Taxonomy:
Distinguishing features: Medium sized, elliptical placoliths with conspicuous tube cycle and closed centre. Two ‘grooves’ may be conspicuous along the longitudinal axis.
Farinacci & Howe catalog pages: C. bisulcus + *
Morphology: Medium sized, elliptical placoliths with conspicuous tube cycle and closed centre. Two ‘grooves’ may be conspicuous along the longitudinal axis.
Size: Type material length 4.0-6.5 microns.
Phylogenetic relations: Prinsius increases in size through the Palaeocene but with a marked shift in the Mid Palaeocene (base zone NP4) and the size separation at 5 µm was set to capture this change. Bimodal assemblages occur according to Wei & Liu (1992), suggesting that this may be cladogenetic event.
Most likely ancestor: Prinsius martinii - at confidence level 4 (out of 5). Data source: Romein 1979, Wei & Liu 1992.
Search data:Tags | LITHS: placolith, elliptical, CA: ca_conjunct, closed, CSPH: equant, monomorphic, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent, |
Metrics | Lith size: 5.5->7µm; |
Geological Range:
Notes: last occurrence is in lower part of NP9 [PRB 2016]
Last occurrence (top): within NP9 zone (55.86-57.21Ma, top in Ypresian stage). Data source: Perch-Nielsen 1985b
First occurrence (base): within NP4 zone (61.51-63.25Ma, base in Danian stage). Data source: Wei & Liu 1992
Plot of occurrence data:
Bown, P. R. (2016). Paleocene calcareous nannofossils from Tanzania (TDP sites 19, 27 and 38). Journal of Nannoplankton Research. 36(1): 1-32. gs V O Gohrbandt, K. (1963). Zur Gliederung des Palaogen im Helvetikum nordlich Salzburg nach planktonischen Foraminiferen. Mitteilungen der Geologischen Gesellschaft in Wien. 56: 1-116. gs Hay, W. W. & Mohler, H. P. (1967). Calcareous nannoplankton from Early Tertiary rocks at Point Labau, France and Paleocene-Early Eocene correlations. Journal of Paleontology. 41(6): 1505-1541. gs Okada, H. & Thierstein, H. R. (1979). Calcareous nannoplankton - Leg 43, Deep Sea Drilling Project. Initial Reports of the Deep Sea Drilling Project. 43: 507-573. gs V O Perch-Nielsen, K. (1985a). Cenozoic calcareous nannofossils. In, Bolli, H. M., Saunders, J. B. & Perch-Nielsen, K. (eds) Plankton Stratigraphy. Cambridge University Press, Cambridge 427-555. gs Pospichal, J. J. & Wise, S. W. (1990c). 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 V O Romein, A. J. T. (1979). Lineages in Early Paleogene calcareous nannoplankton. Utrecht Micropaleontological Bulletin. 22: 1-231. gs V O Wei, W. & Liu, L. (1992). Biometric and biochronologic study of the Prinsius martinii - P. bisulcus group. In, Hamrsmid, B. & Young, J. R. (eds) Nannoplankton Research, Proceedings of the 4th INA Conference, Prague 1991, vol II. Knihovnicka ZPN. 14b: 11-35. gs V O Wise, S. W. & Wind, F. H. (1977). Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 36 drilling on the Falkland Plateau, south-west Atlantic sector of the Southern Ocean. Initial Reports of the Deep Sea Drilling Project. 36(269-491): -. gs V OReferences:
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Prinsius bisulcus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 28-2-2021
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