Polycostella senaria


Classification: ntax_mesozoic -> Braarudosphaerales -> Transitional genera -> Polycostella -> Polycostella senaria
Sister taxa: P. senaria, P. infans, P. beckmannii, P. parvistellatus, P. sp.

Distinguishing features: Medium-sized (5-8 µm) with 6 segments


Taxonomy:

Citation: Polycostella senaria Thierstein, 1971
Rank: Species
Synonyms:

Farinacci & Howe catalog pages: P. senaria * , N. erbae *

Distinguishing features: Medium-sized (5-8 µm) with 6 segments

Search data:
TagsLITHS: nannolith-radiate, star-shaped, cylindrical, polygonal, hollow, CA: closed, CROSS-POLARS: T-prominent,
MetricsLith size: 3->8µm; Segments: 6->6;
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 Early Berriasian Substage (143.57-145.01Ma, top in Berriasian stage). Data source: Bown & Cooper 1998
First occurrence (base): in lower part of NJ17b subzone (20% up, 148.9Ma, in Tithonian stage). Data source: Bown & Cooper 1998 (fig. 4) - secondary events

Plot of occurrence data:

References:

Bown, P. R. & Cooper, M. K. E. (1998). Jurassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 34-85. gs

Casellato, C. E. (2010). Calcareous nannofossil biostratigraphy of Upper Callovian - Lower Berriasian successions from the Souhern Alps, North Italy. Rivista Italiana di Paleontologia e Stratigrafia. 116(3): 357-404. gs V O

Thierstein, H. R. (1971). Tentative Lower Cretaceous Calcareous Nannoplankton Zonation. Eclogae Geologicae Helvetiae. 64: 459-488. gs V O

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


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Polycostella senaria compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-5-2021

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10925 Go to Archive.is to create a permanent copy of this page - citation notes



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