P. maximus

P. maximus may refer to:
 * Paralongidorus maximus, a plant pathogenic nematode species
 * Pecari maximus, the giant peccary, a possible fourth species of peccary, discovered in Brazil
 * Pecten maximus, the great scallop or king scallop, an edible saltwater clam species
 * Physalaemus maximus, a frog species endemic to Brazil
 * Prosaurolophus maximus, a hadrosaurid dinosaur species from the Late Cretaceous of North America
 * P maximus, a former alias of one Phineas D.M, music producer, writer, singer, pianist and master beat writer.