Nannotax3 - ntax_main - Petasaria protruberans Nannotax3 - ntax_main - Petasaria protruberans

Petasaria protruberans


Classification: ntax_main -> other groups -> Haptophytes -> Prymnesiales -> Prymnesiaceae -> Petasaria -> Petasaria protruberans
Sister taxa: P. heterolepis, P. protruberans

Taxonomy:

Citation: Petasaria protruberans Jordan, Malinverno, Šupraha, Thomsen et Young
Taxonomic rank: species
Basionym: Petasaria protruberans Jordan, Malinverno, Šupraha, Thomsen et Young

Distinguishing features:
Parent taxon (Petasaria):
This taxon: Simlar to P. neolepis but with protruberance of variable length extending from rim of scales

Original description: Cell shape unknown, only collapsed cells observed. Cell cover composed of 20-30 circular to oval siliceous scales, 2.7-3.1 μm x 2.5-2.9 μm. Distal surface of scale perfo- rated, except for a centrally raised hyaline patch and deep rectangular or circular groove. All scales with a short to long protuberance (0.3-4.0 μm x 0.3-1.3 μm) extending from rim of hyaline area, terminating in three to five short finger-like structures. Proximal surface with raised hyaline structure (corresponding to groove on distal side, and of similar shape) possessing short projections directed towards hyaline area. Rim slightly curved towards proximal side, more prominent near hyaline area and along protuberance.

Type images:

Farinacci & Howe catalog pages: Petasaria protruberans


Morphology:

Cell shape unknown, only collapsed cells observed. Cell cover composed of 20-30 circular to oval siliceous scales, 2.7-3.1μm x 2.5-2.9μm. Distal surface of scale perforated, except for a centrally raised hyaline patch and deep rectangular or circular groove. All scales with a short to long protuberance (0.3-4.0μm x 0.3-1.3μm) extending from rim of hyaline area, terminating in three to five short finger-like structures. Proximal surface with raised hyaline structure (corresponding to groove on distal side, and of similar shape) possessing short projections directed towards hyaline area. Rim slightly curved towards proximal side, more prominent near hyaline area and along protuberance. [Jordan et al. 2016]

Search data:
Lith size: 0->0µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): Extant. Data source: present in the plankton
First occurrence (base): within no known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source: [JRY]

Plot of occurrence data:

References:

Jordan, R. W., et al. (2016). Observations on the morphological diversity and distribution of two siliceous nannoplankton genera, Hyalolithus and Petasaria. Micropaleontology. 61(6): 439-455. gs


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Petasaria protruberans compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 20-6-2025

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=20286 Go to Archive.is to create a permanent copy of this page - citation notes



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