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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Agnostida
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Agnostidae
Calodiscidae
Clavagnostidae
Condylopygidae
Diplagnostidae
Eodiscidae
Hastagnostidae
Hebediscidae
Metagnostidae
Peronopsidae
Phalacromidae
Pseudagnostidae
Ptychagnostidae
Sphaeragnostidae
Spinagnostidae
Tsunyidiscidae
Weymouthiidae
Yukoniidae
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