Nannotax3 - ntax_mesozoic - Hayesites irregularis

Hayesites irregularis


Classification: ntax_mesozoic -> Nannoliths inc sedis -> Nannoliths inc sed - radiate multielement -> Hayesites -> Hayesites irregularis
Sister taxa: H. albiensis, H. irregularis, H. sp.

Distinguishing features:
Parent taxon (Hayesites): Stellate nannoliths with 6-11 imbricate rays. Small subsidiary cycles and spines may be present.
This taxon: Small compact nannolith with 9-11 short free rays of variable size. The ouline is typically irregular.


Sub-taxa & variants (time control age-window is: 0-800Ma)
Hayesites irregularis early form - elongated

Hayesites irregularis later form - subcircular

Taxonomy:

Citation: Hayesites irregularis (Thierstein in Roth & Thierstein, 1972) Applegate et al. in Covington & Wise, 1987
Rank: Species
Basionym: Rucinolithus irregularis Thierstein in Roth & Thierstein, 1972
Variants: Aguado et al. (2022) showed that early froms, in the topmost Barremian, are elliptical and smaller than the later typical circular forms.  

Farinacci & Howe catalog pages: R. irregularis *

Distinguishing features:
Parent taxon (Hayesites): Stellate nannoliths with 6-11 imbricate rays. Small subsidiary cycles and spines may be present.
This taxon: Small compact nannolith with 9-11 short free rays of variable size. The ouline is typically irregular.


Morphology:


Size:

Search data:
LITHS: nannolith-radiate, circular, star-shaped, CROSS-POLARS: R-prominent,
Lith size: 4->7µm; Segments: 9->11;
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 Late Albian Substage (100.50-107.59Ma, top in Albian stage). Data source: Bown et al. 1998
First occurrence (base): at base of NC6a subzone (0% up, 126.4Ma, in Barremian stage). Data source: Bown et al. 1998, fig. 5.2

Plot of occurrence data:

References:

Aguado, R., Company, M., O'Dogherty, L., Sandoval, J. & Martinez, M. (2022). New insights into the Barremian–lower Aptian calcareous nannofossils of the Mediterranean Tethys: Chronostratigraphic and paleobiogeographic implications. Marine Micropaleontology. 173: 1-24. gs V O

Applegate, J. L. & Bergen, J. A. (1988). Cretaceous calcareous nannofossil biostratigraphy of sediments recovered from the Galicia Margin, ODP Leg 103. Proceedings of the Ocean Drilling Program, Scientific Results. 103: 293-348. gs O

Bown, P. R. (2005c). Early to Mid-Cretaceous Calcareous Nannoplankton from the Northwest Pacific Ocean, Leg 198, Shatsky Rise. Proceedings of the Ocean Drilling Program, Scientific Results. 198: 1-82. gs O

Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Lower Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 86-131. gs O

Bralower, T. J., Monechi, S. & Thierstein, H. R. (1989). Calcareous nannofossil zonation of the Jurassic-Cretaceous boundary interval and correlation with the geomagnetic polarity timescale. Marine Micropaleontology. 14: 153-235. gs

Covington, J. M. & Wise, S. W. (1987). Calcareous nannofossil biostratigraphy of a Lower Cretaceous deep-sea fan complex: Deep Sea Drilling Project Leg 93 Site 603, lower continental rise off Cape Hatteras. Initial Reports of the Deep Sea Drilling Project. 93: 617-660. gs O

Jeremiah, J. (2001). A Lower Cretaceous nannofossil zonation for the North Sea Basin. Journal of Micropalaeontology. 20(1): 45-80. gs V O

Kanungo, S., Bown, P. R. & Gale, A. S. (2020). Cretaceous (Albian-Turonian) calcareous nannofossil biostratigraphy of the onshore Cauvery Basin, southeastern India. Cretaceous Research. 118 [2021]: 1-22. gs

Mutterlose, J. (1992b). Lower Cretaceous nannofossil biostratigraphy off northwestern Australia (Leg 123). Proceedings of the Ocean Drilling Program, Scientific Results. 123: 343-368. gs V O

Roth, P. H. & Thierstein, H. R. (1972). Calcareous nannoplankton: Leg 14 of the Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. 12: 546-559. gs O


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Hayesites irregularis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 7-10-2022

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Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10497 Go to Archive.is to create a permanent copy of this page - citation notes



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