Xylacanthus may refer to:
- Xylacanthus (fish), a genus of fossil Acanthodii in the family Ischnacanthidae
- Xylacanthus (plant), a genus of flowering plants in the family Acanthaceae
This disambiguation page lists articles about distinct genera with the same name.
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If an internal link led you here, you may wish to change the link to point directly to the intended article.