Quote:
Originally Posted by
T4phage 
dwfii is correct
what you see is the
bilateral divide of the
back of the iguana..
the skin was 'split'
ie cut at the belly
to have a whole back
for the front of the shoe
eg. hornback
Again, I could be wrong, but experience tells me that just the opposite occurred--the vamp is belly.
Most lizards have some sort of crest or ruff along the back--something like the dorsal fin on a fish. Some reptile is cut such that the back is visible--hornback alligator, hornback lizard. But the effect is quite garish and the back tiles quite large and obvious.
As a result most reptile is cut
along the backbone, the hornback tiles removed, and the belly preserved to create the effect seen on these shoes.