Hughesius tasmaniae

Classification: ntax_cenozoic -> Coccolithales -> Coccolithaceae -> Hughesius -> Hughesius tasmaniae
Sister taxa: H. gizoensis, H. tasmaniae, H. youngii, H. sp.


Citation: Hughesius tasmaniae (Edwards and Perch-Nielsen, 1975) de Kaenel and Villa, 1996
Rank: Species
Basionym: Ericsonia tasmaniae Edwards and Perch-Nielsen, 1975
Synonyms: Recorded as Hughesius sp. by Varol, 1989.
Clausibella tasmaniae (Edwards and Perch-Nielsen 1975) Aubry in Aubry & Bord 2009 - the genus Clausibellus was proposed for species without a proment distal shield cycle but with a two-layered proximal shield.
Taxonomic discussion: This species is intermediate between Clausicoccus fenestratus and Hughesius gizoensis, in terms of size, number of plates, and rim birefringence. It probably forms part of an evolutionary lineage between these species.

Distinguishing features: Small-sized species of Hughesius (3-5µm long), with 4 plates in central-area.

Farinacci & Howe catalog pages: E. tasmaniae * , [no catalog entry yet]

Search data:
TagsLITHS: placolith, elliptical, CA: ca_disjunct, grill, pores, closed,
CSPH: equant, monomorphic, CROSS-POLARS: rim-unicyclic, V-prominent, R-prominent,
MetricsLith size: 3->5µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: Rare above NN3
Last occurrence (top): within NN9 zone (9.53-10.55Ma, top in Tortonian stage). Data source: Young 1998
First occurrence (base): within Oligocene Epoch (23.03-33.89Ma, base in Rupelian stage). Data source: [JRY rough estimate]

Plot of occurrence data:


Aubry, M. -P. & Bord, D. (2009). Reshuffling the cards in the photic zone at the Eocene/Oligocene boundary. In, Koeberl, C. & Montanari, A. (eds) The Late Eocene Earth—Hothouse, Icehouse, and Impacts. Geological Society of America, Special Papers. 452: 279-301. gs

Bown, P. R. & Dunkley Jones, T. (2012). Calcareous nannofossils from the Paleogene equatorial Pacific (IODP Expedition 320 Sites U1331-1334). Journal of Nannoplankton Research. 32(2): 3-51. gs V O

Bown, P. R. & Newsam, C. (2017). Calcareous nannofossils from the Eocene North Atlantic Ocean (IODP Expedition 342 Sites U1403–1411). Journal of Nannoplankton Research. 37(1): 25-60. gs V O

de Kaenel, E. & Villa, G. (1996). Oligocene-Miocene calcareous nannofossil biostratigraphy and paleoeecology from the Iberian Abyssal Plain. Proceedings of the Ocean Drilling Program, Scientific Results. 149: 79-145. gs V O

Edwards, A. R. & Perch-Nielsen, K. (1975). Calcareous nannofossils from the southern Southwest Pacific, Deep Sea Drilling Project, Leg 29. Initial Reports of the Deep Sea Drilling Project. 29: 469-539. gs V O

Varol, O. (1989a). Calcareous nannofossil study of the central and western Solomon Islands. Circum-Pacific Council for Energy and Mineral Resources Earth Sciences. 239-268. gs V O

Young, J. R. (1998). Neogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 225-265. gs V O


Hughesius tasmaniae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-2-2021

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