Vegetative Stages, Sporogenesis and Spore Morphology of Ceratomyxa appendiculata, Thélohan, 1892 (Myxozoa: Bibalvulida), from the Gall Bladder of Lophius budegassa, Spinola, 1807 (Teleostei: Lophiidae)

Pedro Andrés Maíllo-Bellón ； María Pilar Gracia-Royo

《Acta Protozoologica》 46卷3期 (2007/09) Pp. 247-256

並列摘要

Spore morphology and sporogenesis of Ceratomyxa appendiculata Thélohan, 1892, found in the gall bladder of black-anglerfish Lophius budegassa from NE Spain were studied by light microscopy and, for the first time, by transmission and scanning electron microscopy. Arch-shaped mature spores were 7.58 ± 5.21 μm in length, 21.55 ± 7.51 μm in width (in sutural view). Two equal sized, nearly spherical, polar capsules, located in the centre of the spore in subapical position, were 3.27 ± 0.45 μm in length, 2.93 ± 0.56 μm in width and each contained a polar filament with four turns. Two sporoplasms were arranged asymmetrically in the spore cavity. Trophozoites are highly variable in shape and size, having 1-4 long pseudopods bearing small filopodial projections. Different-sized swellings form along the main pseudopod. Masses of young aggregated trophozoites are frequent. Pseudoplasmodium was proliferated by exogenous budding. Divisions of generative cells without pansporoblast formation give rise to two or more spores within the primary cell. Capsulogenic cells have eccentric nuclei and some mitochondria, and harbour large capsular primordia. Aberrant trivalve and quadrivalve spores were observed.

並列關鍵字

Ceratomyxa appendiculata ； fish ； gall bladder ； Myxozoa ； sporogenesis