''Osbornodon iamonensis'' is an extinct species of hesperocyonine, a predecessor of modern dogs that were endemic to

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and th ...

and which lived from the

Oligocene The Oligocene ( ) is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present ( to ). As with other older geologic periods, the rock beds that define the epoch are well identified but t ...

Early Miocene The Early Miocene (also known as Lower Miocene) is a sub-epoch of the Miocene epoch (geology), Epoch made up of two faunal stage, stages: the Aquitanian age, Aquitanian and Burdigalian stages. The sub-epoch lasted from 23.03 ± 0.05 annum, Ma to ...

epoch 23.6—16.3 Ma and existed for approximately . It was named for

Lake Iamonia Lake Iamonia is a large, subtropical prairie lake in northern Leon County, Florida, United States, created during the Pleistocene epoch. History Forming Iamonia Lake Iamonia's base was established during the Early Pleistocene through submergenc ...

in northern

Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and ...

. Fossils have been found in Florida and

Nebraska Nebraska () is a state in the Midwestern region of the United States. It is bordered by South Dakota to the north; Iowa to the east and Missouri to the southeast, both across the Missouri River; Kansas to the south; Colorado to the sout ...

. In the Thomas Farm Site in Gilchrist County, Florida, it is the most common carnivore found in that area.

References

*R. M. Nowak. 1991. Walker's Mammals of the World. Maryland, Johns Hopkins University Press (edited volume) II (K. Behrensmeyer/K. Behrensmeyer/J. Alroy) *Wang, X. 2003
New Material of ''Osbornodon'' from the Early Hemingfordian of Nebraska and Florida
Bulletin of the American Museum of Natural History, 279:163-176. Hesperocyonines Oligocene carnivorans Miocene carnivorans Oligocene mammals of North America Miocene mammals of North America Paleontology in Florida Paleogene Florida Neogene Florida Rupelian species first appearances Aquitanian species extinctions {{canid-stub