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Palavras-chave
preliminares cariotipo spiny rats cricetidae rodentia echimyidae cricetidae sigmodontinae rodentia sigmodontinae small mammal brazilian oligoryzomys echimyidae opossum proechimys iheringi perciformes trinomys rato variation karyotype janeiro chiroptera especie estudos citogeneticos mamiferos proechimys didelphimorphia didelphidae species genus brasil brazil rodentia cricetidae