Helicosphaera walbersdorfensis

Classification: Coccolithophores -> Zygodiscales -> Helicosphaeraceae -> Helicosphaera -> H. walbersdorfensis group -> Helicosphaera walbersdorfensis
Sister taxa: H. stalis, H. vedderi, H. walbersdorfensis, H. waltrans, H. watkinsii,

Distinguishing features: Medium sized. Flange ends in broad wing. Central-area with two normally oblique pores separated by narrow conjunct bar.


Citation: Helicosphaera walbersdorfensis Muller, 1974
Rank: Species

Farinacci & Howe catalog pages: Helicosphaera californiana * Helicosphaera minuta * Helicosphaera muellerae * Helicosphaera walbersdorfensis + *

Distinguishing features: Medium sized. Flange ends in broad wing. Central-area with two normally oblique pores separated by narrow conjunct bar.

Size: Medium-sized, 5-8µm. NB In the original description of Muller (1974) the size is quoted 3.5-4.5 µm but the plate magnification indicate that the specimens are significantly larger.

Search data:
TagsLITHS: placolith, asymmetric, RIM: wing, CA: bar-diagonal NE-SW, bar-diagonal,
CSPH: ellipsoidal, varimorphic, V-UNITS: distal shield, R-UNITS: blanket, c-str, px-plate, DETAILS: ca_conjunct, rim-bicyclic, isogyres kinked, isogyres oblique, isogyres separated,
MetricsLith size: 5->8µm;
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Last occurrence (top): within NN8 zone (10.55-10.89Ma, top in Tortonian stage). Data source: Boesiger et al 2017
First occurrence (base): within NN4 zone (14.91-17.95Ma, base in Burdigalian stage). Data source: Boesiger et al 2017

Plot of occurrence data:

  • Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
  • Note to users in China - the diagram may not plot unless you use a VPN since I use google services on the website. If this is a problem please contact me 谢谢.
  • Taxon plotted: Helicosphaera walbersdorfensis, synonyms included - Helicosphaera california; Helicosphaera californiana; Helicosphaera minuta; Helicosphaera mullerae; Helicosphaera walbersdorfensis; space-time plot :: Samples map :: Parent: H. walbersdorfensis group


    Bukry, D., (1981). Pacific coast coccolith stratigraphy between Point Conception and Cabo Orientes, Deep Sea Drilling Project Leg 63. Initial Reports of the Deep Sea Drilling Project, 63: 445-471.GS

    Müller, C., (1974). Nannoplankton aus dem Mittel-Miozän von Walbersdorf (Burgenland). Senckenbergiana lethaea, 55: 389-405.GS

    Müller, C., (1981). Beschreibung neuer Helicosphaera-Arten aus dem Miozän und Revision biostratigraphischer Reichweiten einiger neogener Nannoplankton-Arten. Senckenbergiana lethaea, 61: 427-435.GS

    Theodoridis, S., (1984). Calcareous nannofossil biostratigraphy of the Miocene and revision of the helicoliths and discoasters. Utrecht Micropaleontological Bulletin, 32: 1-271.GS

    Varol, O., (1989). Calcareous nannofossil study of the central and western Solomon Islands., Circum-Pacific Council for Energy and Mineral Resources Earth Sciences. Geology and offshore resources of Pacific island arcs, pp. 239-268.GS

    Young, J.R., (1998). Neogene. In: Bown, P.R. (Editor), Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publications Series. Chapman & Hall, London, pp. 225-265.GS


    Helicosphaera walbersdorfensis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 24-4-2019

    Taxon Search:
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    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=691 Go to Archive.is to create a permanent copy of this page - citation notes

    Comments (1)

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    Ines Galovic (Croatia)
    First occurrence is observed in Paratethian NN4b subzone of Badenian (Andreyeva-Grigorovich et al., 2001), which belongs to Mediterranean MNN4b respectinely (Fornaciari et al, 1996).
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