锚首虫科(单殖亚纲)两新种的记述

DESCRIPTION OF TWO NEW SPECIES OF ANCYROCEPHALIDAE (MONOGRNOIDEA)

记述了寄生于紫红笛鲷Lutjanusargentimaculatus(Forskai)鳃上的宽海盘虫属EuryhaliotremaKrit-sky&Boeger,2002一新种和海盘虫属HaliotremaJohnston&Tiegs,1922一新种.广东宽海盘虫,新种Eury-haliotremaguangdongensissp.nov.的中央大钩的形状和量度与Euryhaliotremacarbunculu(Hargis,1955)Kritsky&Boeger,2002相似,新种的交接管和已知种的交接管均为环状,但新种交接管环绕8～9圈,已知种只有2圈,支持器的结构及量度差异较大.南澳海盘虫,新种Haliotremananaoisp.n.的中央大钩和联结片的形态相似于真黑鲷海盘虫HaliotremaeukurodaiZhangetal.,1995,但新种的中央大钩量度较小,交接管基部膨大呈球状,中间直,远端微呈"S"的细长管,而已知种交接管为粗状弓曲,呈"C"形,且新种的交接管的据弯度长(125～146)为已知种(60～70)的2.1倍;此外新种未见有支持器,而已知种有支持器.

This paper described two new species of Ancyrocephalidae,one new species of Euryhaliotrema Kritsky & Boeger,2002 and one new species of Haliotrema Johnston & Tiegs,1922,parasiting in the gills of Lutjanus argentimaculatus(Forskai).The morphology and measurement of two central hamuli in Euryhaliotrema guangdongensis sp.nov.is similar to that of Euryhaliotrema carbunculu(Hargis,1955)Kritsky & Boeger,2002.Copulatory tube of two species is loop-shaped,with 8～9 loop in the new species,but only 2 loop in the known species.Morphology and measurement of supporting apparatus in the new species is obviously different from those of the known species.The morphology of two central hamuli and connective bar of Haliotrema nanaoensis sp.nov.is similar to that of Haliotrema eukurodai Zhang et al.,1995,but measurement of the new species is smaller.Basal portion of copulatory tube in the new species is inflated,ball-shaped,straight in middle,distal portion slightly 'S-shaped',long and thin tube,but those of the known species is brawny,'C-shaped',and the total length including curve of copulatory tube of the new species(125～146) is longer than those of the known species(60～70) by 2.1,but no in the new ones;and with supporting apparatus in the known species.