Nannotax3 - ntax_cenozoic - Pileolosphaera longistirpes

Pileolosphaera longistirpes

Classification: ntax_cenozoic -> Nannolith families inc sed -> Nannolith genera inc sed -> Pileolosphaera -> Pileolosphaera longistirpes
Sister taxa: P. longistirpes

Meier et al 2014 4-3.jpg
Meier et al 2014 4-2.jpg
Meier et al 2014 4-1.jpg
Meier et al 2014 5.jpg
Meier et al 2014 4-4.jpg

Taxonomy:

Citation: Pileolosphaera longistirpes Meier, Kinkel & Young 2014

Rank: Species

Taxonomic discussion: In the original publication owing to typesetting errors the name appeared in some places as P. longistripes, the correct orthography is P. longistirpes.

Distinguishing features: Nannoliths trilobate, formed of three petal-like elements and a central process.

Farinacci & Howe catalog pages: P. longistirpes *

Morphology: The elements are curved and so do not look like typical coccoliths, they are however formed of calcite as established by both chemical analysis and LM observations (Meier et al. 2014). The calcite c-axes are sub-vertical relative to the plates, and so the coccosphere shows radial c-axes (and is readily visible in LM)..

Size: Cell diameter 3.7-4.5 µm, lith diameter 3 to 3.8 µm.

Ecology & Biogeography: Appears to be confined to shelf seas, has been in seen in the Baltic Sea, North Sea and Irish Sea (Meier et al. 2014) also in the Bay of Biscay (Beaufort pers. comm.) and off Japan (Hagino pers. comm.)

Phylogenetic relations: No extant coccolithophores are obvious candidates for an evolutionary relationship with P. longistirpes and it does not show the characteristic rim/central area division of heterococcoliths. Hence it is regarded here as a nannolith of uncertain affinities. An intriguing possibility is that it might be related to Discoaster (Meier et al. 2014).

Search data:

Tags	LITHS: planolith, circular, CA: process, CSPH: equant, monomorphic, CROSS-POLARS: 1ou, V-prominent,
Metrics	Lith size: 3->4µm; Segments: 3->3; Coccosphere size: 3.5->4.5µm; Liths per sphere: 6->8 Data source notes: lith size from OD

The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: The individual nannoliths are almost invisible in LM since they have sub-vertical c-axes hence it will be difficult to establish the fossil record.
Last occurrence (top): Extant Data source: present in the plankton (Meier et al. 2014)
First occurrence (base): within No known fossil record modern (0.00-0.00Ma, base in "Holocene" stage). Data source: no fossil records

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: Pileolosphaera

References:

Meier, K. J. S., Kinkel, H. & Young, J. R. (2014b). A note on calcareous nannoplankton from the Kieler Förde (Baltic Sea). Journal of Nannoplankton Research. 33(1): 29-37. gs V O

Pileolosphaera longistirpes compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-3-2021

Taxon Search:

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1051 Go to Archive.is to create a permanent copy of this page - citation notes

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