中国海洋鱼类单殖吸虫研究XXV．单杯科二新记录种
Monogenea of Chinese Marine Fishes XXV． Two New Chinese Records Species of Monocotylidae

记述采自广东汕尾软骨鱼类鳃上的2种单杯科单殖吸虫：三睾单杯虫(Monocotyle tritestis Young, 1967)和凯西单杯虫(Monocotyle caseyae Chisholm & Whittington, 2005)． 所获的三睾单杯虫标本与YOUNG (1967)的原始描述基本一致，但中央大钩的长度、后吸器脊片的形状略有不同；凯西单杯虫标本与CHISHOLM & WHITTINGTON (2005)的原始描述基本相同，但虫体后部的6个附加结构未见. 三睾单杯虫和凯西单杯虫均为我国新记录种，赤魟和尖吻魟分别为其宿主新记录．
： Monocotyle tritestis Young, 1967 and M． caseyae Chisholm & Whittington, 2005 are described from the gills of elasmobranch fishes collected from Shanwei, Guangdong, off the South China Sea． M． tritestis is basically consistent with the original description of Young (1967) except for the length of hamulus and the shape of sclerites which between on the inner rings and radial septa． M． caseyae is basically in accord with the original description of Chisholm & Whittington (2005), but the six structures on dorsal surface of posterior body region was not observed in our specimens． This is the first time that M． tritestis and M． caseyae reported in China, and the fish Dasyatis akajei and Dasyatis zugei are new hosts, respectively