Rhagodiscus pseudoangustus


Classification: Mesozoic -> Eiffellithales -> Rhagodiscaceae -> Rhagodiscus -> Rhagodiscus pseudoangustus
Sister taxa: R. achlyostaurion, R. adinfinitus, R. amplus, R. angustus, R. asper, R. cepekii, R. dekaenelii, R. eboracensis, R. gallagheri, R. hamptonii, R. indistinctus, R. infinitus, R. nebulosus, R. pancostii, R. plebeius, R. pseudoangustus, R. reniformis, R. robustus, R. sageri, R. splendens, R. sp.,

Distinguishing features: Sub-rectangular murolith coccoliths with parallel sides, rounded ends and a narrow central area spanned by a large hollow spine base. The rim may be irregularly thickened. Often seen in side view.


Taxonomy:

Citation: Rhagodiscus pseudoangustus Crux, 1987
Rank: Species
Synonyms: ?Zeugrhabdotus pseudoangustus Bralower et al. 1987. Bizarrely the same species was independently described with the same name by two sets of authors at the same time, the decoration of Crux (1987) was published one month earlier than that of Brlaower et al. and so has priority - see de Kaenel & Bergen (1996) Parhabdolithus pseudoangustus;

Farinacci & Howe catalog pages: Rhagodiscus pseudoangustus * , Zeugrhabdotus pseudoangustus *

Distinguishing features: Sub-rectangular murolith coccoliths with parallel sides, rounded ends and a narrow central area spanned by a large hollow spine base. The rim may be irregularly thickened. Often seen in side view.

Geological Range:
Last occurrence (top): at top of BC13 zone (100% up, 129.8Ma, in Barremian stage). Data source: Bown et al. 1998 - zonal marker
First occurrence (base): within Hauterivian Stage (130.77-133.88Ma, base in Hauterivian stage). Data source: Bown et al. 1998

Plot of occurrence data:

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Rhagodiscus pseudoangustus, synonyms included - Parhabdolithus pseudoangustus; Rhagodiscus pseudoangustus; Zeugrhabdotus pseudoangustus;
  • space-time plot :: Samples map :: Parent: Rhagodiscus

    References:

    Applegate, J. L. & Bergen, J. A. (1988). Cretaceous calcareous nannofossil biostratigraphy of sediments recovered from the Galicia Margin, ODP Leg 103. Proceedings of the Ocean Drilling Program. Scientific Results. 103: 293-348. gs

    Bown, P. R. (2005c). Early to Mid-Cretaceous Calcareous Nannoplankton from the Northwest Pacific Ocean, Leg 198, Shatsky Rise. Proceedings of the Ocean Drilling Program. Scientific Results. 198: 1-82. gs

    Bown, P. R., Rutledge, D. C., Crux, J. A. & Gallagher, L. T. (1998). Early Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 86-131. gs

    Bralower, T. J., Applegate, J. L., Covington, J. M. & Wise, S. W. (1987). Calcareous nannofossil biostratigraphy of a Lower Cretaceous deep-sea fan complex: Deep Sea Drilling Project Leg 93 site 603, lower continental rise off Cape Hatteras. Initial Reports of the Deep Sea Drilling Project. 93: 617-660. gs

    Covington, J. M. & Wise, S. W. (1987). Calcareous nannofossil biostratigraphy of a Lower Cretaceous deep-sea fan complex: Deep Sea Drilling Project Leg 93 Site 603, lower continental rise off Cape Hatteras. Initial Reports of the Deep Sea Drilling Project. 93: 617-660. gs

    Crux, J. A. (1987c). Six new species of calcareous nannofossils from the Lower Cretaceous strata of England and Germany. INA Newsletter. 9: 30-35. gs

    de Kaenel, E. & Bergen, J. A. (1996). Mesozoic calcareous nannofossil biostratigraphy from sites 897, 899, and 901, Iberia Abyssal Plain: New biostratigraphic evidence. Proceedings of the Ocean Drilling Program. Scientific Results. 149: 27-59. gs


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    Rhagodiscus pseudoangustus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 14-11-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=11028 Go to Archive.is to create a permanent copy of this page - citation notes



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