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

 

found in the area of  Dallas-Fort Worth

 

   American South   USA

 

North Central Texas, Dallas-Fort Worth area

Lower Eagle Ford Group, lower Britton FM, Turner

Geological Time: Cretaceous  Upper Cretaceous  Cenomanian

 

Britton Formation

the image is made by Dr. Georg Rosenfeldt and Michael Hesemann with support of the
Naturwissenschaftlicher Verein in Hamburg


Read more in Virginia Friedmans Master Thesis

material provided by

 

 

View of a specimen of Protoheterohelix washitensis (Tappan, 1940)

 

 

The identification is based upon:

 Caron, Michele, 1985: Cretaceous planktic foraminifera Bolli et al., 1985: Plankton Stratigraphy Cambridge University Press 599 pp. Plate 24, Fig. 6-7

 

 

 

dataset number: FEU-1004370