Monomarginatus


Classification: Mesozoic -> Eiffellithales -> Chiastozygaceae -> Monomarginatus
Sister taxa: Amphizygus, Archaeozygodiscus, Gorkaea, Placozygus, Reinhardtites, Tranolithus, Zeugrhabdotus, Staurolithites, Diadorhombus, Rhabdophidites, Ahmuellerella, Bukrylithus, Heteromarginatus, Misceomarginatus, Monomarginatus, Neocrepidolithus, Vacherauvillius, Chiastozygus, Braloweria, Clepsilithus, Crepidolithus, Loxolithus, Tubirhabdus,

Distinguishing features: Muroliths with narrow, unicyclic rim and wide central-area spanned by axial, concentric and lateral bars.


Daughter taxa: (blue => in age window 0-800Ma)
Large species of Monomarginatus with 8 to 16 perforations between diamond-shaped inner frame and outer rim
Species of Monomarginatus with four large triangular central perforations and four outer elliptical perforations
Specimens not identified to species level

Taxonomy:

Citation: Monomarginatus Wind & Wise in Wise & Wind, 1977
Rank: Genus
Type species: Monomarginatus pectinatus Wind & Wise in Wise & Wind, 1977

Farinacci & Howe catalog pages: Monomarginatus *

Distinguishing features: Muroliths with narrow, unicyclic rim and wide central-area spanned by axial, concentric and lateral bars.

Geological Range:
Last occurrence (top): at top of Maastrichtian Stage (100% up, 66Ma, in Maastrichtian stage). Data source: Total of range of species in this database
First occurrence (base): at base of Campanian Stage (0% up, 83.6Ma, in Campanian stage). Data source: Total of range of species in this database

Plot of occurrence data:

References:

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

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


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Monomarginatus compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 22-10-2019

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Short stable page link: http://mikrotax.org/Nannotax3/index.php?id=10696 Go to Archive.is to create a permanent copy of this page - citation notes



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