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. Chordata (phylum)
8. Vertebrata (subphylum)
9. Mammalia (class)

Additional parents:

1. top of the aat hierarchies
2. Agents Facet
3. Living Organisms
4. living organisms
5. Eukaryota
6. Animalia
7. Chordata
8. Vertebrata
9. Mammalia
10. Monotremata

Anotations

Scope note:

With the platypus, Tachyglossa are the only egg-laying mammals. The female lays a single soft-shelled, leathery egg, deposits it directly into her pouch, where there are no nipples, but after hatching the young echidna sucks milk from the pores of the two milk patches.