四种锚首虫科包括一新种的描述(单殖纲:指环虫目:锚首虫科)

FOUR SPECIES OF ANCYROCEPHALIDAE,WITH DESCRIPTION OF A NEW SPECIES (MONOGENEA: DACTYLOGYRIDEA: ANCYROCEPHALIDAE)

本文报道采自广东阳江闸坡中华海鲶鳃上的锚首虫科四个虫种。包括一新种瘤钩小沙汉虫Chauhanellustuberhamatussp．nov.。它以背中央大钩钩尖基部内侧具瘤状结构而区别于本属已记述的21个种。其余为弯曲小沙汉虫C．flexiosus、海鲶血梗虫Hamatopedunculariaarii、和简单血梗虫H．simplex。

This paper deals with four species of ancyrocephalids belonging to two different genera collected from the gills of a sea catfish, Arius sinensis (Lacepede), from Yangjiang (111°49′E, 21°34′ N), Guangdong Province, South China Sea. Among them one is new species and the other three are known species: Chauhanellus flexiosus Bychowsky et Nagibina, 1969, Hamatopedunculari arii Yamaguti, 1953 and H. simplex Bychowsky et Nagibina, 1969.All syntype-specimens of the new species are deposited in the Department of Biology, South China Normal University. All measurements are expressed in millimeters.