Nannotax3 - ntax_cenozoic - Prinsius bisulcus Nannotax3 - ntax_cenozoic - Prinsius bisulcus

Prinsius bisulcus

Classification: ntax_cenozoic -> Isochrysidales -> Prinsiaceae -> Prinsius -> Prinsius bisulcus
Sister taxa: P. dimorphosus, P. martinii, P. bisulcus, P. sp.


Citation: Prinsius bisulcus (Stradner, 1963) Hay & Mohler, 1967
taxonomic rank: Species
Basionym: Coccolithus bisulcus Stradner, in Gohrbandt 1963
Taxonomic discussion: Similar to Prinsius martini but larger (>5µm according to Wei & Liu, 1992 but shifted to 5.5µm by Bown 2016). Type material length: 4-6.5µm.

Distinguishing features:
Parent taxon (Prinsius): Small to medium size (3-6 µm), elliptical, central areas narrow, closed or with slit-like opening
This taxon: 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 + *


Medium sized, elliptical placoliths with conspicuous tube cycle and closed centre. Two ‘grooves’ may be conspicuous along the longitudinal axis.

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:
LITHS: placolith, elliptical, CA: ca_conjunct, closed,
CSPH: equant, monomorphic, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Lith size: 5.5->7µm;
The morphological data given here can be used on the advanced search page. See also these notes

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 O

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

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 O

Perch-Nielsen, K. (1979). Calcareous nannofossil zonation at the Cretaceous/Tertiary boundary in Denmark. In, Birkelund, T. & Bromley, R. G. (eds) Proceedings Cretaceous-Tertiary Boundary Events Symposium, Copenhagen, 1. Copenhagen 115-135. 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 427-555. 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

Romein, A. J. T. (1979). Lineages in Early Paleogene calcareous nannoplankton. Utrecht Micropaleontological Bulletin. 22: 1-231. gs O

Self-Trail, J. M., Powars, D. S., Watkins, D. K. & Wandless, G. A. (2012). Calcareous nannofossil assemblage changes across the Paleocene–Eocene Thermal Maximum: Evidence from a shelf setting. Marine Micropaleontology. 92–93: 61-80. gs

Self-Trail, J. M., Parker, M., Govoni, D. L., Bybell, L. M., Gardner, K. F. & Gohn, G. S. (2023). Designation of a composite-stratotype section for the lower Paleocene (Danian) Brightseat Formation in Prince George’s County, Maryland, USA. Stratigraphy. 20(4): 237-258. gs

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

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 O


Prinsius bisulcus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-7-2024

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Comments (2)

Juan P. Pérez Panera(Argentina)

The correct name shouldn´t be: Prinsius bisulcus (Stradner in Gohrbandt, 1963) Hay and Mohler, 1967. ?

Jeremy Young(UK)

very true - well both are correct: Prinsius bisulcus (Stradner in Gohrbandt, 1963) Hay and Mohler, 1967 or Prinsius bisulcus (Stradner 1963) Hay and Mohler, 1967

but it is more useful to include the in Gohrbandt information and that is our standard practice on nannotax, so I will add that.

thanks Jeremy