Platyceratoidea
| Platyceratidae Temporal range: Middle Ordovician–Permian |
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| Conical platyceratid gastropod (Palaeocapulus acutirostre) attached to a crinoid (Mississippian of Ohio) | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Superfamily: |
†Platyceratoidea Hall, 1879 |
| Family: |
†Platyceratidae Hall, 1879 |
Platyceratidae is an extinct family of Paleozoic sea snails, marine gastropod mollusks. This family may belong in the Patellogastropoda or the Neritimorpha. The platyceratid gastropods are known for the complex symbiotic relationships they had with crinoids.
This is the only family in the superfamily Platyceratoidea.
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