Platanaster

• Platanaster ('plate star') is an extinct genus of sea star.

Taxonomy

†Palasteriscidae

• †Urasterellinae
  • †Cnemidactis
    • †C. girvanensis
  • †Urasterella
    • †U. asperrimus
• †Palasteriscinae
  • †Lanthanaster
    • †L. cruciformis
  • †Platanaster
    • †P. ordovicus
  • †Baliactis
    • †B. ordovicus