Conusphaera maledicto


Classification: Mesozoic -> Nannoliths inc sedis -> Eoconusphaeraceae -> Conusphaera -> Conusphaera maledicto
Sister taxa: C. mexicana, C. rothii, C. maledicto, C. sinespina, C. sp.,

Distinguishing features: Small Conusphaera (<4 µm) with central core divided into 4 segments in side view. Elliptical in plan view


Taxonomy:

Citation: Conusphaera maledicto Varol & Bowman 2019
Rank: Species
Notes & discussion:

Etymology: From Latin maledicto, fence – referring its fencelike appearance in the light microscope (LM).

Farinacci & Howe catalog pages: Conusphaera maledicto [no catalog entry yet]

Distinguishing features: Small Conusphaera (<4 µm) with central core divided into 4 segments in side view. Elliptical in plan view


Morphology remarks: C. maledicto differs from C. mexicana minor in displaying four core segments in side view (at 0°) in the light microscope and in being strongly elliptical in plan view. In side view C. mexicana minor has only two core segments and is sub-circular in plan view. It is distinguished from C. rothii minor by having straight core segments. C. sinespina is similar but the core elements are much lower, not rising above the wall. C. maledicto has probably been included in C. mexicana minor. (Varol & Bowman 2019)

Search data:
TagsLITHS: nannolith-radiate, elliptical, cylindrical, CA: closed, DETAILS: rim-unicyclic,
MetricsLith size: 3->4µm;
Sources: original description & illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within Late Tithonian Substage (145.01-147.72Ma, top in Tithonian stage). Data source: Varol & Bowman 2019
First occurrence (base): within Early Tithonian Substage (147.72-152.06Ma, base in Tithonian stage). Data source: Varol & Bowman 2019

Plot of occurrence data:

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

    References:

    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

    Varol, O. & Bowman, A. R. (2019). Taxonomic revision of selected Late Jurassic (Tithonian) calcareous nannofossils and the application of mobile mounting. Neues Jahrbuch für Geologie und Paläontologie Abhandlungen. 291: 65-87. gs


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    Conusphaera maledicto compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 6-4-2020

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=11365 Go to Archive.is to create a permanent copy of this page - citation notes



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