Sub-taxa & variants (time control age-window is: 0-800Ma) | ||||
Hornibrookina edwardsii Variant of H. teuriensis with smaller central area |
Taxonomy:
Distinguishing features:
Parent taxon (Hornibrookina): Elliptical placoliths with bicyclic distal shields with raised tube cycle and central area grill formed from robust bars.
This taxon: Medium to large (5-10 µm) elliptical; central area with ~10 pairs of lateral bars, and a longitudinal bar, sometimes over-calcified; R units often form ring of nodes around central area
Farinacci & Howe catalog pages: H. teuriensis *
Size:
Ecology & Biogeography
LITHS: placolith, elliptical, CA: ca_disjunct, grill, CSPH: equant, monomorphic, CROSS-POLARS: V-prominent, R-prominent, rim-bicyclic, |
Lith size: 5->10µm; Data source notes: original diagnosis, Self-Trail et al 2022 |
Geological Range:
Notes: Varol, (1989, fig. 12.4) recorded a useful LAD in the middle of NP5.
according to Self-Trail et al. 2022 the FAD of H. teuriensis (sensu stricto) with a wide central area is in NP3 whist only variants with a small central area (H. edwardsii) occur in NP2.
Last occurrence (top): in mid part of NP8 zone (50% up, 58Ma, in Thanetian stage). Data source: Self-Trail et al. 2022
First occurrence (base): within NP1 zone (65.47-66.04Ma, base in Danian stage). Data source: Perch-Nielsen 1985
Plot of occurrence data:
Arney, J. E. & Wise, S. W. (2003). Paleocene–Eocene nannofossil biostratigraphy of ODP Leg 183, Kerguelen Plateau. Proceedings of the Ocean Drilling Program, Scientific Results. 183: 1-59. gs Bown, P. R., Kim, H. & Gibbs, S. J. (2023). Danian calcareous nannofossil evolution and taxonomy with focus on sites from the North Atlantic Ocean (IODP Expedition 342, Sites U1403 and U1407). Journal of Nannoplankton Research. 41(2): 110-157. gs O Edwards, A. R. (1973b). Key species of New Zealand calcareous nannofossils. New Zealand Journal of Geology and Geophysics. 16: 68-89. gs Perch-Nielsen, K. (1977). Albian to Pleistocene calcareous nannofossils from the Western South Atlantic, DSDP Leg 39. Initial Reports of the Deep Sea Drilling Project. 39: 699-823. gs O Perch-Nielsen, K. (1985). Cenozoic calcareous nannofossils. In, Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge (1): 427-555. gs Pospichal, J. J. & Wise, S. W. (1990). Maestrichtian calcareous nannofossil biostratigraphy of Maud Rise ODP leg 113 sites 689 and 690, Weddell Sea. Proceedings of the Ocean Drilling Program, Scientific Results. 113: 465-487. gs Pospichal, J. J. & Wise, S. W. (1990). Paleocene to Middle Eocene calcareous nannofossils of ODP sites 689 and 690, Maud Rise, Weddell Sea. Proceedings of the Ocean Drilling Program, Scientific Results. 113: 613-638. gs Pospichal, J. J. (1996). High latitude calcareous nannofossil changes at the Cretaceous/Tertiary boundary in the southern Indian Ocean. In, Moguilevsky, A. & Whatley, R. (eds) Microfossils and Oceanic Environments. University of Wales, Aberystwyth-Press 205-229. gs Self-Trail, J. M., Watkins, D. K., Pospichal, J. J. & Seefelt, E. L. (2022). Evolution and taxonomy of the Paleogene calcareous nannofossil genus Hornibrookina. Micropaleontology. 68(1): 85-113. gs Varol, O. (1989c). Palaeocene calcareous nannofossil biostratigraphy. 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 . 265-310. gs References:
Hornibrookina teuriensis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 14-12-2024
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