Table I.

List of the North American species of Trichobilharzia and their definitive and/or intermediate hosts from the type descriptions.

Species		Intermediate host	Definitive host	Type Locality
Trichobilharzia adamsi	Edwards & Jansch, 1955	Physa gyrina†	* Exp: peking duck	Canada
Trichobilharzia alaskensis	Harkema, 1960	Lymnaea stagnalis†	Exp: peking duck	Alaska
Trichobilharzia brantae	Farr & Blankemeyer, 1956	unknown	Branta canadensis†	Virginia
Trichobilharzia burnetti	Brackett, 1942	unknown	Aythya collaris†	Wisconsin
Trichobilharzia cameroni	Wu, 1953	Physa gyrina†	Exp: canary, pigeon, domestic duck	Canada
Trichobilharzia elvae	(Miller, 1923) Talbot, 1936	Lymnaea stagnalis†	Exp: peking & black duck	Michigan
Trichobilharzia horiconensis	Brackett, 1942	unknown	Anas americana†	Wisconsin
Trichobilharzia kegonsensis	Brackett, 1942	unknown	Aythya valisinera†	Wisconsin
Trichobilharzia ocellata	(La Valette, 1855) Brumpt, 1931	Lymnaea stagnalis†	Exp: domestic duck	Germany
Trichobilharzia oregonensis	MacFarlane & Macy 1946	Physa gyrina†	Exp: peking duck	Oregon
Trichobilharzia physellae	(Talbot, 1936) McMullen & Beaver, 1945	Physa parkeri†	Exp: domestic duck	Michigan
Trichobilharzia querquedulae	McLeod, 1937		Anas discors†	Canada
Trichobilharzia stagnicolae	(Talbot, 1936) McMullen & Beaver, 1945	Stagnicola emarginata†	Exp: canary	Michigan
Trichobilharzia waubesensis	Brackett, 1942	unknown	Anas americana†	Wisconsin

^*Exp=experimental exposure;

^†Type host.