摘要
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.
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.
出处
《水生生物学报》
CAS
CSCD
北大核心
2000年第4期380-383,共4页
Acta Hydrobiologica Sinica
基金
中国科学院重大项目!KZ952-S1-118
