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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Amecephalina
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Amecephalina bella
Amecephalina convexa
Amecephalina coosensis
Amecephalina curticei
Amecephalina poulseni
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Amecephalina bella