Desmostylus

Desmostylus is an extinct genus of herbivorous mammal that lived from the Late Oligocene to the Late Miocene.It had a very wide range,and its fossils have been found in the coasts of Mexico,USA and Japan.It was named by Othniel C. Marsh in 1888.

Description
Desmostylus was an hipoppotamus-like creature of about 1.8 metres (6 ft) long which weighed about 200 kilograms (440 lb). It had a short tail and powerful legs with four hooves. Both the creature's jaws were elongated and sported forward-facing tusks, which were elongated canines and incisors. Most likely  amphibious ,  Desmostylus  is thought to have lived in shallow water in coastal regions. Some paleontologists   have argued it may have fed on  seaweed  during  low tide. However, recent isotope work indicates that  Demostylus  more likely lived (or spent a large amount of time) in freshwater or  estuary  ecosystems foraging for aquatic freshwater plants.

Species
D. hesperus  (synonyms and invalid names:  D. watasei ,  D. cymatias ,  D. californicus, D. mirabilis ,  D. minor ,  Desmostylella typica ), D. coalingensis  (syn.  Vanderhoofius coalingensis ), D. japonicus.

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