E1U1R1Y4P3T1E1R1I1D2S1
17 points
EURYPTERIDS is validvalid
EURYPTERID,
EURYPTERID, any of an order of large extinct aquatic Paleozoic arthropods related to the horseshoe crab
EURYPTERID,
EURYPTERID, any of an order of large extinct aquatic Paleozoic arthropods related to the horseshoe crab