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Re: Australian mammal remains
>>The specimen is a placental, possibly the worlds oldest. It is not a rodent
>>which are relatively advanced mammals. The specimen cosists of a lower jaw
>>with premolars and molars still attached. As always, the Science Show on
>>Radio National gace tyhe best coverage.
>Stupid (but probably very common) question. What is it about half a lower
>jaw that tells you its a placental mammal?
The arangement of cusps (the bumps of the teeth) are quite distinctive and
diagnostic for most mammal groups.
Dr Paul M.A. Willis
Consulting Vertebrate Palaeontologist
Quinkana Pty Ltd