Found this great article about a very strange sounding creature from 100 million years ago.
The discovery of the bizarre, lanky creature had mammal-like teeth and skinny legs shows that bony plated reptiles were once far more diverse than
they are today.
It enjoyed land-based lifestyle on the African floodplains far removed from its aquatic descendants, preying on dragon flies and other insects and
small animals.
The new species' fossilised remains were dug up from 105 million year old rock by palaeontologists scouring a river bank in Tanzania
Unfortunately at the minute I cannot find any concept drawings, but here is a youtube video that sums up the structure of the teeth;
Here's another link to the story but with a visualisation of the species. As I understand they have uncovered very little of the remains so this
could be another Iguanodon fiasco...