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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Phacopida
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Pterygometopidae
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Achatella
Calliops
Calyptaulax
Chasmops
Denella
Eomonorachus
Eophacops
Estoniops
Isalaux
Kainops
Pterygometopus
Sceptaspis
Tricopelta
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