Marginotruncana marginata

Taxonomy

Original description: 0,25—0,6'"gross, kreisrund, sehrniedergedrückt, scheiben- förmig. Das Gewinde sehr wenig erhaben, aus zwei Umgängen bestehend; der lezte mit 6 Kammern. Im Ganzen 10—12 Kammern, oval, sehr schief, bogenförmig. Jede ist auf der obern Fläche am äussern Rande mit einem sehr schmalen, erhabenen Saume eingefasst, in der Mitte sehr flach gewölbt oder selbst seicht konkav ; an der untern Fläche sind sie massig gewölbt und durch wenig tiefe Nähte gesondert die ,viel weniger schief verlaufen, als auf der obern Fläche. Der äussere Umfang der Kammern senkrecht abgestutzt. Die untere Fläche weit genabelt. Die Oberfläche des ganzen Gehäuses mit kleinen Spitzen dicht übersäet. T. VIII, F. 54 stellt einen Steinkern dar.

Entries in the Catalog of original descriptions: Rosalina marginata, Globotruncana fresnoensis, Thalmanninella wicheri

Geological Range:
Last occurrence (top): within D. asymetrica zone (83.65-85.60Ma, top in Santonian stage). Data source: [copied from Chronos database]
First occurrence (base): within H. helvetica zone (92.51-93.52Ma, base in Turonian stage). Data source: [copied from Chronos database]

Plot of range and occurrence data:

• Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
• Triangles indicate an event for which a precise placement has been suggested
• Histogram - Neptune occurrence data from DSDP and ODP proceedings. Pale shading <50 samples in time bin. Interpret with caution & read these notes
• Taxon plotted: Marginotruncana marginata, synonyms included - Globotruncana fresnoensis; Globotruncana marginata; Globotruncana verrucosa; Marginotruncana marginata; Thalmanninella wicheri;
• See also space-time plot :: Samples map :: Parent: Marginotruncana

Marginotruncana marginata compiled by the pforams@mikrotax project team viewed: 25-4-2025 Taxon Search: Advanced Search Short stable page link: https://mikrotax.org/pforams/index.php?id=110334 Go to Archive.is to create a permanent copy of this page - citation notes

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