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-aceae f pl
- A family name is formed from the name of a genus that belongs to the family by substitution of the ending of the genitive singular form with "-aceae".
- There are only eight exceptions to the rule of using the -aceae termination for taxonomic families under the International Code of Nomenclature for algae, fungi, and plants (Melbourne Code, 2011), for a few widely used names that pre-date the rule. Each also has an accepted alternative (nomen alternativum), given in brackets:
- In English, family names ending in -aceae are usually treated as plural (e.g., "Cunoniaceae are" or "the Cunoniaceae family is").
- In English, most family names ending in -aceae follow the pronunciation patterns of /ˈeɪsi, -siˌaɪ, -siˌeɪ, -siˌi/) (e.g., Solanaceae, /ˌsoʊləˈneɪsi/).
- -idae (the equivalent for animals)
- Translingual: -aceae