S. giganteus may refer to:
- Shantungosaurus giganteus, a flat headed hadrosaurid dinosaur species
- Spalax giganteus, the giant mole rat or Russian mole rat, a rodent species found in Kazakhstan
- Spirobranchus giganteus, the Christmas tree worm, a small tube-building polychaete worm species
This disambiguation page lists articles associated with the same abbreviated species scientific name.
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