In Peru there are reports of a big cat the size of a jaguar or larger that is tannish-colored and has stripes similar to those of a tiger. The missionary and wildlife researcher Peter Hocking has allegedly come to possess a skull from one of these "striped tigers."
The zoologist Darren Naish says that the skull of the striped tiger does not appear to be from a jaguar, nor from a true tiger from Asia. He suggests that the striped tiger of Peru may be a bona fide new species of big cat.
Read Darren Naish's blog about this cryptid here
Note: I do not necessarily agree with Naish's suggestion that this is a new species. I find it likely that the specimen was in fact a normal Asian tiger. But it's fun to imagine!