Nannotax3 - ntax_mesozoic - Lacunolithus-Bown Nannotax3 - ntax_mesozoic - Lacunolithus-Bown


Classification: ntax_mesozoic -> Holococcoliths -> Rarer genera -> Lacunolithus-Bown
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

Daughter taxa (time control age-window is: 0-800Ma)
Lacunolithus tholiformis


Citation: Lacunolithus Bown 1993
Rank: Genus
Type species: Lacunolithus tholiformis Bown, 1993
Taxonomic discussion: Lacunolithus Bown (1993) is a junior homonym of Lacunolithus Lyul'eva (1989) so either a replacement name is needed or the one described species should be recombined in another genus. [JRY]

Farinacci & Howe catalog pages: Lacunolithus-Bown *

Search data:
LITHS: holococcolith, elliptical, cylindrical, hollow, CA: vacant, process, closed, CROSS-POLARS: rim-unicyclic,
Lith size: 2->2.5µm;
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 Toarcian Stage (100% up, 174.2Ma, in Toarcian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Aalenian Stage (0% up, 174.2Ma, in Toarcian stage). Data source: Total of range of species in this database

Plot of occurrence data:


Bown, P. R. (1993). New holococcoliths from the Toarcian-Aalenian (Jurassic) of northern Germany. Senckenbergiana Lethaea. 73: 407-419. gs

Lyul'eva, S. A. (1989). New Miocene and Pliocene calcareous nannofossils of the Ukraine. Dopovidi Akad. Nauk Ukrainskoi RSR. 1: 10-14. gs


Lacunolithus-Bown compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 24-9-2023

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

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