A unique fixation of the locus of basis elements in graphs

Abstract :

The scanning electron microscopic investigation clearly revealed the diversified nature of the surface topograplhy of fish trematode parasites viz.,Didymozoon tetragynae, Allodidymozoon cylindricum and Didymocystis n.sp. These variation are mainly due to the adoption of the parasites to micro environment. The tegumental folding, ridges and furrows lameller network impart considerable stretching capacity to the didymozoids. These structures also increase the surface area of absorbtion of micro molecular nutrients. Three type of papillae  are rocorded on the dorsal and dorsolateral surface of Didymocystis n.sp. and domed papillae are recorded in D.tetragynae and  A. cylindricum. Each type may perform specific sensory function. The numerous integumental elevations found in Didymozoon tetragynae and Didymocystis n.sp.suggest they may help in attachment.