Placozoa

Etymology
, from stem of  +

Proper noun

 * 1) Balloon-like marine animals, the placozoans, believed to be the simplest organism in Animalia.

Hypernyms

 * - superkingdom; Animalia - kingdom

Hyponyms

 * - sole class; - sole family;  - sole accepted genus;  - sole accepted species

Coordinate terms

 * Cnidaria, Ctenophora,