寄生于鲫的锚首虫一新种

THE REPORT OF A NEW SPECIES OF ANCYROCEPHALID(MONOGENEA)FROM CARASSIUS AURATUS IN CHINA

文章报道了寄生于鲫(Carassius auratus)鳃部的锚首虫一新种,鲫锚首虫(Ancyrocephalus carassii sp.nov.)。该虫几丁质结构与寄生于鳜(Siniperca chuatsi)的河鲈锚首虫(A.mogurndae)在整体上很相似,尺寸略大,但鲫锚首虫的背联结棒上有两个突起,背中央大钩基部较后者更粗壮,且在近钩顶处有一明显的小凹。这是首次在鲫上发现锚首虫科(Ancyrocephalidae)单殖吸虫的寄生。

This study reported a new monogenean species,Ancyrocephalus carassii sp.Nov,isolated from gills ofCarassius auratus purchased in the Weigang Market,Nanjing,China.Its body length and width are1.12mm and0.32mm,respectively.Opisthohaptor consists of7pairs of embryonic marginal hooklets,2pairs of anchors and2connectiveplates.Total length of dorsal anchor,shaft,point,and inner root are0.073mm,0.056mm,0.028mm,and0.035mm,respectively,and outer root is not obvious.Total length of ventral anchor,shaft,point,inner root,and outerroot are0.059mm,0.047mm,0.02mm,0.03mm,and0.012mm,respectively.The size of dorsal connective plate andventral connective plate are0.015mm×0.1mm and0.014mm×0.078mm,respectively.Total length of marginal hookletis0.025mm,with its point being0.007mm and the shaft being0.016mm.Thin-long copulatory tube winds up.It isabout0.256mm in length while it’s bulb-like root is0.012mm in diameter,and its supporting apparatus is about0.033mm in length.Vagina coiling is0.119mm in length,and its trumpet-like opening that connects with supportingapparatus is about0.45mm.The chitinous structure of this species is pretty similar to those of A.mogurndae on Sinipercachuatsi,suggesting a relative relationship between the two species of Ancyrocephalus.This is the first report of ancyrocephalid on C.auratus.