Desmostylia

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iDesmostylia
Fossil range: OligoceneMiocene
Paleoparadoxia
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Desmostylia
Reinhart, 1953
Families and genera

Family Desmostylidae
  Behemotops
  Desmostylus
Family Paleoparadoxiidae
  Ashoroa
  Paleoparadoxia

The Desmostylia are an extinct order of marine mammals comprising four genera, known from late Oligocene and Miocene fossil records. Dental and skeletal form suggests desmostylians were amphibious herbivores dependent on littoral (seashore) habitats. Their closest living relatives are the Proboscidea (elephants) and Sirenia (manatees), so they belong to the cohort Afrotheria.

Desmostylians grew to 1.8 metres in length and are thought to have weighed more than 200 kg. The type species Desmostylus was first described by American paleontologist Othniel Charles Marsh in 1888. Desmostylus derives from the Greek words desmos, meaning "bond" and stylos, meaning "column" or "pillar."

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