring walls; septum central.
Duocameratus sp.
Specimens not identified to species level


Citation: Duocameratus Lees, 2007
taxonomic rank: Genus
Type species: Duocameratus leariae Lees, 2007

Farinacci & Howe catalog pages: Duocameratus *

Distinguishing features:
Parent taxon (Rarer genera): Less common genera
This taxon: Cavate holococcolith with central septum

Search data:
LITHS: holococcolith, pentagonal, quadrate, hollow, CA: bar, CROSS-POLARS: 1ou,
Lith size: 2.5->5µm;
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 Turonian Stage (100% up, 89.4Ma, in Turonian 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:


Lees, J. A. (2007). New and rarely reported calcareous nannofossils from the Late Cretaceous of coastal Tanzania: outcrop samples and Tanzania Drilling Project Sites 5, 9 and 15. Journal of Nannoplankton Research. 29(1): 39-65. gs O


Duocameratus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 25-5-2024

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Short stable page link: Go to to create a permanent copy of this page - citation notes

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