Monomarginatus quaternarius

Classification: Mesozoic -> Eiffellithales -> Chiastozygaceae -> Monomarginatus -> Monomarginatus quaternarius
Sister taxa: M. pectinatus, M. quaternarius, M. sp.,

Distinguishing features: Species of Monomarginatus with four large triangular central perforations and four outer elliptical perforations


Citation: Monomarginatus quaternarius Wind & Wise in Wise & Wind, 1977
Rank: Species

Farinacci & Howe catalog pages: Monomarginatus quaternarius *

Distinguishing features: Species of Monomarginatus with four large triangular central perforations and four outer elliptical perforations

Search data:
TagsLITHS: murolith, elliptical, CA: concentric-ring(s), cross-axial, grill, process, V-UNITS: V-prominent, DETAILS: ca_disjunct, rim-unicyclic,
MetricsLith size: 8->10µm;
Sources: original description & illustrated specimens
The morphological data given here can be used on the advanced search page. See also these notes

Geological Range:
Notes: Confined to the Campanian in the Boreal realm according to Burnett (1998), and used as a subzone marker. It was, however, described from Maastrictian sedments in the Southern Ocean, co-occuring with Nephrolithus frequens. So, its range in the Austral Realm is evidently longer than in the Boreal. [my interpretation - JRY 2017]
Last occurrence (top): within Maastrichtian Stage (66.04-72.05Ma, top in Maastrichtian stage). Data source: Wise & Wind 1977, Pospichal & Wise 1990
First occurrence (base): within UC15a subzone (79.00-80.97Ma, base in Campanian stage). Data source: Burnett 1998

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: Monomarginatus quaternarius, synonyms included - Monomarginatus quaternarius;
  • space-time plot :: Samples map :: Parent: Monomarginatus


    Burnett, J. A. (1998). Upper Cretaceous. In, Bown, P. R. (ed.) Calcareous Nannofossil Biostratigraphy. British Micropalaeontological Society Publication Series. 132-199. gs :: ::

    Pospichal, J. J. & Wise, S. W. (1990b). Maestrichtian calcareous nannofossil biostratigraphy of Maud Rise ODP leg 113 sites 689 and 690, Weddell Sea. Proceedings of the Ocean Drilling Program, Scientific Results. 113: 465-487. gs :: view :: open

    Thibault, N. (2010). Calcareous nannofossils from the boreal Upper Campanian- Maastrichtian chalk of Denmark. Journal of Nannoplankton Research. 31(1): 39-56. gs :: view :: open

    Wise, S. W. & Wind, F. H. (1977). Mesozoic and Cenozoic calcareous nannofossils recovered by DSDP Leg 36 drilling on the Falkland Plateau, south-west Atlantic sector of the Southern Ocean. Initial Reports of the Deep Sea Drilling Project. 36(269-491): -. gs :: view :: open


    Monomarginatus quaternarius compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 5-8-2020

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    Short stable page link: Go to to create a permanent copy of this page - citation notes

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