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

Varol & Bowman 2019 pl10 fig01-4.jpg
Varol & Bowman 2019 pl10 fig05-8.jpg
Varol & Bowman 2019 pl10 fig09-12.jpg
Varol & Bowman 2019 pl10 fig13-14 +2.jpg
Varol1992pl7-20.JPG
Varol1992pl7-19.JPG

Taxonomy:

Citation: Palaeomicula maltica (Worsley 1971) Varol & Jakubowski 1989

Rank: Species

Basionym: Tetralithus malticus Worsley 1971

Farinacci & Howe catalog pages: T. malticus *

Morphology:

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

Size:

Search data:

LITHS: nannolith-radiate, quadrate, CA: closed, CROSS-POLARS: T-prominent,

Lith 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:

Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
(NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Palaeomicula

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 O

Palaeomicula maltica compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 30-9-2022

Taxon Search:

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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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