S. tonkinensis may refer to:
- Scaphis tonkinensis, an air-breathing sea slug species
- Sindora tonkinensis, a legume species found in Cambodia and Vietnam
- Sinogastromyzon tonkinensis, a ray-finned fish species
- Sophora tonkinensis, a plant species used in traditional Chinese medicine.
- Strobilanthes tonkinensis, a species of herbaceous plant used as a flavoring for tea native to Southeast Asia
This disambiguation page lists articles associated with the same abbreviated species scientific name.
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