clasper

clasp.er

n.（名词）
One that clasps.
紧抱的人
Any of the appendages of the male of certain insects and crustaceans that are used during copulation to hold the female.
抱握器：一种雄性昆虫或雄性甲壳类动物的悬垂物，在交配中用来持住雌性
A posterior extension on each of the pelvic fins of male elasmobranch fishes that aids in the transmission of sperm during copulation.
交合突，鳍脚：雄性板腮亚纲鱼的每支腹鳍的前端延伸，在交配中辅助精子的传递