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Palavras-chave
estudos citogeneticos rodentia marsupial bats rodentia echimyidae cricetidae sigmodontinae proechimys iheringi small mammal echimyidae mamiferos didelphimorphia didelphidae cricetidae cranial didelphis aurita rodent spiny rats brasil rodentia cricetidae rodentia sigmodontinae morphological phylogenetic cerradomys oligoryzomys opossum species brazilian genus sigmodontinae variation atlantic forest