Laeviheterohelix euryconus (Ehrenberg, 1854)       

Class: Rotaliata  Subclass: Globigerinana  Order: Heterohelicida  Family: Heterohelicidae

found in material from Miscellaneous Localities   American South   USA   
Missouri River Basin

Geological Time: Cretaceous  Upper Cretaceous  Santonian


the SEM image is provided by Dr. M. Dan Georgescu

View of a specimen of Laeviheterohelix euryconus (Ehrenberg, 1854)


The identification is based upon:
Georgescu, M. D., 2013: Revised evolutionary systematics of the Cretaceous planktic foraminifera described by C.G. Ehrenberg in micropaleontology, vol. 59, no. 1. pages 1-49. Plate 3, Fig. 5-7