ecofactbook
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species
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Animalia
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Echinodermata
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Echinoidea
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Phymosomatoida
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Phymosomatidae
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Phymosoma
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Cyphosoma baylei
Phymosoma binexilis
Phymosoma bybeei
Phymosoma dixie
Phymosoma granulosum
Phymosoma hexaporum
Phymosoma mexicanum
Phymosoma paynei
Phymosoma peloria
Phymosoma trinitensis
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Cyphosoma baylei