Stephanolithion brevispinus


Classification: Mesozoic -> Stephanolithiales -> Stephanolithiaceae -> Stephanolithion -> Stephanolithion brevispinus
Sister taxa: S. atmetos, S. bigotii, S. brevispinus, S. hexum, S. speciosum, S. sp.,

Distinguishing features: Elliptical Stephanolithion with very short rim spines and central area spanned by diagonal cross bars.


Taxonomy:

Citation: Stephanolithion brevispinus (Wind & Wise in Wise, 1988) Bown in Bown & Cooper, 1998
Rank: Species
Basionym: Stephanolithion bigotii brevispinus Wind & Wise in Wise, 1988
Notes & discussion: Similar to Corollithion/Stradnerlithus/Stephanolithion helotatus (Wind and Wise in Wise and Wind, 1977) Cooper, 1987, depending on sense of use. See discussion in Bown & Cooper (1998, p.52).

Farinacci & Howe catalog pages: Stephanolithion bigotii brevispinus *

Distinguishing features: Elliptical Stephanolithion with very short rim spines and central area spanned by diagonal cross bars.

See also: Stradnerlithus helotatus - similar but without rim-spines;;

Geological Range:
Notes: Marker for base of NJ16a. In Bown et al. 1988 this event was labelled as FAD S. helotatus but following clarification of species concepts it was relabelled as FAD S. brevispinus in Bown & Cooper 1998
Last occurrence (top): within NJ17a subzone (149.09-151.50Ma, top in Tithonian stage). Data source: Bown & Cooper 1998
First occurrence (base): at base of NJ16a subzone (0% up, 152.3Ma, in Kimmeridgian 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: Stephanolithion

    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., 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

    Wise, S. W. (1983). Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 71 in the Falkland Plateau region, Southwest Atlantic Ocean. Initial Reports of the Deep Sea Drilling Project. 71: 481-550. gs

    Wise, S. W. (1988). Mesozoic-Cenozoic history of calcareous nannofossils in the region of the Southern Ocean. Palaeogeography Palaeoclimatology Palaeoecology. 67: 157-179. gs


    nannotaxlogo400px

    Stephanolithion brevispinus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-12-2019

    Taxon Search:
    Advanced Search

    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=11151 Go to Archive.is to create a permanent copy of this page - citation notes



    Comments (0)

    No comments yet. Be the first!

    Add Comment

    * Required information
    1000
    Captcha Image
    Powered by Commentics