• Thumbnail for Starfish
    Valvatida and Velatida and two extinct ones, Calliasterellidae and Trichasteropsida. Living asteroids, the Neoasteroidea, are morphologically distinct...
    104 KB (11,276 words) - 19:10, 17 April 2024
  • Thumbnail for List of echinoderm orders
    Valvatacea Notomyotida Paxillosida Valvatida Velatida † Calliasterellidae † Trichasteropsida Xyloplax janetae (Peripodida) Novodinia antillensis (Brisingida) Pisaster...
    10 KB (468 words) - 04:45, 24 June 2023