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Description and Life History of Cardicola alseae sp. n. (Trematoda: Sanguinicolidae)
Thomas G. Meade and Ivan Pratt
The Journal of Parasitology
Vol. 51, No. 4 (Aug., 1965), pp. 575-578
Stable URL: http://www.jstor.org/stable/3276234
Page Count: 4
You can always find the topics here!Topics: Snails, Testes, Miracidia, Ovaries, Cercariae, Blood, Eggs, Infections, Trout, Fingerlings
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Cardicola alseae is a blood-dwelling trematode found in the fishes Salmo clarkii Richardson and Salmo gairdnerii Richardson. The ovoid and nonoperculate eggs leave the adult and pass to the gill capillaries of the secondary lamellae. The miracidia apparently are ingested by the snail Oxytrema silicula (Gould), and sporocysts develop in the visceral mass. No mother sporocyst generation was identified. Percentage of infection was low, with infected snails having sporocysts of equal size in which furcocercous, lophocercous cercariae develop. A delicate dorsal fin extends at least three-fourths the length of the cercarial body. On contact with soft parts of a potential fish host, the cercaria penetrates within 15 to 20 min. The adult fluke was removed from blood vessels of the gills, liver, mesenteries, and kidneys. It is covered with small spines, possesses a highly saccular testis, subterminal mouth, an H-shaped intestine, and lacks a pharynx. Cardicola alseae is one of three blood flukes found in salmonid fishes and differs from the other two in morphology of the cercaria, size of the adult worm, number of rows of marginal spines, and shape of the testis, ovary, excretory bladder, and intestine. Sanguinicola davisi Wales, 1958, and Sanguinicola klamathensis Wales, 1958, are transferred to the genus Cardicola, becoming Cardicola davisi (Wales, 1958) comb. n. and Cardicola klamathensis (Wales, 1958) comb. n.
The Journal of Parasitology © 1965 The American Society of Parasitologists