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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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Catillicephalidae
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Acheilops
Acheilus
Buttsia
Calculites
Catillicephala
Distazeris
Onchonotus
Pemphigaspis
Stenochilina
Theodenisia
Triarthropsis
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Acheilops