ecofactbook
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species
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Animalia
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Arthropoda
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Trilobita
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Ptychopariida
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Alokistocaridae
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Parehmania
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Parehmania arcuata
Parehmania concava
Parehmania kwaguntensis
Parehmania nitida
Parehmania princeps
Parehmania quadrata
Parehmania storeyi
Parehmania tontoensis
Parehmania ulrichi
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Parehmania arcuata