Fig. 4From: First light microscopy and ultrastructural description of Mesocoelium sociale (Luhe, 1901) Odhner, 1910 (Trematoda: Mesocoeliidae) in Bufo regularis from EgyptScanning electron micrographs of Mesocoelium sociale. a Shows the whole worm. b Shows the anterior end provided with oral sucker (O.S.) surrounding the mouth opening (M.) that appears as a vertical slit, sessile ventral sucker (V.S.), and tegumental spines. c Shows the muscular oral sucker (O.S.) surrounding the mouth opening (M.) that appears as deep hole and ventral sucker on very short peduncle (Ped.). d Shows magnified ventral sucker (V.S.) surrounded by dense tegumental spinesBack to article page