Hierarchy classification:

1. top of the aat hierarchies
2. Agents Facet
3. Living Organisms (hierarchy name)
4. living organisms (entities)
5. Eukaryota (domain)
6. Animalia (kingdom)

Anotations

Scope note:

Bottom-dwelling marine invertebrates characterized by being covered by two valves or shells, with one valve covering the dorsal or topside and the other covering the ventral or bottom side; commonly known as lamp shells because they resemble early Roman oil lamps.