Nannotax3 - ntax_mesozoic - Palaeomicula maltica

Palaeomicula maltica


Classification: ntax_mesozoic -> Braarudosphaerales -> Polycyclolithaceae -> Palaeomicula -> Palaeomicula maltica
Sister taxa: P. jacovidesii, P. maltica, P. quadrisphena

Distinguishing features:
Parent taxon (Palaeomicula): Nannolith formed of four blocks, nannolith shape is approx square with diagonal sutures, elements show tangential crystallographic orientations
This taxon: Almost square, sutures run to corners of nannolith, elements wedge-shaped and outline notched


Taxonomy:

Citation: Palaeomicula maltica (Worsley 1971) Varol & Jakubowski 1989
Rank: Species
Basionym: Tetralithus malticus Worsley 1971

Farinacci & Howe catalog pages: T. malticus *

Distinguishing features:
Parent taxon (Palaeomicula): Nannolith formed of four blocks, nannolith shape is approx square with diagonal sutures, elements show tangential crystallographic orientations
This taxon: Almost square, sutures run to corners of nannolith, elements wedge-shaped and outline notched


Morphology:

In side view lozenge shaped and formed of two-layers - see mobile mount images of Varol & Bowman (2019)

Size:

Search data:
TagsLITHS: nannolith-radiate, quadrate, CA: closed, CROSS-POLARS: T-prominent,
MetricsLith size: 3->5µm; Segments: 4->4;
Data source notes: original description & illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Hauterivian Stage (130.77-133.88Ma, top in Hauterivian stage). Data source: Varol & Jakubowski 1989
First occurrence (base): within Kimmeridgian Stage (152.06-157.25Ma, base in Kimmeridgian stage). Data source: Varol & Jakubowski 1989

Plot of occurrence data:

References:

Varol, O. & Bowman, A. R. (2019). Taxonomic revision of selected Late Jurassic (Tithonian) calcareous nannofossils and the application of mobile mounting. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 291: 65-87. gs

Varol, O. & Jakubowski, M. (1989). Some new nannofossil taxa. INA Newsletter. 11: 24-29. gs V O

Varol, O. (1992b). Taxonomic revision of the Polycyclolithaceae and its contribution to Cretaceous biostratigraphy. Newsletters on Stratigraphy. 27(93-127): -. gs

Worsley, T. R. (1971). Calcareous nannofossil zonation of Upper Jurassic and Lower Cretaceous sediments from the Western Atlantic. In, Farinacci, A. (ed.) Proceedings of the Second Planktonic Conference Roma 1970. Edizioni Tecnoscienza, Rome 2: 1301-1321. gs


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Palaeomicula maltica compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 29-5-2022

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10849 Go to Archive.is to create a permanent copy of this page - citation notes



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