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
This disambiguation page lists articles associated with the same abbreviated species scientific name.
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