The second dataset, which was composed of part of the internal transcribed spacer region 2, focused on taxa within the schistosome BTGD clade, which includes species of Bilharziella, Trichobilharzia, Gigantobilharzia, and Dendritobilharzia (sensu 24).
With respect to these behavioral and morphologic features, and on the basis of size, the cercariae most closely resemble those of Gigantobilharzia huttoni (Leigh 1953), the only other schistosome previously collected from haminoeid snails (23,29) (Table 2).
However, they differ from all other species in the genus Gigantobilharzia Ohdner 1910 in habitat (salt water rather than fresh water) and snail host (opisthobranchid rather than pulmonate).
Marine schistosomes have been reported in gulls, ducks, terns, herons, cormorants, and turnstones (14,17,19,23), and Gigantobilharzia spp.
The morphology of Gigantobilharzia huttoni (Leigh, 1953), an avian schistosome with marine dermatitis producing larvae.
Life history of Gigantobilharzia huronensis Najim, 1950, a dermatitis-producing bird blood-fluke (Trematoda-Schistosomatidae).
Brown and white pelicans as hosts for schistosomes of the genus Gigantobilharzia.