N. exigua may refer to:
- Nassula exigua, a ciliate protist
- Nectriella exigua, a sac fungus
- Neopetrosia exigua, a marine sponge
- Nicotiana exigua, a tobacco plant
- Nucula exigua, a nut clam
- Nymphoides exigua, an aquatic plant
This disambiguation page lists articles associated with the same abbreviated species scientific name.
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