Similiscutum novum


Classification: Mesozoic -> Podorhabdales -> Biscutaceae -> Similiscutum -> Similiscutum novum
Sister taxa: S. avitum, S. cruciulus, S. finchii, S. novum, S. orbiculus, S. precarium, S. sp.,

Distinguishing features: Broadly elliptical Similiscutum with very narrow central area closed by a spine bearing plate. Dark, unicyclic image in XPL with strongly striate shields.


Taxonomy:

Citation: Similiscutum novum (Goy in Goy et al., 1979) Mattioli et al 2004
Rank: Species
Basionym: Palaeopontosphaera nova Goy in Goy et al., 1979
Synonyms:
  • Discorhabdus novus (Goy 1979) de Kaenel & Bergen 1993
  • Biscutum novum (Goy in Goy et al., 1979) Bown, 1987

Farinacci & Howe catalog pages: Palaeopontosphaera nova *

Distinguishing features: Broadly elliptical Similiscutum with very narrow central area closed by a spine bearing plate. Dark, unicyclic image in XPL with strongly striate shields.

Geological Range:
Last occurrence (top): within Late Bathonian Substage (166.07-166.49Ma, top in Bathonian stage). Data source: Bown & Cooper 1998
First occurrence (base): within Pliensbachian Stage (182.70-190.82Ma, base in Pliensbachian stage). Data source: Bown & Cooper 1998

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

    Bown, P. R. (1987a). Taxonomy, evolution, and biostratigraphy of Late Triassic-Early Jurassic calcareous nannofossils. Special Papers in Palaeontology. 38: 118-. gs

    Bown, P. R. (1987b). The structural development of Early Mesozoic coccoliths and its evolutionary and taxonomic significance. Abhandlungen der Geologischen Bundesanstalt. 39: 33-49. gs

    Bown, P. R., Cooper, M. K. E. & Lord, A. R. (1988). A calcareous nannofossil biozonation scheme for the early to mid Mesozoic. Newsletters on Stratigraphy. 20: 91-114. 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

    Goy, G., Noël, D. & Busson, G. (1979). Les conditions de sédimentation des schistes-carton (Toarcien inf.) du bassin de Paris déduites de l'étude des nannofossiles calcaires et des diagraphies. Documents de Géologie de la Faculté des Sciences de Lyon. 75: 33-57. gs

    Mattioli, E., Pittet, B., Young, J. R. & Bown, P. R. (2004). Biometric analysis of Pliensbachian-Toarcian (Lower Jurassic) coccoliths of the family Biscutaceae: intra- and interspecific variability versus palaeoenvironmental influence. Marine Micropaleontology. 52: 5-27. gs

    Menini, A., Mattioli, E., Spangenberg, J. E., Pittet, B. & Suan, G. (2018). New calcareous nannofossil and carbon isotope data for the Pliensbachian/Toarcian boundary (Early Jurassic) in the western Tethys and their paleoenvironmental implications. Newsletters on Stratigraphy. -. gs

    Prins, B. (1969). Evolution and stratigraphy of cocolithinids from the Lower and Middle Lias. In, Bronnimann, P. & Renz, H. H. (eds) Proceedings of the First International conference on Planktonic Microfossils, Geneva 1967. E. J. Brill, Leiden 547-558. gs


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    Similiscutum novum compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-12-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10089 Go to Archive.is to create a permanent copy of this page - citation notes



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