polyprotodont การใช้

• All members of the order are polyprotodont ( have several pairs of lower front teeth ) & mdash; in the case of the Peramelemorphia, three pairs.
• ""'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.
• :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.
• 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.