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)
7. Mollusca (phylum)
8. Bivalvia (class)
9. Pteriomorphia (subclass)
10. Ostreoida (order)
11. Spondylidae (family)

Narrower term/s

• Spondylus calcifer (species)
• Spondylus princeps (species)

Anotations

Scope note:

Genus of bivalve mollusks, characterized by foliaceous spines. They are used for edible meat and for their decorative shells. Although some common names include the word "oyster," they are not closely related to true oysters (in the family Ostreidae).