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Why do zoological family names often end in -idae?
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taxonomy
Animals and other organisms are classified within a succession of nested groups that ranges from the general to the particular.
In zoological taxonomy, the suffix -idae is used to denote the rank of a family. This naming convention is mandated by the international code of zoological nomenclature, which establishes standardized endings to ensure clarity and consistency across the classification of animals.1
Etymologically, the suffix is derived from the New Latin -idae, which originates from the Greek -idai, the plural form of -idēs. When naming a family, this suffix is typically appended to the stem of the name of the type genus. For example, the family Felidae is named based on the genus Felis. This system helps biologists maintain a structured and organized hierarchy when classifying organisms.231