摘要
记述了寄生于广东海洋鱼类黄唇裸颊鲷Lethrinus xanthochilus(Klunzinger),弱棘眶棘鲈Scolopsis eriomma(Jordan et Richardson)和金线鱼Nemipterus virgatus(Houttugn)鳃上的似杯盘虫属Calydiscoides Young,19693新种,锚形似杯盘虫Calydiscoides ancoratus sp.nov.,强壮似杯盘虫Calydiscoides robustus sp.nov.和深圳似杯盘虫Calydiscoides shenzhenensis sp.nov.,3新种的鳞盘、背腹中央大钩、中央联结片和侧联结片均相似于已知种,但它们的交接器和阴道与已知种不同。
This paper described three new species of the genus Calydiscoides Young, 1969, parasiting in the gills of Lethrinus xanthochilus （Klunzinger, 1870）, Scolopsis eriomma （Jordan et Richardson, 1909 ） and Nemiplerus virgatus （Houtugn, 1782）. The specimens are deposited in School of Biological Science, Guangzhou University. All measurements are in millimeter.
1 Calydiscoides ancoratus sp. nov. （Figs. 1-9）
Host. Lethrinus xanthochilus （Klunzinger, 1870）.
Location. Gills.
Locatity. Raoping （23.7°N, 117°E）, Guangdong Province.
Date. 4 Mar. 2005.
Type specimens. Holotype Gdgz20050304-1, paratype Gdgz20050304-2-25.
Etymology. This species is named cncoratus because of its anchorshaped vaginal sderite.
Body elongate, （0.83-1.17） × （0.11-0.16） in size. haptor set off from body, （ 0.099-0. 120 ） × （0.086-0. 114） in size, with 1 pair of dorsal central and 1 pair of ventral central anchors supported by 2 dorsal central transverse bars （forked at 1 end） and 1 ventral central transverse V-shaped bar. Fourteen marginal hooks, larval-shaped, 0.010-0.013 in length. Two squamoidiscs, dorsal and ventral, each lamellodisc with 9-10 concentric lamellae, lamellae telescope upon each other. The shape of the two squamodisc is similar to ladder-shaped or rings, （ 0.021-0.039 ） × （ 0.026- 0.039） in size, two dorsal central anchors without roots differentiation, 0.042-0.055 in total length. Two ventral central anchors with well-developed roots; 0.049-0.057 in total length, basal portion 0.035-0.042, point 0.010- 0.014, inner root 0.016-0.019, outer root 0.010- 0.017.One ventro-medial transverse （0.062-0.073） ×（0.007-0.009） in size, two dorso-laeral transverses （0.042-0.055） × （0.006-0.008）in size.
The testis oval, （0.098-0.112） × （0.045-0.070） in size, vas deferens convoluted, intercaecal; ascends to level of copulatory organ, ovary elongate, （0.065- 0.093） × （0.010-0.015）in size.
Copulatory tube curved, 0.042-0.052 in length, with a base portion of curved-piece, 0. 028-0.034 in length, supporting apparatus piece-shaped, 2/3 of the base portion is strong, 1/3 of the end is bifid, scissors- shaped, （0.065-0.083） × （0.008-0.012）in size. Viginal anchor-shaped, 0.030-0.035 in length. Egg is ovoid, （0.099-0.109） × （0.049-0.070） in size, with single filament.
Remarks. Comparaed with the known fourteen species, the sderotised structttres of this species are similar to Calydiscoides australis Young, 1969, C. nemipteris Thoney, 1989 and C. indianus, but differs from the known species in the shape of copulatory organ and vigina.
2 Calydiscoides robustus sp. nov. （Figs. 16-19）
Host. Sco/opsis eriomma （Jordan et Rdchardson, 1909）.
Location. Gills.
Locatity. Raoping （23.7°N, 117°E）, Guangdong Province.
Date. 12 Apr. 2005.
Type specimens. Holotype Gdgz20050412-1, paratype Gdgz20050412-2-20.
Etymology. This species is named robustus because of the base portion of its copulatory tube is strong.
