Question

Why
Characters delimiting a family are more in general than those delimiting a genus

Answer 1

The International Committee on Taxonomy of Viruses (ICTV) authorizes and organizes the taxonomic classification of and the nomenclatures for viruses.[1][2][3] The ICTV have developed a universal taxonomic-scheme for viruses, and means to describe, name, and classify every virus that affects living organisms. The members of the International Committee on Taxonomy of Viruses are considered expert virologists.[4] The ICTV was formed from and is governed by the Virology Division of the International Union of Microbiological Societies.[5] Detailed work, such as delimiting the boundaries of species within a family, typically is performed by study groups of experts in the families.[2]

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