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Noun1.Spatangoida - heart-shaped sea urchins
animal order - the order of animals
class Echinoidea, Echinoidea - sea urchins and sand dollars
heart urchin - sea urchin having a heart-shaped body in a rigid spiny shell
References in periodicals archive ?
Superorder Atelostomata Order Spatangoida Suborder Micrasterina Family Spatangidae Genus Spatangus GRAY, 1825 Spatangus corsicus DESOR P1.
Spatangoida (II) - Amphisternata (II) - Spatangidae, Loveniidae, Pericosmidae, Schizasteridae, Brissidae.
Why do the Echinoida and the Spatangoida have glycine-rich repeats in the regions flanking the core, while other orders do not?