Platanaster
Platanaster is an extinct genus of sea stars.
Taxonomy
†Palasteriscidae- †Urasterellinae
- *†Cnemidactis
- **†C. girvanensis
- *†Urasterella
- **†U. asperrimus
- †Palasteriscinae
- *†Lanthanaster
- **†L. cruciformis
- *†Platanaster
- **†P. ordovicus
- *†Baliactis
- **†B. ordovicus