Nyiman

The Nyima are a proud warlike tribe of anthropomorphic lions featured in Finder. The race takes its name from its female members, the males are called uluhaka. Nyima society functions like a real-world pride does, in that there is one male king. All Nyima are born non-morphic, but the females develop their anthropomorphism due to a carrier virus from their king. All other male uluhaka remain in their non-morphic form.

Reference
Finder: King of the Cats TPB