A genus of echinoid Echinoderms, allied to the common sea urchin, but having mouth and vent both below.
| 单词 | θ33468 | 
| 释义 | the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > 			[noun]		 > subphylum Eleutherozoa > class Echinoidea > order Clypeastroidea > member of > genus or member of genus Clypeaster (2)		 Clypeaster1836 A genus of echinoid Echinoderms, allied to the common sea urchin, but having mouth and vent both below. clypeastroid1877  | 
	
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