All members of the order are polyprotodont ( have several pairs of lower front teeth ) & mdash; in the case of the Peramelemorphia, three pairs.
2.
""'Wynyardia bassiana " "', an extinct possum-like marsupial from the early Miocene of Wynyard in Tasmania, has long been considered to display skeletal features that are intermediate between the primitive polyprotodont and the advanced diprotodont marsupials.
3.
:When Stirling ( 1888 ) initially was unable to find the epipubic bones in marsupial moles, speculation was rife : the marsupial mole was a monotreme, it was the link between monotremes and marsupials, it had its closest affinities with the ( placental ) golden moles, it was convergent with edentates, it was a polyprotodont diprotodont, and so on.
4.
Attempts to resolve this puzzle include the view that the bandicoot group evolved from the carnivores, retaining the polyprotodont dentition, and independently evolving a syndactyl hind foot; the contrary view that syndactyly is so unusual that it is unlikely to have evolved twice and therefore the bandicoot group must have evolved from a possum-like diprotodont creature, and re-evolved its extra teeth.
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