Oridorsalis umbonatus (Reuss, 1851)
 
Class: Rotaliata  Subclass: Rotaliana  Order: Rotaliida  Family: Alabaminidae
 
found in the North Atlantic unknown
      none
 
Geological Time: Quaternary  Holocene  recent

the drawings are published in the book cited below, author and collection:
 
 
View of a specimen of Oridorsalis umbonatus (Reuss, 1851)

var. ehrenbergii
 
The identification is based upon:
 Cushman, J., A., 1931: The Foraminifera of the Atlantic Ocean. Part 8. Rotaliidae, Amphisteginidae, Calcarinidae, Cymbaloporettidae, Globorotaliidae, Anomalinidae, Planorbulinidae, Rupertiidae and Homotremidae.  Smithsonian Institution United States National Museum Bulletin 104.  Plate 9, Fig. 3
 
 
genus.php?no=1013085&aktion=suche
 
dataset number: FEU-1013085
 
 
Citation:
Cushman, J., A., 1931: The Foraminifera of the Atlantic Ocean. Part 8. Rotaliidae, Amphisteginidae, Calcarinidae, Cymbaloporettidae, Globorotaliidae, Anomalinidae, Planorbulinidae, Rupertiidae and Homotremidae. Smithsonian Institution United States National Museum Bulletin 104. Plate 9, Fig 3