Orthothecida
| Orthothecida Temporal range: Early Cambrian – Early Devonian |
|
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Informal group: | Lophophorata |
| Class: | †Hyolitha |
| Order: | †Orthothecida |
| Family: |
†Orthothecidae Marek, 1966 |
| Genera | |
|
See text |
|
See text
The orthothecids are one of the two hyolith orders.
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