|Named By:||Othniel Charles Marsh in 1888|
|Location:||Pacific coastlines of North America, Russia and Japan|
|Size:||1.8 meters long|
|Classification:||| Chordata | Mammalia | Paenungulata | Desmostylia | Desmostylidae ||
|Also known as:||| Desmostylella | Vanderhoofius coalingensis ||
Desmostylus is an extinct genus of herbivorous mammal of the family Desmostylidae living from the Chattian stage of the Late Oligocene subepoch through the Late Miocene subepoch (28.4 mya--7.250 Mya) and in existence for approximately 21.2 million years.