P. silvestrii

P. silvestrii may refer to:
 * Paruroctonus silvestrii, the California common scorpion
 * Paulownia silvestrii, a plant species in the genus Paulownia
 * Pegoscapus silvestrii (Grandi), a fig wasp species in the genus Pegoscapus
 * Philodromus silvestrii, Caporiacco, 1940, a crab spider species in the genus Philodromus and the family Philodromidae found in Somalia
 * Pseudobiantes silvestrii, Mello-Leitão, 1944, a harvestman species in the genus Pseudobiantes and the family Epedanidae
 * Pseudotyrannochthonius silvestrii, Ellingsen, 1905, a pseudoscorpion species in the genus Pseudotyrannochthonius and the family Chthoniidae found in Chile