An eurypterid can be prehistoric.Logical formLearned from35 sentences. A genus can be constituted-of-or-filled-with eurypterid.Logical formLearned from28 sentences. A family can be constituted-of-or-filled-with eurypterids.Logical formLearned from7 sentences. Eurypterids can be extinct.Logical formLearned from6 sentences. A superfamily can be constituted-of-or-filled-with eurypterids.Logical formLearned from3 sentences. Eurypterids can be prehistoric.Logical formLearned from3 sentences. Eurypterids can be scorpions.Logical formLearned from3 sentences. Some resemblance can be to eurypterids.Logical formLearned from2 sentences. Eurypterids can be fossil.Logical formLearned from2 sentences. A tail may be spiked in eurypterids.Logical formLearned from2 sentences. A head may pertain-to eurypterids.Logical formLearned from2 sentences. Eurypterids can be creatures.Logical formLearned from2 sentences. (Sea scorpions) may be knowned as eurypterids.Logical formLearned from2 sentences. An eurypterid can be bizarre.Logical formLearned from2 sentences. An eurypterid can be similar to species.Logical formLearned from2 sentences.