Body elongate, （0.61-0.82） × （0.14-0.19） in size., haptor set off from body, （0.083-0.135） × （0.096-0.153） in size, with 1 pair of dorsal central and 1 pair of ventral central anchors supported by 2 dorsal central transverse bars and 1 ventral central transverse V-shaped bar. Fourteen marginal hooks, larval-shaped, 0.010-0.013.in length two squamoidiscs, dorsal and ventral; each lamellodlsc with 9-11 concentric lamellae, lamcllac telescope upon each other. The shape of the two squamodisc is similar to ladder-shaped or rings, （0.036- 0.057） × （0.036-0.055） in size, two dorsal central anchors without roots differentiation, 0.042-0.047 in total length. Two ventral central anchors with well-developed roots; 0.055-0.062 in total length, basal portion 0.034-0.044, point 0.010-0.013, inner root 0.020-0.025, outer root 0.012-0.014.One ventromedial transverse （0.075-0.094） × （0.007-0.010） in size, two dorso-laeral transverses （ 0.047-0.070 ） × （0.012-0.016） in size.
The testis oval, （0.128-0.0.170） × （0.053- 0.080） in size, vas deferens convoluted, intercaecal; ascends to level of copulatory organ, ovary elongate, （0.070-0.090） × （0.015-0.023）in size.
Copulatory robe curved, slithtly ＂ C-shaped ＂, 0.093-0. 119 in length, the base portion is strong, 0.016- 0.023 in width, supporting apparatus piece-shaped, （0.047-0.062） × （0.008-0.012） in size. Vigina is irregular plate-like, （0.041-0.047） × （0.012-0.014） in size, there is a ＂V-shaped＂ narrow sclerotized piece in the middle of the plate, 0.053-0.059 in length. Egg not observed.
Remarks. Comparaed with the known species, the sclerotised structures of this species are similar to Calydiscoides nemipteris Thoney, 1989 and C. scolopsidis Lim, 2003, but differs from the known species in the shape of copulatory organ and vigina.
3 Calydiscoides shenzhenensis sp. nov. （Figs. 24-29）
Host. Nemipterus virgatus （Houttugn, 1782）.
Location. Gills.
Locatity. Shenzhen （ 22.5°N, 113.9°E ）, Guangdong Province.
Date. 5 Mar. 2005.
Type specimens Holotype Gdsz20060305-1 paratype Gdsz20060305-2-8.
Etvmology. This species is named shenzhenensis after Shenzhen, the type-locality.
Body elongate, （0.774-1.044） × （0.113-0.181） insize; haptor set offfrom body, （0.0 98-0.172） × （0.078-0. 142） in size, with 1 pair of dorsal central and 1 pair of ventral central anchors supported by 2 dorsal central transverse bars and 1 ventral central transverse V- shaped bar. Fourteen marginal hooks, larval-shaped, 0.011-0.013 in length. Two squamoidiscs, dorsal and ventral; each lamellodisc with 8-11concentric lamellae, lamellae telescope upon each other. The shape of the two squamodisc is similar to ladder-shaped or rings, （0.048- 0.060） × 0.043 in size, two dorsal central anchors without roots differentiation, 0.030-0.038 in total length. Two ventral central anchors with well-developed roots; 0.046-0.053 in total length, basal portion 0.028- 0.036, point 0.010-0.013, inner root 0.018-0.024, outer root 0.010-0.014.One ventro-medial uanswerse （0.068-0.083） × （0.（106 -0.009） in size, two dorsolaeral transverses （0.053-0.060） × （0.010-0.011） in size.
The testis oval, （0.168-0.213） × （0.055-0.080） in size, vas deferens convoluted, intercaecal; ascends to level of copulatory organ, ovary elongate, （0.115- 0.145） × （0.018-0.028）in size.
Copulatory robe curved piece-shaped, the end is bifid, （0.033-0.040） in length, supporting apparatus is tobacco pipe-shaped or shower nozzle-shaped, the handle of tobacco pipe 0.025-0.030 in length, tobacco pipe 0.013 in diameter. Vigina musoalar, irregular plateshaped, （0.020-0.030） × （0.013-0.020） in size, there is a narrow curved sclerotized piece at the forword, egg not observed.
Remarks. Comparaed with the known species, the copulatory of this species is similar to Calydiscoides nemipteris, with a curved sclerotized robe, but the end of copulatory robe is bifid, and the known species without bifid, and this species is different from all the known species of this genus and the two pervious new species descn＇bed in having a tobacco pipe-shaped or shower nozzle-shaped supporting apparatus, the shape of vigina is also different from the known species.
出处
《动物分类学报》
CSCD
北大核心
2007年第2期423-429,共7页
Acta Zootaxonomica Sinica
基金
广州大学2003年科研项目资助
关键词
单殖吸虫
鳞盘虫科
似杯盘虫属
海洋鱼类
新种
Monogenoidea, Diplectanidae, Calydiscoides, marine fishes, new species
