The letters at the end of a genus-group name (which must be, or be treated as, a singular noun in the nominative case - Article 11.8) which indicate the gender of the word;

• 一个属群名称(该名称必须是或必须被视为一个主格形式的单数名词-第11条8)的几个结尾字母，由此显示该字的性属;