Daughter taxa (time control age-window is: 0-800Ma)![]() | Granddaughter taxa | ||||
| Faviconus Long, narrow columnar nannoliths formed from stacks of calcite laths around a narrow axial canal. May occur as linked groups of multiple columns. | |||||
| Nannoconus Conical, globular or cylindrical nannoliths composed of plates spirally-arranged around an axial cavity (~>1µm in width) or canal (~<1µm in width). Plate c-axes are arranged tangentially to the longitudinal axis. | N. steinmannii group N. kamptneri group N. abundans group N. truittii group N. circularis group N. compressus group Nannoconus - atypical Nannoconus sp. | ||||
Distinguishing features:
Parent taxon (Braarudosphaerales): 2N(?) cell covered by nannoliths with lamellar sub-structure and tangential C-axes. N: cell motile, covered by scales
This taxon: Conical, globular or cylindrical nannoliths composed of plates spirally-arranged around an axial cavity or canal. Plate c-axes are arranged tangentially to the longitudinal axis.
Farinacci & Howe catalog pages:
Nannoconaceae
| Lith size: 0->0µm; |
Geological Range:
Last occurrence (top): at top of Campanian Stage (100% up, 72.2Ma, in Campanian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within NJ15b subzone (149.47-156.78Ma, base in Oxfordian stage). Data source: Total of ranges of species in this database
Plot of occurrence data:
Bown, P. R. & Cooper, M. K. E. (1998). Jurassic. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 34-85. gs O Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series . 132-199. gs O Deflandre, G. (1959). Sur les nannofossiles calcaires et leur systématique. Revue de Micropaléontologie. 2: 127-152. gs van Niel, B. E. (1994a). A review of the terminology used to describe the genus Nannoconus (calcareous nannofossil, incertae sedis). Cahiers de Micropaléontologie. 9: 27-47. gs Young, J. R., et al. (1997). Guidelines for coccolith and calcareous nannofossil terminology. Palaeontology. 40: 875-912. gs Missing or ambiguous references: ; References:

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Nannoconaceae compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 12-4-2026
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=10717 Go to Archive.is to create a permanent copy of this page - citation notes |
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