Hemingfordian North American Land Mammal Age – Florida Vertebrate Fossils https://www.floridamuseum.ufl.edu/florida-vertebrate-fossils/land-mammal-ages/hemingfordian/
Defining taxon: first appearance of 17 mammalian genera dispersing more or less simultaneously from Eurasia (Tedford et al., 2004); among those found in Florida are the bear-dog Amphicyon, the hemicyonine bear Phoberocyon, the mustelid Leptarctus, the rhino Floridaceras, and the dromomerycid Aletome
MacFadden, B. J., J. I. Bloch, H. Evans, D. A. Foster, G. S. Morgan, A. F.
