Lithraphidites houghtonii


Classification: Mesozoic -> Nannoliths inc sedis -> Microrhabdulaceae -> Lithraphidites -> Lithraphidites houghtonii
Sister taxa: L. carniolensis, L. charactozorro, L. grossopectinatus, L. kennethii, L. praequadratus, L. quadratus, L. acutus, L. alatus, L. pseudoquadratus, L. bollii, L. houghtonii, L. moray-firthensis, L. sp.,

Distinguishing features: Lithraphidites species with a finely serrated blade. The blade may be quite broad but is generally broken to a more slender shape


Taxonomy:

Citation: Lithraphidites houghtonii Jeremiah 2001
Rank: Species
Notes & discussion: This species is similar to the later L. alatus. It is to clear from the original diagnosis how they are separated, but arguably L. houghtonii is broader and less regularly tapering.

Farinacci & Howe catalog pages: Lithraphidites houghtonii *

Distinguishing features: Lithraphidites species with a finely serrated blade. The blade may be quite broad but is generally broken to a more slender shape


Morphology remarks: The blade serrations are not are not as ordered or as coarse as in Lithraphidites moray-firthensis ( Jeremiah 2001).

Size: 9–12 _m long (mean 11 _m), 50 specimens measured. ( Jeremiah 2001)

Geological Range:
Notes: L. houghtonii has two acme occurrences within the Aptian of the North Sea. Its earliest quantitative incursion occurs within the lower part of the Ewaldi Marl (Valhall V6, Johnson & Lott, 1993) whilst a later incursion within the martinioides ammonite Zon
Last occurrence (top): within Aptian Stage (112.95-126.30Ma, top in Aptian stage). Data source: Bown et al. 1998
First occurrence (base): within Aptian Stage (112.95-126.30Ma, base in Aptian stage). Data source: Bown et al. 1998

Plot of occurrence data:

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

    References:

    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

    Jeremiah, J. (2001). A Lower Cretaceous nannofossil zonation for the North Sea Basin. Journal of Micropalaeontology. 20: 45-80. gs


    nannotaxlogo400px

    Lithraphidites houghtonii compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 13-12-2019

    Taxon Search:
    Advanced Search

    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10586 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