Distinguishing features: Solid, truncated-cone-shaped nannolith with rectangular cross-section constructed from minute, roughly equidimensional crystallites. Possibly a holococcolith.
| Daughter taxa: (blue => in age window 0-800Ma) | ||||
| | | | Solid, truncated-cone-shaped nannolith with rectangular cross-section constructed from minute, roughly equidimensional crystallites. Possibly a holococcolith. |
| Specimens not identified to species level | ||||
Taxonomy:
Farinacci & Howe catalog pages: Pseudoconus *
Distinguishing features: Solid, truncated-cone-shaped nannolith with rectangular cross-section constructed from minute, roughly equidimensional crystallites. Possibly a holococcolith.
Search data:| Tags | LITHS: holococcolith, quadrate, |
| Metrics | Lith size: 4->7µm; Sources: size range of included species |
Geological Range:
Last occurrence (top): in lower part of Callovian Stage (20% up, 165.6Ma, in Callovian stage). Data source: Total of range of species in this database
First occurrence (base): in upper part of Bajocian Stage (82% up, 168.6Ma, in Bajocian stage). Data source: Total of range of species in this database
Plot of occurrence data:
Bown, P. R. & Cooper, M. K. E. (1989b). New calcareous nannofssils from the Jurassic. Journal of Micropalaeontology. 8: 91-96. gs :: view :: open 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 :: :: References:
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Pseudoconus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-6-2020
Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10957 Go to Archive.is to create a permanent copy of this page - citation notes |