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O genero Maranhites e um importante fossil do Devoniano. As formas dotadas de grande numero de estruturas perifericas sao exclusivas do Devoniano Superior, atingindo a base do Carbonifero. Aquelas com menos de quinze elementos perifericos, embora abundantes no Devoniano Superior, atingem o Devoniano inferior. As especies mais abundantes, comuns ao Devoniano Superior de todas as bacias paleozoicas do Brasil, ja foram assinaladas, dentre outras localidades, no sul de Gana e no Saara da Argelia.

Maranhites, um importante fóssil índice do Devoniano Superior (Acritarcha Scutellomorphitae)