Similiscutum cruciulus

Distinguishing features: Small, broadly elliptical, biscutacean placolith with narrow central area spanned by a small axial cross.

Taxonomy:

Farinacci & Howe catalog pages: Similiscutum cruciulus *

Distinguishing features: Small, broadly elliptical, biscutacean placolith with narrow central area spanned by a small axial cross.

Geological Range:
Last occurrence (top): in lower part of NJT7a subzone (20% up, 180Ma, in Toarcian stage). Data source: Mattioli & Erba 1999
First occurrence (base): at base of NJ4a subzone (0% up, 190.2Ma, in Pliensbachian stage). Data source: Bown & Cooper 1998 (fig 4) - zonal event

Plot of occurrence data:

(NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Similiscutum

References:

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

de Kaenel, E. & Bergen, J. A. (1993). New Early and Middle Jurassic coccolith taxa and biostratigraphy from the eastern proto-Atlantic (Morocco, Portugal and DSDP Site 547B). Eclogae Geologicae Helvetiae. 86(861-907): -. gs

Mattioli, E. & Erba, E. (1999). Synthesis of calcareous nannofossil events in Tethyan lower and middle Jurassic successions. Rivista Italiana di Paleontologia e Stratigrafia. 105(3): 343-376. gs

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Similiscutum cruciulus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 17-9-2019 Taxon Search: Advanced Search Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=11086 Go to Archive.is to create a permanent copy of this page - citation notes

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