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Osbornodon iamonensis Quick Facts Common Name: Iamonia dog The species is the most abundant carnivore at the Thomas Farm fossil site. It was about the size of a modern coyote, and probably had a similar omnivorous diet. Age Range Early Miocene Epoch; late Arikareean to early Hemingfo
Olsen (1956) cleared up the worst of this mess, demonstrating
Tapirus polkensis Quick Facts Common Name: Olsen’s
Scientific Name and Classification Tapirus polkensis Olsen
Amphicyon longiramus Quick Facts Common Name: White’s bear-dog The Florida Museum of Natural History has over 550 specimens of this species in its collection, and has the only known mounted skeleton of the species on public display. Amphicyon longiramus was the top carnivore in Florida 1
observed was within a single sexually dimorphic species (Olsen
Thomas Farm University of Florida Vertebrate Fossil Locality GI001 Location About 8 miles north-northeast of Bell, Gilchrist County, Florida; 29.86° N, 82.83° W. Age Early Miocene Epoch; early Hemingfordian land mammal age About 18 million years old Basis of Age Biochronology (an
Olsen, S. J. 1956.
Desmodus stocki Quick Facts Common Name: Stock’s vampire bat With a range extending to Virginia, this species lived further north than any other vampire bat, fossil or living. Desmodus stocki likely weighed about 50% more than the living vampire Desmodus rotundus. Its large, sharp canin
Florida fossil localities known from Reddick cave (Olsen
Alligator olseni Quick Facts Common Name: Olsen’s Alligator Adult Alligator olseni specimens are generally smaller than adult Alligator mississippiensis specimens, with few individuals exceeding more than seven to eight feet in length, while fossils of Alligator mississippiensis from Florid
White, 1942 Source of Species Name: Named for Russel Olsen
Palmetto Fauna University of Florida Vertebrate Fossil Locality PO005, along with over 85 individual mines or specific areas within mines. A list of mines and their locality numbers provided below. Location The Palmetto Fauna derives from the Central Florida Phosphate District, a region of commer
Olsen, S. J. 1956.
Archaeohippus blackbergi Quick Facts Common Name: Blackberg’s dwarf horse Archaeohippus is a genus of three-toed horses that lived 19 to 13 million years ago in North America. Two of the five known species lived in Florida. Archaeohippus blackbergi was small, weighing approximately between 5
include Schlaikjer (1937), White (1942), Bader (1956), Olsen
Updated and edited by Roger W. Portell
OLSEN, S.J. 1979.
Introduction and Definitions Land mammal ages (abbreviated LMAs) are intervals of geologic time characterized by a distinctive set of mammals (usually genera) for a particular geographic region (Lindsay, 2003). The geographic regions for the most commonly used LMAs are entire continents, so there a
the late Neogene dwarf tapir, Tapirus polkensis (Olsen
