Nannotax3 - ntax_Farinacci - Discoaster bengalica Nannotax3 - ntax_Farinacci - Discoaster bengalica

CATALOG - Discoaster bengalica


Folder trail: ntax_Farinacci -> D -> Discoaster -> Discoaster bengalica
Folders this level: << < D. archipelagoensis, D. argutus, D. arneyi, D. artatus, D. astellaris, D. aster, D. asteriscus, D. asymmetricus, D. asymmetroivrachiones, D. athanasiui, D. atlanticus, D. aulakos, D. backmanii, D. barbadiensis, D. bellus, D. bengalica, D. bergenii, D. berggrenii, D. berggrenii extensus, D. bifax, D. bifidus, D. binodosus, D. binodosus binodosus, D. binodosus hirundinus, D. blackstockae, D. bolivariae, D. bollii, D. bordii, D. borroi, D. boulangeri, D. braarudii> >>

Original descriptions of taxa - also emended descriptions for a few taxa. For coccolithophores, and many calcispheres, these are pages from the Farinacci & Howe Catalog of Calcareous Nannofossils. In other cases (e.g. non-calcifying haptophytes) the data is directly compiled on this site. The "Catalogue of Calcareous Nannofossils" was originally compiled by Prof A. Farinacci 1969-1989, since 2000 it has been updated and extended by Richard Howe - see The Farinacci and Howe Catalog - an Introduction.
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Current identification:

Compiled data

Citation: Discoaster bengalica Varol & Bowman 2024
Taxonomic rank: species
Type specimens: Holotype: Plate 34, Figs. 1-20 (same specimen).
Type age (chronostrat): Zone NN7, Late Miocene.
Standardised type level: 123_UPPER MIOCENE
Type locality: IODP Leg 354, Hole 1451B, Ninetyeast Ridge, Bengal Fan, Indian Ocean, core 19R, section 1W, 78-79 cm.
Type repository: Varol Research, Llandudno
Repository Country: Wales

Combinations:
  • Discoaster bengalica Varol & Bowman 2024 (basionym)

  • Original Description

    A symmetrical pentagonal species has segments with tapering arms with bifurcated terminations. The distinct prox22 imal ridges without any knob decorate the proximal side, and sutural ridges created by the deep cavities are present on the distal side.

    Size:
    Dimensions of holotype: Maximum diameter: 9.84 µm, Diameter of the central area: 3.94 µm, Length of arms: 2.95 µm, Diameter of the proximal knob: 3.37 µm (measurements from bright field micrograph)

    Etymology:
    After the holotype area, the Bay of Bengal.

    Extra details from original publication
    Remarks: Discoaster bengalica and Discoaster asymmetroivrachiones have pentagonal outlines. Discoaster bengalica is a symmetrical species with tapering arms with bifurcated termination, whereas Discoaster asymmetroivrachiones have an asymmetrical outline with strongly tapering arms without bifurcations.

    Occurrence: This species is recorded from IODP Leg 354, Hole 1451B, Ninetyeast Ridge, Bengal Fan, Indian Ocean and rarely various commercial oil wells in the Gulf of Mexico.

    Stratigraphic range: Middle-Late Miocene (Zone NN7).

    References:

    Varol, O. & Bowman, A. R. (2024). The new Middle Miocene genus Olladiscoaster, and related and associated discoasters. Grzybowski Foundation Special Publication. 28: 1-102. gs


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    Discoaster bengalica: Catalog entry compiled by Jeremy Young. Viewed: 16-9-2026

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