For relationship of projecting part of forehead to sex and age, most of male H. armiger(72%) has projecting p art of forehead, but some of female (21.1%) has it too .

 
  • 从皮叶与性别和年龄的关系可见,具皮叶者多数为雄性(72%25),但雌性亦有21.;1%25的个体有皮叶。
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