Two new species of myxosporeans (Myxosporea:Bivalvulida),Mitrapora yiduensis sp.nov.and Myxobolus tuenfengensis sp.nov.,parasitic in freshwater fishes collected from the Yangtze River of China are described in this pa...Two new species of myxosporeans (Myxosporea:Bivalvulida),Mitrapora yiduensis sp.nov.and Myxobolus tuenfengensis sp.nov.,parasitic in freshwater fishes collected from the Yangtze River of China are described in this paper.All body organs of the host fishes,Siniperca chuatsi Basilewsky and Saurogobio dabrui Bleeker were examined and twenty spores of each myxosporean were measured with an eyepiece micrometer.All the measurement are in micrometers (μm) and the type specimens were deposited to Department of Fish Disease,the Institute of Hydrobiology, Chinese Academy of sciences,Wuhan,China. 1. Mitrapora yiduensis sp.nov. (Fig.1) Host:Sinperca chuatsi (Basilewsky) Location:Kidney Locality:Town of Yidu,Hubei province.(30°31′N,111°E) Date:May 1982. Vegetative form:Trophozites are amoeba-shaped about 20.6(18.5-23.2)by 18.4(16.5-20.6)in size. Spore:Bell-shaped in both thecal and sutural view.Blunt circular at anterior end and a truncate posterior end.Sutural ridge is straight.There are six lines on surface extending from the anterior end to the posterior end of the spore.Two pyriform polar capsules are equal in size and sporoplasm have an indinopilous vacuole and two round germinal nuclei.Dimension of spores preserved in 4%Formalin:Length 8.1 (7.2-8.4),width 5.2 (4.8-5.5),thickness 5.9 (5.8-6.2);length of the polar capsules 3.0 (2.8-3.2),width 2.1 (2.0-2.2). This species is similar to Mitraspora coreosiniperca Xiao at feng,1997,but the latter have a larger spore than the former and the former is blunt at anterior end of the spore,while the latter is slightly sharp at anterior end. 2. Myxobolus tuenfengensis sp.nov. (Fig.2) Host:Saurogobio dabryi Bleeker Location:Gill Locality:Tuanfeng Town,Hubei province(30°20′N,111°5′E) Date:June 1984. Cyst:Round or elliptical shaped with 0.3-0.5mm in size. Spore:Ovoid or nearly ellipsoid in thecal view and spindle in sutural view.The anterior end is truncate and the posterior end is blunt.The sutural ridge is rough and straight with distinct intercapsular appendix.Two pyriform polar capsules are equal in size.Sporoplasm is even,with an iodinophililous vacuole and two round germinal nuclei.Dimensions of preserved (in 4%Formalin) spores:Length 12.8 (12-13.6),width 9.4 (8.4-10),thickness 6.6 (6.0-7.0);length of the polar capsules 4.5 (4.0-5.0),width 3.0 (2.9-3.2). This species is similar to Myxobolus mesentricus Kudo,1919 and Myxobolus haichengensis Chen,1998. But the spore of our new species is larger than the other two species and they also differ in the size and form of polar capsules.展开更多
The present paper reports two new species of Myxosporida in Squaliobarbus curriculus from Changjiang River and Hypseleotris swinhonis from Donghu Lake, Wuhan. The type specinens were deposited in the Laboratory of Fis...The present paper reports two new species of Myxosporida in Squaliobarbus curriculus from Changjiang River and Hypseleotris swinhonis from Donghu Lake, Wuhan. The type specinens were deposited in the Laboratory of Fish Diseases, Institute of Hydrobiology, The Chinese Academy of Seiences, Wuhan, China. 