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#macropetalichthyidae #armored fish #petal fish #extinct fish #placoderm head shield #petalichthyida

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#macropetalichthyidae #fossil fish #petal fish #extinct fish #placoderm #petalichthyida #devonian fish

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#macropetalichthyidae #petal fish #ancient fish #devonian period #extinct fish #placoderm #petalichthyida