Daughter taxa (time control age-window is: 0-800Ma)![]() | Granddaughter taxa | ||||
Emiliania No bridge, slits between distal shield elements | |||||
![]() | ![]() | Gephyrocapsa Bridge across the central area | Gephyrocapsa oceanica Gephyrocapsa muellerae Gephyrocapsa ornata Gephyrocapsa ericsonii Gephyrocapsa parvula Gephyrocapsa sp elevated bridge Gephyrocapsa caribbeanica Gephyrocapsa omega Gephyrocapsa lumina Gephyrocapsa small Gephyrocapsa florencia Gephyrocapsa sp. | ||
![]() | ![]() | Pseudoemiliania With slits between some of the distal shield elements | |||
![]() | ![]() | ![]() | Reticulofenestra No bridge, no slits | R. pseudoumbilicus group Reticulofenestra sessilis C. floridanus group R. bisecta group R. lockeri group R. reticulata group R. umbilicus group Reticulofenestra sp. | |
![]() | Noelaerhabdus With one large spine extending from inner tube | ||||
![]() | ![]() | ![]() | ![]() | Bekelithella With ring of short spines extending from inner tube | |
Pyrocyclus Spurious genus for reticulofenestrid coccoliths without shields |
Taxonomy:
Distinguishing features:
Parent taxon (Isochrysidales): 2N: Mostly placolith heterococcoliths with R-unit dominant. Non-motile
N: non-calcifying, motile, with vestigial haptonema.
This taxon: Heterococcoliths with Reticulofenestra-type structure, V-units vestigal, R-units forming grill, both shields, and two-layered tube
Original description: N. bozinovicae représente, à ma connaissance, le seul type de rhabdolithe comportant une embase à architecture en bouton de manchete qui soit eliptique. Par ailleurs la position excentrée de sa hampe en bordure de la dépression centrale du disque supérieur lui confère un autre trait d'originalité. Ces deux caractères, profondément différents de ceux actuellement connus chez les coccolithes fossiles ou vivants, me paraissent justifier la création d'une nouvelle famille: celle des Noelaerhabdaceae ayant pour genre type Noëlaerhabdus Jerk.
Farinacci & Howe catalog pages: Noelaerhabdaceae, Gephyrocapsaceae *
Morphology:
Biology & life-cycles
Lith size: 1->20µm; |
Geological Range:
Notes: The Noelaerhabdaceae dominate most Neogene nannofossil assemblages with the dominant genera being succesively Cyclicargolithus (NN1-6), Reticulofenestra (NN6-16), Pseudoemiliania (NN16-19), Gephyrocapsa (NN19-20) and Emiliania (NN21). The last occurrences of various larger forms provide excellent highly synchronous biostatigraphic events - particularly LO large R. pseudoumbilicus (end NN10A), LO R. pseudoumbilicus (end NN15), LO large Gephyrocapsa (NN19), LO P. pseudoemiliania (end NN19).
Last occurrence (top): Extant. Data source: Total of ranges of the species in this database
First occurrence (base): within NP9 zone (55.86-57.21Ma, base in Thanetian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Black, M. (1971c). The systematics of coccoliths in relation to the paleontological record. In, Funnell, B. M. & Riedel, W. R. (eds) The Micropaleontology of the Oceans. Cambridge University Press, Cambridge 611-624. gs O Frada, M., Probert, I., Allen, M. J., Wilson, W. H. & de Vargas, C. (2008). The “Cheshire Cat” escape strategy of the coccolithophore Emiliania huxleyi in response to viral infection. Proceedings of the National Academy of Sciences, USA. 105(41): 15944-15949. gs Gallagher, L. T. (1989). Reticulofenestra : A critical review of taxonomy, structure and evolution. In, Crux, J. A. & van Heck, S. E. (eds) Nannofossils and their applications: Proceedings of the 2nd INA Conference, London 1987. British Micropalaeontological Society Publication Series . 41-75. gs O Green, J. C., Course, P. A. & Tarran, G. A. (1996). The life-cycle of Emiliania huxleyi: A brief review and a study of relative ploidy levels analysed by flow cytometry. Journal of Marine Systems. 9: 33-44. gs Houdan, A. et al. (2004a). Flow cytometric analysis of relative ploidy levels in holococcolithophore-heterococcolithophore (Haptophyta) life cycles. Systematics and Biodiversity. 1(4): 453-465. gs Jerkovic, L. (1970). Noëlaerhabdus nov. gen. type d'un nouvelle famille de Coccolithophoridés fossiles: Noëlaerhabdaceae du Miocène supérieur de Yugoslavie. Comptes rendus hebdomaire de l'Académie des sciences, Paris. 270: 468-470. gs Klaveness, D. (1972). Coccolithus huxleyi (Lohmann) Kamptner. II. - The flagellate cell, aberrant cell types, vegetative propagation and life cycles. British Phycological Journal. 7: 309-318. gs Young, J. R. & Bown, P. R. (1997). Cenozoic calcareous nannoplankton classification. Journal of Nannoplankton Research. 19(1): 36-47. gs Young, J. R. (1989). Observations on heterococcolith rim structure and its relationship to developmental processes. In, Crux, J. A. & van Heck, S. E. (eds) Nannofossils and their applications: Proceedings of the 2nd INA Conference, London 1987. British Micropalaeontological Society Publication Series . 1-20. 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 Young, J. R., Henriksen, K. & Probert, I. (2004b). Structure and morphogenesis of the coccoliths of the CODENET species. In, Thierstein, H. R. & Young, J. R. (eds) Coccolithophores - From molecular processes to global impact. Springer, Berlin 191-216. gs OReferences:
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Noelaerhabdaceae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 8-2-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=943 Go to Archive.is to create a permanent copy of this page - citation notes |
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