Physa aridi is a fossil species of air-breathing freshwater snail, an extinct aquatic pulmonate gastropod mollusc in the family Physidae. This species has a small, left-handed (or sinistral) shell, as is always the case in this family. Physa aridi dates from the Senonian (Upper Cretaceous) of the Bauru Group, in São Paulo state, Brazil.[1]
| Physa aridi Temporal range:
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|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Superorder: | Hygrophila |
| Family: | Physidae |
| Genus: | Physa |
| Species: | †P. aridi
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| Binomial name | |
| †Physa aridi Mezzalira, 1974[1]
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References
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