Distinguishing features:
Parent taxon (Schizosphaerellaceae): Large globular test with two interlocking sub-hemispherical valves formed from a geometric arrangement of equidimensional crystallites.
This taxon: Large globular test with two interlocking sub-hemispherical valves formed from a geometric arrangement of equidimensional crystallites.
Daughter taxa (time control age-window is: 0-800Ma) | ||||
Schizosphaerella punctulata Large globular test with two interlocking sub-hemispherical valves formed from a geometric arrangement of equidimensional crystallites. | ||||
Schizosphaerella sp. Specimens not identified to species level |
Taxonomy:
Farinacci & Howe catalog pages: Schizosphaerella * , Nannopatina * , Nipterula *
Distinguishing features:
Parent taxon (Schizosphaerellaceae): Large globular test with two interlocking sub-hemispherical valves formed from a geometric arrangement of equidimensional crystallites.
This taxon: Large globular test with two interlocking sub-hemispherical valves formed from a geometric arrangement of equidimensional crystallites.
Search data:
LITHS: nannolith-other, circular, hollow, |
Lith size: 8->12µm; Data source notes: size range of included species |
Geological Range:
Last occurrence (top): at top of Kimmeridgian Stage (100% up, 149.2Ma, in Tithonian stage). Data source: Total of ranges of the species in this database
First occurrence (base): within NJ1 zone (199.66-201.26Ma, base in Hettangian 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 Deflandre, G. & Dangeard, L. (1938). Schizosphaerella, un nouveau microfossile méconnu du Jurassique moyen et supérieur. Comptes rendus hebdomaire de l'Académie des sciences, Paris. 207: 1115-1117. gs References:
Schizosphaerella compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 13-1-2025
Short stable page link: https://mikrotax.org/Nannotax3/index.php?id=11069 Go to Archive.is to create a permanent copy of this page - citation notes |
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