411 REFERENCE · Wiktionary
Euechinoidea
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
Translingual
right|thumb|Echinus esculentus species
Etymology
From mul la-new eu- true + Echinoidea class.
Proper noun
subclass class Echinoidea most extant sea urchins
Hypernyms
subclass
Hyponyms
subclass Atelostomata superorder (includes the heart urchins), Diadematacea superorder (sea urchins with hollow spines), Echinacea (sea urchins with solid spines and rigid test), Gnathostomata (includes the sand dollars) superorders
Acroechinoidea infraclass, Carinacea infraclass, Irregularia infraclass - infraclasses
Coordinate terms
subclass Cidaroidea subclass
References
149854 1