![http://www.mun.ca/biology/scarr/Multituberculata_skull.gif](Multituberculata_skull.gif)
Multituberculate
dentition
The Multituberculata
are an extinct order of Mammals characterized by
unusual molariform teeth with multiple cusps and ridges,
unlike modern placental mammals whose molars are variations
on a four-cusp pattern. The anterior dentition resembles
that of modern rodents, and the multituberculates are
assumed to have had a similar niche. Multituberculates were
the longest-lived mammalian order, extending 160MYr from the
origin of mammals in the Jurassic until the radiation
of rodents during the Eocene.