成虫形态 虫体中型,体长0.385-0.566mm,体宽0.054-0.217mm。封片上有时在虫体前端见到四团黑色素堆,有时色素分散,有时缺如。咽卵圆形0.025-0.051×0.020-0.061mm。后吸器与体前部区分明显,大小0.037-0.074×0.029-0.135mm。边缘小钩7对,均为胚钩型,长0.011-0.018mm。中央大钩具腱韧带。背中央大钩呈B.pseudobagri型,侧面有一小突起,钩尖转折明显,全长0.029-0.034mm,钩尖长0.009-0.012mm,K值为1.2-1.5。背联结片单一,菱形,中间围有一孔0.010-0.015×0.029-0.051m...