The fact that we find Eunotosaurus at the base of the Karoo succession strongly suggest that there are
more ancestral forms of tortoises still to be discovered in the Karoo,» Rubidge added.
The same
ancestral autosomal recessive mutation for the progressive rod cone degeneration (prcd)
form of progressive retinal atrophy (PRA) is found in the American Cocker Spaniel, American Eskimo Dog, Australian Cattle Dog, Australian Shepherd, Chesapeake Bay Retriever, Chinese Crested Dog, English Cocker Spaniel, Entelbucher Mountain Dog, Finnish Lapphund, Golden Retriever, Kuvasz, Labrador Retriever, Lapponian Herder, Norwegian Elkhound, Nova Scotia Duck Trolling Retriever, Poodle, Portuguese Water Dog, Silky Terrier, Spanish Water Dog, Stumpy Tail Cattle Dog Swedish Lapphund, and Yorkshire Terrier.3 This list continues to grow as
more breeds are discovered with the same defective gene.