Definify.com
Webster 1913 Edition
Echinoidea
‖
Echˊi-noi′de-a
,Noun.
pl.
(Zoöl.)
The class Echinodermata which includes the sea urchins. They have a calcareous shell, usually more or less spheroidal or disk-shaped, composed of many united plates, and covered with movable spines. See
Spatangoid
, Clypeastroid
. [Written also
Echinidea
, and Echinoida
.] Definition 2024
Echinoidea
Echinoidea
Translingual
Proper noun
Echinoidea
- A taxonomic class within the phylum Echinodermata – the sea urchins and sand dollars.[1]
Hypernyms
- (class): Animalia - kingdom; Eumetazoa - subkingdom; Bilateria, Nephrozoa - clades; Deuterostomia - superphylum; Echinodermata - phylum; Echinozoa - subphylum
Hyponyms
- (class): Euechinoidea (almost all extant species), Perischoechinoidea (primitive and extinct sea urchins) (subclasses)
OR
- (class per Ruggiero): Cidaroidea, Euechinoidea - subclasses
References
- ↑ Ruggiero MA, Gordon DP, Orrell TM, Bailly N, Bourgoin T, Brusca RC, et al. (2015) A Higher Level Classification of All Living Organisms. PLoS ONE 10(4): e0119248. doi: 10.1371/journal.pone.0119248. pmid:25923521