P. formosa may refer to:
Parahebe formosa, a plant endemic to Tasmania Partula formosa, an extinct snail Pempelia formosa, a snout moth Phryganopteryx formosa, a Malagasy moth Phylloxiphia formosa, an African moth Pipreola formosa, a bird endemic to Venezuela Pitcairnia formosa, a New World plant Pleurotomella formosa, a sea snail Poecilia formosa, a freshwater fish