Plectorthoidea
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A superfamily of brachiopods containing:
- Family Plectorthidae
- Family Cremnorthidae
- Family Cyclocoeliidae
- Family Eoorthidae
- Family Euorthisinidae
- Family Finkelnburgiidae
- Family Giraldiellidae
- Family Phragmorthidae
- Family Platystrophiidae
- Family Ranorthidae
- Family Rhactorthidae
- Family Tasmanorthidae
- Family Wangyuiidae