Opertum incognitum  (Voloshina, 1972)
 
Class: Rotaliata  Subclass: Textulariana  Order: Luftosiida  Family: Ataxophragmiidae
 
found  unknown
   Eastern European Plain   Ukraine
 
Geological Time: Cretaceous  Upper Cretaceous  Maastrichtian
 
the image is from a publication, which is cited in the table descriptions of the below cited book by
 
 
 
The identification is based upon:
 Loeblich, A. R., Tappan, H. N., 1987: Foraminiferal genera and their classification.  Van Nostrand, Reinhold Co. New York 1728 pp. Plate 148, Fig. 4-5
 
 
genus.php?no=1013988&aktion=suche
 
dataset number: FEU-1013988