Pontosphaera pygmaea


Classification: Coccolithophores -> Zygodiscales -> Pontosphaeraceae -> Pontosphaera -> Pontosphaera pygmaea
Sister taxa: << < P. wechesensis, P. fimbriata, P. brinkhuisii, P. hollisii, P. romansii, P. japonica, P. plana, P. rimosa, P. pectinata, P. wilsonii, P. punctosa, P. clinosulcata, P. perforomarginata, P. pulcheroides, P. pulchra, P. pygmaea, P. ocellata, P. duocava, P. exilis, P. pax, P. obliquipons, T. omarians, P. sp.,

Taxonomy:

Citation: Pontosphaera pygmaea (Locker, 1967) Bystricka & Lehotayova, 1974
Rank: Species
Basionym: Discolithina pygmaea Locker, 1967
Synonyms: NB The epithet zigzag has been more widely used and is more descriptive but pygmaea has priority.

Distinguishing features: Small Pontosphaera with proximal grill and narrow transverse bar, usually with a distinct kink.

Farinacci & Howe catalog pages: Discolithina pygmaea * , Transversopontis zigzag *


Morphology remarks: Small pores can be present on the basal plate and faint scalloping of the rim is present in some specimens (Self-Trail 2011)

Search data:
TagsLITHS: murolith, elliptical, RIM: outer wall acw-imbricate, CA: bar-diagonal, bar-diagonal NW-SE, pores, bar,
CSPH: not known, V-UNITS: outer-rim, V-prominent, R-UNITS: c-str, inner-rim, px-plate, R-prominent, DETAILS: ca_conjunct, rim-bicyclic, isogyres oblique, isogyres separated,
MetricsLith size: 4->7µm;
Sources: lith size from ODs & illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes:

Reported as ranging from the middle Eocene (e.g. Self-Trail, 2011) to Oligocene but is often most conspicuous across the Eocene/Oligocene transition. [Bown & Newsam 2017]


Last occurrence (top): within Oligocene Epoch (23.03-33.89Ma, top in Chattian stage). Data source: type-description
First occurrence (base): within NP12 zone (50.50-53.70Ma, base in Ypresian stage). Data source: Self-Trail 2011 (corrected by pers. comm. in the publication range was misquoted as NP14-16)

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: Pontosphaera pygmaea, synonyms included - Discolithina pygmaea; Pontosphaera pygmaea; Transversopontis pygmaea; Transversopontis zigzag;
  • space-time plot :: Samples map :: Parent: Pontosphaera

    References:

    Aubry, M-P. (1986a). Palaeogene calcareous nannofossil biostratigraphy of northwestern Europe. Palaeogeography Palaeoclimatology Palaeoecology. 55: 267-334. gs :: ::

    Aubry, M. -P. (1990). Handbook of Cenozoic calcareous nannoplankton. Book 4: Heliolithae (Helicoliths, Cribriliths, Lopadoliths and others). Micropaleontology Press, American Museum of Natural History, New York. 381-. gs :: ::

    Bown, P. R. & Newsam, C. (2017). Calcareous nannofossils from the Eocene North Atlantic Ocean (IODP Expedition 342 Sites U1403–1411). Journal of Nannoplankton Research. 37(1): 25-60. gs :: view :: open

    Hay, W. W., Mohler, H. P., Roth, P. H., Schmidt, R. R. & Boudreaux, J. E. (1967). Calcareous nannoplankton zonation of the Cenozoic of the Gulf Coast and Caribbean-Antillean area, and transoceanic correlation. Transactions of the Gulf Coast Association of Geological Societies. 17: 428-480. gs :: ::

    Locker, S. (1967c). Neue, statigraphisch wichtige Coccolithophoriden (Flagellata aus dem norddeutschen Altetiar). Monatsberichte der Deutschen Akademie der Wissenschaften zu Berlin. 9(9-10): 758-769. gs :: ::

    Perch-Nielsen, K. (1984b). Validation of new combinations. INA Newsletter. 6(1): 42-46. gs :: view :: open

    Self-Trail, J. (2011). Paleogene Calcareous Nannofossils of the South Dover Bridge core, Southern Maryland (USA). Journal of Nannoplankton Research. 32(1): 1-28. gs :: view :: open

    Shepherd, C. L. & Kulhanek, D. K. (2016). Eocene nannofossil biostratigraphy of the mid-Waipara River section, Canterbury Basin, New Zealand. Journal of Nannoplankton Research. 26(1): 33-59. gs :: view :: open

    Varol, O. (1998). Palaeogene. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 200-224. gs :: ::


    nannotaxlogo400px

    Pontosphaera pygmaea compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 5-6-2020

    Taxon Search:
    Advanced Search

    Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=1094 Go to Archive.is to create a permanent copy of this page - citation notes



    Comments (0)

    No comments yet on this page. Please do add comments if you spot any problems, or have information to share

    Add Comment

    * Required information
    1000
    Captcha Image
    Powered by Commentics