Mammalia - Carnivora - Canidae

Alternative combinations: Cynodesmus iamonensis, Mesocyon iamonensis

Synonyms: Cynodesmus nobilis Simpson 1932, Paradaphoenus nobilis Simpson 1932, Paradaphoenus tropicalis White 1942

Full reference: E. H. Sellards. 1916. Fossil vertebrates from Florida: A new Miocene fauna; new Pliocene species; the Pleistocene fauna. Florida State Geological Survey Annual Report 8:79-119

Belongs to Osbornodon according to X. Wang 1994

Sister taxa: Osbornodon brachypus, Osbornodon fricki, Osbornodon renjiei, Osbornodon scitulus, Osbornodon sesnoni, Osbornodon wangi

Type specimens:

• Osbornodon iamonensis: USNM 8836, a maxilla (right maxillary fragment). Its type locality is Griscom Plantation, which is in a Miocene marine limestone in the Torreya Formation of Florida.
• Cynodesmus nobilis: FGS V5255, a mandible (partial left ramus).
• Paradaphoenus tropicalis: MCZ 3729, a maxilla (right maxillary fragment). Its type locality is Thomas Farm, which is in a Hemingfordian terrestrial sandstone/claystone in the Alachua Formation of Florida.

Ecology: ground dwelling carnivore-omnivore

Average measurements (in mm): P4 18.0 x 10.4, M1 11.9 x 14.4, M2 7.01 x 9.66, p4 11.9 x 6.3, m1 19.9 x 8.4, m2 9.94 x 6.27