Acastidae
| Acastidae Temporal range:  | |
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| Coltraneia oufatenensis | |
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Arthropoda | 
| Class: | †Trilobita | 
| Order: | †Phacopida | 
| Suborder: | †Phacopina | 
| Superfamily: | †Acastoidea | 
| Family: | †Acastidae Delo, 1935 | 
| Subfamilies | |
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Acastidae is a family of trilobites in the order Phacopida, suborder Phacopina, superfamily Acastoidea, containing the following genera:
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