Nannotax3 - ntax_cenozoic - Umbilicosphaera hulburtiana

Citation: Umbilicosphaera hulburtiana Gaarder, 1970

Synonyms: Ellipsoplacolithus latifolius Kamptner 1963 (invalid, as the genus had not been validly published - ICN Art 35.1 = ICBN Art 43.1 ) [description based on isolated distal shield - JRY 2015]

Taxonomic discussion: U. hulburtiana as originally described also included U. anulus.

Distinguishing features:
Parent taxon (Umbilicosphaera): Central area open
This taxon: Coccoliths elliptical, otherwise similar to U. foliosa

Elliptical, otherwise similar to U. foliosa, including bicyclic proximal shield, rare.

See also: Oolithotus fragilis - in the LM coccospheres of U. hulburtiana can be confused with those of O. antillarum;

Geological Range:
Notes: Questions whether range begins with NN19
Last occurrence (top): Extant. Data source: present in the plankton (Young et al. 2003)
First occurrence (base): within NN19 zone (0.44-1.93Ma, base in Gelasian stage). Data source: Young 1998

References:

Andruleit, H., Rogalla, U. & Staeger, S. (2005). Living coccolithophores recorded during the onset of upwelling conditions off Oman in the western Arabian Sea. Journal of Nannoplankton Research. 27(1): 1-14. gs

Cros, L. & Fortuño, J. -M. (2002). Atlas of northwestern Mediterranean coccolithophores. Scientia Marina. 66: 1-186. gs

Gaarder, K. R. (1970). Three new taxa of Coccolithineae. Nytt Magasin for Botanikk. 17(2): 113-126. gs O

Kamptner, E. (1963). Coccolithineen-Skelettreste aus Tiefseeablagerungen des Pazifischen Ozeans. Annalen des Naturhistorischen Museums in Wien. 66: 139-204. gs O

Konno, S. & Jordan, R. W. (2006). Lagoon coccolithophorids from the Republic of Palau, NW Equatorial Pacific. Journal of Nannoplankton Research. 28(2): 95-110. gs O

Malinverno, E., Leoni , B. & Galli, P. (2022). Coccolithophore assemblages and a new species of Alisphaera from the Faafu Atoll, Maldives, Indian Ocean. Marine Micropaleontology. 172(102110): 1-16. gs

Okada, H. & McIntyre, A. (1977). Modern coccolithophores of the Pacific and North Atlantic Oceans. Micropaleontology. 23(1): 1-55. gs

Yang, T. -N., Wei, K. & Wu, J. -T. (2012). Marine coccolithophores around Taiwan. Biodiversity Research Center, Academica Sinica, Taipei. 1-96. gs

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

Young, J. R., Geisen, M., Cros, L., Kleijne, A., Probert, I. & Ostergaard, J. B. (2003). A guide to extant coccolithophore taxonomy. Journal of Nannoplankton Research. S1: 1-132. gs

Umbilicosphaera hulburtiana

References:

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