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Marginotruncana


Classification: pf_mesozoic -> Globotruncanidae -> Marginotruncana
Sister taxa: Abathomphalus, Contusotruncana, Dicarinella, Gansserina, Globotruncana, Globotruncanella, Globotruncanita, Loeblichella, Marginotruncana, Radotruncana,
Daughter taxa: (blue => in age window 0-800Ma)
















Specimens which cannot be assigned to established species

Taxonomy

Citation: Marginotruncana Hofker, 1956
Rank: Genus
Basionym: Rosalina marginata
Type species: Rosalina marginata Reuss, 1846
Synonyms:

Original description: Globotruncaninae, welche vom Anfang an das Protoforamen verloren haben oder nie ausbildeten Auch ist nicht unmoglich, dass das Protoforamen mit dem Deuteroforamen verschmolzen ist. Daher ist die ventrale Kammerwand nicht schief ausgebildet, sondern stutzt sich gegen den Nabel mitder Umbilicallipe (Tenon) ab; die Grenze des perforierten Wandteiles mit der porenlosed Lippe ist parallel zum Nabel. Die Suturen der Kammern sind radial auf der Ventralseite.Familie Marginolamelidae. Unter familie Globotruncaninae. Cenoman-Maastricht:

Entries in the Catalog of original descriptions: Marginotruncana, Sigalitruncana

Distinguishing features: Test trochospiral, biconvex to planoconvex, sutures sigmoidal, especially on the umbilical side, curved, elevated and may be beaded on the spiral side, imperforate carinal band between the two peripheral keels, peripheral outline entire to lobulate; wall calcareous, perforate, surface smooth to pustulose; primary aperture interiomarginal and extraumbilical-umbilical, bordered by a triangular porticus, those of successive apertures fusing and may even form true tegilla, infralaminal and occasionally intralaminal accessory apertures present.

Geological Range:
Last occurrence (top): within Campanian Stage (72.05-83.64Ma, top in Campanian stage). Data source: Total of range of species in this database
First occurrence (base): within Turonian Stage (89.77-93.90Ma, base in Turonian stage). Data source: Total of range of species in this database

Plot of occurrence data:

Dec 2017 - Plotting of Neptune data has been re-enabled on the Mesozoic pages following revision of the age-models in Neptune. The data is, however, still very sparse for the Early Cretaceous

References:

Hofker, J. (1956). Die Globotruncanen von Nordwest-Deutshland und Holland. Neues Jahrbuch für Geologie und Paläontologie, Abhandlungen. 103: 312-340. gs :: ::

Korchagin, V. I. (1982). Систематика глоботрунканин - Systematics of the Globotruncanids. Byulletin Moskovskogo Obshchestva Ispytateley Prirody Otdel Geologicheskiy. 57(5): 114-121. gs :: ::

Loeblich, A. R. & Tappan, H. (1988). Foraminiferal Genera and Their Classification (Volume I-II). Van Nostrand Reinhold Co., New York. 1-1059. gs :: ::


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Marginotruncana compiled by the pforams@mikrotax project team viewed: 14-8-2020

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Short stable page link: http://mikrotax.org/pforams/index.php?id=110328 Go to Archive.is to create a permanent copy of this page - citation notes



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