寄生于海洋鱼类鳃上的两种锚首虫(包括一新种)的记述

Description of two species of Ancyrocephalidae(including one new species) parasiting in the gills of marine fishes

记述了寄生于鹦嘴鱼(Scarus sp.)鳃上的海盘虫属Haliotrema Johnston & Tiegs,1922一新种和寄生在金钱鱼(Scatophagus argu(L innaeus))鳃上的粗钩后海盘虫M etahalitrema geminatohamula Pan et al.;汕尾海盘虫,新种Haliotrema shanweii sp. nov. 的交接器的形状与Haliotrema dempsteri(Mizelle & Price,1964)Young,1968,H.ctenochaeti Young,1968,H.parahaliotrema(Mizelle & Price,1964)Young,1968,H.scari Young,1968,H.angelopterum Plaisance et al 2004和H.aurigae(Yamaguti,1968)Plaisance,2004相似,但也存在某些差异,此外,新种的中央大钩粗壮,内外突发达,不具膜孔,而除H.scari外的5种已知种外突不发达,且均具有膜孔.

This paper described two species of Ancyrocephalidae parasiting in the gills of Scarus sp. and Scatophagus argus（Linnaeus）. The specimens are deposited in the School of Life Sciences, Guangzhou University and the author. All measurements are in micrometer. Haliotrema shanweii sp. nov. （ Fig. 1 ： a, b, c, d） Host Scants sp. Localion Gills. Locality Shanwei（22. 8 N, 115.4 E ） ,Guangdong Province. Date Mar. , 2004. Type specimens Holotype Gdsw20040310-1 ,paratype Gdsw20040310-2-10 The size of the body is different, the differentia is big. Eyes four, haptor not clearly marked off from the body proper, with two pairs central anchors, two connective bars and seven pairs embryonic marginal hooklets dorsal hamuli similar size and shape to ventral, inner and outer roots developed, dorsal bar straight, posterior side with two rod shaped, bow-shaped, ventral bar rod shaped , an inverted broad U-shaped. Copulatory organ tubular, bent near base ; supporting apparatus is also bent, S-shaped, with a big platform-shaped base. Big body （ n = 3 ）, （710 - 770 ） × （ 90 - 110 ） in size. Pharynx elliptic, （ 38 - 43 ） × （ 38 - 48 ） in size. Opisthohapter （70- 75） × （55 -75）in size, marginal hooklet 13 in length. Dorsal central hamuli 65 -83 in total length, basal portion 55 - 63, point 13 - 14, inner root 33 - 43, outer root 15 - 18. Ventral central hamuli 75 -90 in total length,basal portion 60, point 13 - 14,inner root 30 - 38, outer root 13 × 15. Dorsal connective bar （55 -73） × （3 -4） in size; Ventral connective bar （58 -63） × 9. Copulatory tube 83 -88, supporting apparatuo 80-85. The base （30-38） × （30-53）. Small body（n =7）, （480 -570 ） × （45 -75）in size. Pharynx elliptic, （35 -43） × （30 -40） in size. Opisthohapter （60 -75 ）× 35 in size, marginal hooklet 10 - 13 in length. Dorsal central hamuli 53 -60 in total length, basal portion 40 -48, point 11 -13, inner root 18 -23, outer root 13 -15. Ventral central hamuli 53 -63 in total length,basal portion 41 -50, point 11 -14, inner root 15- 18, outer root 6-8. Dorsal connective bar （40-50） × （3-4） in size; Ventral connective bar （40-50）×（6-8）. Copulatory tube 68 75, supporting apparatuo 50 - 63. The base （ 15 -20） × （ 15 -23）. Remarks. The morphology of the copulatory organ in the new species is similar to that of Haliotrema dempsteri （ Mizelle ＆ Price, 1964） Young, 1968,H. ctenochaeti Young, 1968, H. parahaliotrema （ Mizelle ＆ Price, 1964） Young,1968, H. scari Young, 1968, H. angelopterum Plaisance et al 2004 and H. aurigae （Yamaguti, 1968 ） Plaisance ,2004, but supporting apparatus differs from H. dempsteri, H. ctenochaeti and H. parahaliotrema, the base of copulatory tube and supporting apparatus differ from H. scari, central anchors and connective bar also differ from the known species except H. scari. Etymology The specific name is from locality of collect specimens.