Table 1.

Distribution of intermediate hosts of Fascioloides magna based on Baker's (1911) division of North American regions embracing natural drainage areas, and after Dunkel et al. (1996)

Intermediate hosts	Locality
Lymnea bulimoides	Californian (the coastal portion of Oregon and California), Texas
Lymnea caperata	Canadian (system of the St. Lawrence, All of Quebec and Ontario south of the Height of Land and Island of Anticosti); Hudsonian (western part of Ungava, southeastern part of Mackenzie, the whole of Keewatin, eastern Athabaska, the whole of Saskatchewan, Assiniboia, Manitoba, the southern part of Alberta, Ontario and Quebec northwest of Height of Land, the northern part of Minnesota and the eastern part of North Dakota); Yukonian (system of the Yukon river and north Alaska); Columbian (the southeastern part of British Columbia, the whole of Washington and Idaho, the western part of Montana and the eastern part of Oregon); Coloradoan (the southern part of Nevada and Utah, the western parts of Colorado and New Mexico, the southeastern part of Wyoming, the southeastern California, the northwestern part of Mexico and the whole of Arizona); Great Basin (the desert and arid regions of Nevada, Utah, Oregon and California); Californian (the coastal portion of Oregon and California); Upper Mississippian (south of the Height of Land in southern Canada and the Great Lakes, all of the territory between the Rocky Mountains on the west and the Appalachian Mountains on the east); Nova Scotian (the southeastern part of New York, the east-central portion of Pennsylvania, northern New Jersey, Virginia, the greater part of Maryland, the whole of Nova Scotia, New Brunswick, Newfoundland)
Lymnea parva	Canadian; Hudsonian; Columbian; Coloradoan; Rio Grandian (southern part of Colorado, nearly the whole New Mexico, the western part of Texas, northern and central part of Mexico); Upper Mississippian; Lower Mississippian (south of the Arkansas and Tenessee river); Nova Scotian
Lymnea modicella	Las Vegas valley, Idaho, Washington, Montana
Lymnea palustris nuttalliana	Searles Lake, Washington, Alberta