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展开更多
The early stages and capsulogenetic stages of sporogenesis of Myxobolus kwangsiensis were studied indetail by electron microscopy. M. kwangsiensis is an intrasellular myxsporen infecting the epithelial cellsof kidney ...The early stages and capsulogenetic stages of sporogenesis of Myxobolus kwangsiensis were studied indetail by electron microscopy. M. kwangsiensis is an intrasellular myxsporen infecting the epithelial cellsof kidney tubules of young dace Labeo rohita. The M. kwangsiensis sporogenesis presents the typical featuresof myxosporea. The initial stages are multinuceate primary cells, with one primary cell typicallyenclosing one secondary cell. The secondary cells are formed directly by cytokinesis inside the primary cells. Theprimary cell participates in the formation of the secondary cell nucleus. The nuclear division of primarycell is asynchronous by amitosis. The parasitic organisms may degenerate inside the epithelial cells at anystage. The modes of sporoblast formation , the typical features of myxosporea and the cause of its degradationare discussed.展开更多
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
基金This research was supported by the NSFC(No.39070675)
文摘The early stages and capsulogenetic stages of sporogenesis of Myxobolus kwangsiensis were studied indetail by electron microscopy. M. kwangsiensis is an intrasellular myxsporen infecting the epithelial cellsof kidney tubules of young dace Labeo rohita. The M. kwangsiensis sporogenesis presents the typical featuresof myxosporea. The initial stages are multinuceate primary cells, with one primary cell typicallyenclosing one secondary cell. The secondary cells are formed directly by cytokinesis inside the primary cells. Theprimary cell participates in the formation of the secondary cell nucleus. The nuclear division of primarycell is asynchronous by amitosis. The parasitic organisms may degenerate inside the epithelial cells at anystage. The modes of sporoblast formation , the typical features of myxosporea and the cause of its degradationare discussed.
