Nannotax3 - ntax_main - Prinsius Nannotax3 - ntax_main - Prinsius

Prinsius


Classification: ntax_main -> Isochrysidales -> Prinsiaceae -> Prinsius
Sister taxa: Futyania, Praeprinsius, Prinsius, Toweius ⟩⟨ Neobiscutum

Daughter taxa (time control age-window is: 0-800Ma)
Prinsius dimorphosus
Very small, elliptical to subcircular placoliths with narrow to closed central area.
Prinsius martinii
Small (<5.5µm), elliptical placoliths with conspicuous tube cycle and closed centre.
Prinsius bisulcus
Medium sized, elliptical placoliths with conspicuous tube cycle and closed centre. Two ‘grooves’ may be conspicuous along the longitudinal axis.
Prinsius sp.
Specimens which cannot be assigned to any established species

Taxonomy:
Citation: Prinsius Hay & Mohler, 1967
Taxonomic rank: genus
Type species: Prinsius bisulcus (Stradner, 1963) Hay & Mohler, 1967 [Coccolithus]
Synonyms:
Taxonomic discussion: A number of different early, small species have been described (P. africanus, P. tenuiculus, P. rosenkrantzii), but usage can be inconsistent. Some authors group these smaller, early representatives within the separate genus Praeprinsius (Varol & Jakubowski, 1989).

Distinguishing features:
Parent taxon (Prinsiaceae): Placoliths with R-units forming the lower layer of proximal shield, inner tube and middle tube; V-units forming an upper layer to the proximal shield, outermost tube and the distal shield. In LM they display a dark outer cycle and brighter inner cycle. Central-area structures are conjunct, formed from the R-units.
This taxon: Small to medium size (3-6 µm), elliptical, central areas narrow, closed or with slit-like opening

Farinacci & Howe catalog pages:
Prinsius + * , Trachylithos *

Most likely ancestor:
Praeprinsius - at confidence level 5 (out of 5). Data source: Bown et al. 2023, fig.8.
Likely descendants: Toweius; plot with descendants

Search data:
LITHS: placolith, circular, elliptical, CA: ca_conjunct, vacant, closed,
CSPH: equant, CROSS-POLARS: rim-bicyclic, V-prominent, R-prominent,
Lith size: 2->7µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): at top of NP9 zone (100% up, 55.9Ma, in Ypresian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within NP2 zone (64.81-65.47Ma, base in Danian stage). Data source: Total of ranges of species in this database

Plot of occurrence data:

References:

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

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

Varol, O. & Jakubowski, M. (1989). Some new nannofossil taxa. INA Newsletter. 11(1): 24-29. gs


nannotaxlogo400px

Prinsius compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-6-2026

Taxon Search:
Advanced Search

Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=1119 Go to Archive.is to create a permanent copy of this page - citation notes



Add Comment

* Required information
Captcha Image

Comments

No comments yet. Be the first!