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Noun: order Spatangoida
  1. Heart-shaped sea urchins
    - Spatangoida

Type of: animal order

Part of: class Echinoidea, Echinoidea

Nearest

order Scorpionida
order Scrophulariales
order Secotiales
order Selaginellales
order Siluriformes
order Siphonaptera
order Siphonophora
order Sirenia
order Solenichthyes
order Solenogastres
order Spatangoida
order Sphaeriales
order Sphaerocarpales
order Sphagnales
order Sphenisciformes
order Spirochaetales
order Squamata
order Stegocephalia
order Stereospondyli
order Stomatopoda
order Strigiformes