Bowers, E. A.; Bartoli, P.; James, B. L. (1990). A demonstration of allopatric sibling species within the Gymnophallidae (Digenea). Systematic Parasitology. 17: 143–152.
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Bowers, E. A.; Bartoli, P.; James, B. L.
1990
A demonstration of allopatric sibling species within the Gymnophallidae (Digenea)