1. Podospora yiduensis sp. nov. (Fig. l) Host: Squaliobarbus curriculus (Richardson). Location: Gall bladder, Kidney. Locality: Yidu city, Hubei province. (30°31, N, 111°E) Date of collection: October 14, 1982. Vegetative form: Cyst and trophozoite not observed. Spore: Flat ovid in sutural view, nearly spherical in thecal view, sharp at anterior end, round at posterior end, sutural ridge straight and rough; shell valve smooth, cylinder lucid and membrane-like protrustions present on two lateral sides of posterior end. Two polar capsules situated at the anterior end of the spore, being equal in size and nearly spherical. Sporoplasm with an iodinophilous vacuole and two nuclei. Dimension of spore : spore 6.2(5.9-6.5)μm, width 7.7(7.6-7.8)μm, thickness 5.6(5.2-6)μm, diameter of polar capsules 2.3(2.2-2.4)μm. outgrowth 3 × 3.6μm. This new species is similar to Podospora plagiognathopis Chen et Hsich, 1984, but differs from the latter by being smaller in size, and having two cylinder lucid and membrane-like protrusions present on two lateral sides of posterior end. 2. Myxobolus chinensis sp. nov. (Fig.2) Host: Hypseleotris swinhonis (Gnther). Location: The muscle of pack, between head and chest.. Locality: Wuhan, Donghu Lake. (30° 31, N, 1 14°20, E) Dote of collection: August 7.1993. Cyst: Ellipsoild, white, size 0.5-0.3cm. Spore: Pyriform in front view, spindle in sutural view, spore shell smooth. Sutural ridge straight and sturdy, intercapsular process distinct, two long rod-like polar capsules equal in size, polar filament distince and coiled 12- 14 circles. Sporoplasm with an iodinophilous vacuole and two nuclei. Two ovoid or triangular polar capsules nuclei situated under the polar capsules, with 4 to 5 "V" shaped fold in the posterior, Dimentions of spores: length 14.l(14.2- 15)μm, width 8 (7.8-8.2) μm, thickness 6.5(6.4-6.6)μm, polar capsule 8.8(8.5-9.5)μm by 2.4(2.3-2.5)μm. This new species is similar to Myxobolus catlae Chakravarty 1943 but differs from the latter in size and shape of spores.展开更多
The present paper deals with three new species in the genus Gyrodactylus found on freshwater fishes from Wuling Mountain Region. All the measurements are in mm. Type specimens are deposited in the Laboratory of Fish D...The present paper deals with three new species in the genus Gyrodactylus found on freshwater fishes from Wuling Mountain Region. All the measurements are in mm. Type specimens are deposited in the Laboratory of Fish Disease, Institute of Hydrobiology, The Chinese Academy of Sciences, Wuhan. 1. Gyrodactylus parabotia sp. nov. (Fig.1) Body small size, being 0.233-0.235 long and 0.045-0.05 in width. Marginal hooklets are of ordinary type; total length 0.025 -0.027, handle 0.02-0.022, point 0.005. Total length of anchors 0.051 -0.062; the basal portion 0.02, handle length 0.043-0.045, point about 0.027-0.037. Ventral bar 0.023-0.05, marginal hooklets 0.008-0.01. Dorsal bar 0.002×0.019-0.022. Cirrus armed with a row of four triangular spines and a large cuticular spine. Location, host and localities: gill of Parabotia fasciata Dabry; Cili, Hunan Province (29.42°N, 111.02°E). Description is based on 10 specimens. The new species is similar to G.latus Bychowsky, 1933 in the structure of opisthohaptor, but differs in the size and chitinod structure. 2. Gyrodactylus lichuanensis sp. nov. (Fig.2) Body small size, being 0.19 long and 0.025 in width. Marginal hooklets are of ordinary type; total length 0.027, handle 0.023 , point 0.003. Total length of anchors 0.054-0.065; the basal portion 0.017 -0.019, handle length 0.036-0.037, point about 0.024. Ventral bar 0.012-0.015, marginal hooklets 0.006-0.009. Dorsal bar 0.0158-0.0265 ×0.001. Cirrus bulb has not been observed. Location, host and localities: skin of Phoxinus lagowskii variegatus (Gunth); Lichuan, Hubei Province (30.29°N, 109.0°E). Description is based on 5 specimens. The worm closely resembles G.oxycephali Achmerow, 1952 with reference to the anchor, but differs from the latter by the characteristics of the ventral bar, which is "一" shaped, while the ventral bar of the latter is small intestine shaped. 3. Gyrodactylus hunanensis sp. nov.