Why do animal family names often end in -idae?
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Zoology
Blue wildebeests (Connochaetes taurinus) drinking at the water's edge, Masai Mara, Kenya.
In zoology, the suffix -idae is used to denote a family of animals. This naming convention is derived from New Latin, which itself traces back to the Greek suffix -idai, the plural form of -idēs.1
In scientific classification, family names are formed by taking the name of the type genus and appending the suffix -idae. For example, the family name Felidae (cats) or Aphididae (plant lice) indicates that the group consists of members belonging to that specific family. This standardized system helps biologists categorize and organize the vast diversity of life into consistent, hierarchical groups.231