Discorhabdus hannibalis


Classification: Mesozoic -> Podorhabdales -> Biscutaceae -> Discorhabdus -> Discorhabdus hannibalis
Sister taxa: D. biradiatus, D. corollatus, D. criotus, D. hannibalis, D. ignotus, D. patulus, D. striatus, D. watkinsii, D. sp.,

Distinguishing features: Small to very small, with two closely appressed shields; proximal shield is wider than the distal shield, protruding beyond it and is at least twice as thick as the distal shield in side view.


Taxonomy:

Citation: Discorhabdus hannibalis Aguado, 2012
Rank: Species

Farinacci & Howe catalog pages: Discorhabdus hannibalis *

Distinguishing features: Small to very small, with two closely appressed shields; proximal shield is wider than the distal shield, protruding beyond it and is at least twice as thick as the distal shield in side view.


Morphology remarks: Although this species has a typical placolith structure, it has a peculiar shield construction (proximal shield wider and thicker than the distal one) that is not seen in any other species of the genus Discorhabdus.

See also: Helicorhabdus asymetricus - similar form with spine, possibly a senior synonym;

Geological Range:
Notes: source Aguado (2012)
Oued Bahloul (Tunisia), upper Cenomanian to lower Turonian (Subzone UC3c–UC6c);
El Chorro section (Betic Cordillera, Spain), lower Cenomanian (Zone UC3).
Last occurrence (top): within UC6 zone (93.55-93.90Ma, top in Turonian stage). Data source: Aguado 2012
First occurrence (base): within UC3c subzone (94.79-95.02Ma, base in Cenomanian stage). Data source: Aguado 2012

Plot of occurrence data:

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

    References:

    Aguado, R. (2012). Two new Cretaceous calcareous nannofossils from SE Spain and Tunisia. Journal of Nannoplankton Research. 32(2): -. gs


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    Discorhabdus hannibalis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 18-10-2019

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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10391 Go to Archive.is to create a permanent copy of this page - citation notes



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