(Fig.3) Body small size, being 0.14-0.218 long and 0.035-0.053 in width. Marginal hooklets are of ordinary type; total length 0.022-0.025, handle 0.018-0.02, point 0.004-0.005. Total length of anchors 0.048-0.05; the basal portion 0.02-0.022, handle length 0.035-0.038, point about 0.018-0.02. Ventral bar 0.023-0.026, marginal hooklets 0.005-0.007. Dorsal bar 0.002-0.003× 0.013 -0.19. Cirrus armed with a row of 6 short spines. Location, host and localities: gill of Erythroculter ilishaeformis (Bleeker); Yunshuen County, Hunan Province (29.0°N, 109.8°E). Description is based on 8 specimens. The new species is similar to G. honghuensis Zhang et Ji, 1978 in the structure of opisthohaptor, but differing in the structure and size of ventral bar and cirrus.展开更多
基金This work was supported by the Natural Science Foundation of Chongqing (9061) and the Scientific and Technological Research Foundation ofChongqing Education Committee (030805)
文摘对采自重庆地区寄生于鲢、鳙及草鱼鳃上的5种外寄生车轮虫进行了形态学及分类学研究,其分别隶属于:车轮虫属、小车轮虫属及三分虫属,其中包含1新种和中国2新纪录。即钝圆车轮虫Trichodina obtusiformissp . nov .,急尖车轮虫T. acutaLom,1961,显著车轮虫T. nobilisChen ,1963,周丛小车轮虫Trichodinella epizootica( Rabbe ,1950)Sramek-Husek ,1953和大型三分虫Tripartiella macrosomaBasson & Van As ,1987。文中对新种进行了详细的描述并提供了新种及已知种的附着盘银染标本之显微照片及齿体线条图。
文摘Two new species of myxosporeans (Myxosporea:Bivalvulida),Mitrapora yiduensis sp.nov.and Myxobolus tuenfengensis sp.nov.,parasitic in freshwater fishes collected from the Yangtze River of China are described in this paper.All body organs of the host fishes,Siniperca chuatsi Basilewsky and Saurogobio dabrui Bleeker were examined and twenty spores of each myxosporean were measured with an eyepiece micrometer.All the measurement are in micrometers (μm) and the type specimens were deposited to Department of Fish Disease,the Institute of Hydrobiology, Chinese Academy of sciences,Wuhan,China. 1. Mitrapora yiduensis sp.nov. (Fig.1) Host:Sinperca chuatsi (Basilewsky) Location:Kidney Locality:Town of Yidu,Hubei province.(30°31′N,111°E) Date:May 1982. Vegetative form:Trophozites are amoeba-shaped about 20.6(18.5-23.2)by 18.4(16.5-20.6)in size. Spore:Bell-shaped in both thecal and sutural view.Blunt circular at anterior end and a truncate posterior end.Sutural ridge is straight.There are six lines on surface extending from the anterior end to the posterior end of the spore.Two pyriform polar capsules are equal in size and sporoplasm have an indinopilous vacuole and two round germinal nuclei.Dimension of spores preserved in 4%Formalin:Length 8.1 (7.2-8.4),width 5.2 (4.8-5.5),thickness 5.9 (5.8-6.2);length of the polar capsules 3.0 (2.8-3.2),width 2.1 (2.0-2.2). This species is similar to Mitraspora coreosiniperca Xiao at feng,1997,but the latter have a larger spore than the former and the former is blunt at anterior end of the spore,while the latter is slightly sharp at anterior end. 2. Myxobolus tuenfengensis sp.nov. (Fig.2) Host:Saurogobio dabryi Bleeker Location:Gill Locality:Tuanfeng Town,Hubei province(30°20′N,111°5′E) Date:June 1984. Cyst:Round or elliptical shaped with 0.3-0.5mm in size. Spore:Ovoid or nearly ellipsoid in thecal view and spindle in sutural view.The anterior end is truncate and the posterior end is blunt.The sutural ridge is rough and straight with distinct intercapsular appendix.Two pyriform polar capsules are equal in size.Sporoplasm is even,with an iodinophililous vacuole and two round germinal nuclei.Dimensions of preserved (in 4%Formalin) spores:Length 12.8 (12-13.6),width 9.4 (8.4-10),thickness 6.6 (6.0-7.0);length of the polar capsules 4.5 (4.0-5.0),width 3.0 (2.9-3.2). This species is similar to Myxobolus mesentricus Kudo,1919 and Myxobolus haichengensis Chen,1998. But the spore of our new species is larger than the other two species and they also differ in the size and form of polar capsules.
