ecofactbook
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species
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Animalia
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Arthropoda
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Trilobita
/
Asaphida
/
Nileidae
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Nileus
/
Nileus affinis
Nileus depressus
Nileus hesperaffinis
Nileus macrops
Nileus orbiculatoides
Nileus porosus
Nileus scrutator
Nileus walcotti
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Nileus affinis