S. crassa may refer to: Sarcosphaera crassa, the only species in the Sarcosphaera genus of fungi Scolopendra crassa, species of centipede Shorea crassa, species of plant Strigocossus crassa, species of moth Sarcohyla crassa, species of frog in the family Hylidae Sertularella crassa, branching colonial hydroid Sphenophryne crassa, species of frog in the family Microhylidae Sannantha crassa, species in the myrtle family