文摘The present paper reports two new species of Myxosporida in Squaliobarbus curriculus from Changjiang River and Hypseleotris swinhonis from Donghu Lake, Wuhan. The type specinens were deposited in the Laboratory of Fish Diseases, Institute of Hydrobiology, The Chinese Academy of Seiences, Wuhan, China. 1. Podospora yiduensis sp. nov. (Fig. l) Host: Squaliobarbus curriculus (Richardson). Location: Gall bladder, Kidney. Locality: Yidu city, Hubei province. (30°31, N, 111°E) Date of collection: October 14, 1982. Vegetative form: Cyst and trophozoite not observed. Spore: Flat ovid in sutural view, nearly spherical in thecal view, sharp at anterior end, round at posterior end, sutural ridge straight and rough; shell valve smooth, cylinder lucid and membrane-like protrustions present on two lateral sides of posterior end. Two polar capsules situated at the anterior end of the spore, being equal in size and nearly spherical. Sporoplasm with an iodinophilous vacuole and two nuclei. Dimension of spore : spore 6.2(5.9-6.5)μm, width 7.7(7.6-7.8)μm, thickness 5.6(5.2-6)μm, diameter of polar capsules 2.3(2.2-2.4)μm. outgrowth 3 × 3.6μm. This new species is similar to Podospora plagiognathopis Chen et Hsich, 1984, but differs from the latter by being smaller in size, and having two cylinder lucid and membrane-like protrusions present on two lateral sides of posterior end. 2. Myxobolus chinensis sp. nov. (Fig.2) Host: Hypseleotris swinhonis (Gnther). Location: The muscle of pack, between head and chest.. Locality: Wuhan, Donghu Lake. (30° 31, N, 1 14°20, E) Dote of collection: August 7.1993. Cyst: Ellipsoild, white, size 0.5-0.3cm. Spore: Pyriform in front view, spindle in sutural view, spore shell smooth. Sutural ridge straight and sturdy, intercapsular process distinct, two long rod-like polar capsules equal in size, polar filament distince and coiled 12- 14 circles. Sporoplasm with an iodinophilous vacuole and two nuclei. Two ovoid or triangular polar capsules nuclei situated under the polar capsules, with 4 to 5 "V" shaped fold in the posterior, Dimentions of spores: length 14.l(14.2- 15)μm, width 8 (7.8-8.2) μm, thickness 6.5(6.4-6.6)μm, polar capsule 8.8(8.5-9.5)μm by 2.4(2.3-2.5)μm. This new species is similar to Myxobolus catlae Chakravarty 1943 but differs from the latter in size and shape of spores.
文摘The present paper deals with three new species in the genus Gyrodactylus found on freshwater fishes from Wuling Mountain Region. All the measurements are in mm. Type specimens are deposited in the Laboratory of Fish Disease, Institute of Hydrobiology, The Chinese Academy of Sciences, Wuhan. 1. Gyrodactylus parabotia sp. nov. (Fig.1) Body small size, being 0.233-0.235 long and 0.045-0.05 in width. Marginal hooklets are of ordinary type; total length 0.025 -0.027, handle 0.02-0.022, point 0.005. Total length of anchors 0.051 -0.062; the basal portion 0.02, handle length 0.043-0.045, point about 0.027-0.037. Ventral bar 0.023-0.05, marginal hooklets 0.008-0.01. Dorsal bar 0.002×0.019-0.022. Cirrus armed with a row of four triangular spines and a large cuticular spine. Location, host and localities: gill of Parabotia fasciata Dabry; Cili, Hunan Province (29.42°N, 111.02°E). Description is based on 10 specimens. The new species is similar to G.latus Bychowsky, 1933 in the structure of opisthohaptor, but differs in the size and chitinod structure. 2. Gyrodactylus lichuanensis sp. nov. (Fig.2) Body small size, being 0.19 long and 0.025 in width. Marginal hooklets are of ordinary type; total length 0.027, handle 0.023 , point 0.003. Total length of anchors 0.054-0.065; the basal portion 0.017 -0.019, handle length 0.036-0.037, point about 0.024. Ventral bar 0.012-0.015, marginal hooklets 0.006-0.009. Dorsal bar 0.0158-0.0265 ×0.001. Cirrus bulb has not been observed. Location, host and localities: skin of Phoxinus lagowskii variegatus (Gunth); Lichuan, Hubei Province (30.29°N, 109.0°E). Description is based on 5 specimens. The worm closely resembles G.oxycephali Achmerow, 1952 with reference to the anchor, but differs from the latter by the characteristics of the ventral bar, which is "一" shaped, while the ventral bar of the latter is small intestine shaped. 3. Gyrodactylus hunanensis sp. nov.(Fig.3) Body small size, being 0.14-0.218 long and 0.035-0.053 in width. Marginal hooklets are of ordinary type; total length 0.022-0.025, handle 0.018-0.02, point 0.004-0.005. Total length of anchors 0.048-0.05; the basal portion 0.02-0.022, handle length 0.035-0.038, point about 0.018-0.02. Ventral bar 0.023-0.026, marginal hooklets 0.005-0.007. Dorsal bar 0.002-0.003× 0.013 -0.19. Cirrus armed with a row of 6 short spines. Location, host and localities: gill of Erythroculter ilishaeformis (Bleeker); Yunshuen County, Hunan Province (29.0°N, 109.8°E). Description is based on 8 specimens. The new species is similar to G. honghuensis Zhang et Ji, 1978 in the structure of opisthohaptor, but differing in the structure and size of ventral bar and cirrus.
