| Arnoldius | |
|---|---|
 | |
| Arnoldius flavus worker from Australia | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Clade: | Pancrustacea |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Dolichoderinae |
| Tribe: | Bothriomyrmecini |
| Genus: | Arnoldius Dubovikov, 2005 |
| Type species | |
| Bothriomyrmex flavus Crawley, 1922 | |
| Diversity | |
| 3 species | |
Arnoldius is a genus of ants in the subfamily Dolichoderinae. Its three species are known from Australia.
