Set number: 283

  • Discolithina desueta 15006 1
  • Discolithina desueta 15005 2
  • Discolithina desueta 15002 3
  • Discolithina desueta 15009 4
  • Discolithina desueta 15007 5
  • Discolithina desueta 15004 6
  • Discolithina desueta 15003 7
  • Discolithina desueta 15008 8
    10µm
Discolithina desueta, Early Oligocene, Pouzdrany, Chzech Republic
Final Epithet
Discolithina desueta Müller, 1970
Basionym

Discolithina desueta Müller, 1970

Synonyms


Description

Species of Discolithina Loeblich & Tappan (1963) having a ring of large pores at the periphery of the central area and irregularly arranged smaller pores in the centre. The wall displays maximum birefringence while the proximal plate's centre is weakly to non-birefringent under the polarised light.

Remarks

Discolithina desueta differs from Coccolithes anisotrema Kamptner (1955) [invalid ICN Art. 35.1] by having irregularly arranged smaller pores in the centre, whereas the latter has regularly arranged smaller pores in three complete ring of cycles.

References

Kamptner, E., (1955): Fossile Coccolithineen-Skelettreste aus Insulinde. Eine mikropaläontologische Untersuchung. - Verhandelingen der Koninklijke Nederlandse Akademie van Wetenschappen, Afdeling Natuurkunde. ser 2, 50: 1-105.

Loeblich, A. R. & Tappan, H., (1963): Type fixation and validation of certain calcareous nannoplankton genera. - Proceedings of the Biological Society of Washington. 76: 191-198.

Müller, C., (1970b): Nannoplankton-Zonen der Unteren-Meeresmolasse Bayerns. - Geologica Bavarica. 63: 107-118.