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Dallas-Fort Worth Area, Texas, USA     32.5 N, 97.1 W
lower Britton Formation

Upper Cretaceous, Upper Cenomanian, Lower Eagle Ford Group, lower Britton Formation, Turner Park Member
               
Specimens provided by Virginia Friedman, M.S. Paleontology, UT Dallas (2004), Texas, USA
Read more: Short Overview
Friedman,V. 2004. Paleontology, Paleoecology and Depositional
Environmentof the lower Eagle Ford Group in North Central Texas.
Masters Thesis, University of Texas at Dallas. 176 pp.
Download Part 1 as PDF (12 MB)         Download PDF Part 2 as PDF (10 MB)
               

Heterohelix 
--- 
Heterohelix moremani
(Cushman 1938) 
Heterohelix moremani
(Cushman 1938) 
Muricohedbergella delrioensis
(Carsey, 1926) 
   
Muricohedbergella delrioensis
(Carsey, 1926) 
Muricohedbergella delrioensis
(Carsey, 1926) 
Muricohedbergella delrioensis
(Carsey, 1926) 
Muricohedbergella delrioensis
(Carsey, 1926) 
   
Muricohedbergella delrioensis
(Carsey, 1926) 
Muricohedbergella delrioensis
(Carsey, 1926) 
Muricohedbergella delrioensis
(Carsey, 1926) 
Muricohedbergella delrioensis
(Carsey, 1926) 
   
Muricohedbergella delrioensis
(Carsey, 1926) 
Muricohedbergella delrioensis
(Carsey, 1926) 
Muricohedbergella delrioensis
(Carsey, 1926) 
Protoheterohelix 
--- 
   
Protoheterohelix washitensis
(Tappan, 1940) 
Protoheterohelix washitensis
(Tappan, 1940) 
Protoheterohelix washitensis
(Tappan, 1940) 
Protoheterohelix washitensis
(Tappan, 1940) 
   
Protoheterohelix washitensis
(Tappan, 1940)