Site of infection: intestine.
Recruitment: ingestion.
Distribution: USA: Colorado (Buhler 1968, 1970; HWML); Virginia (Jones et al. 1958).
Specimens in collections: HWML: 33913, 37201.
Remarks: Ophiotaenia gracilis and Ophiotaenia magna share Lithobates catesbeianus as type host. Position of genital pore in mature proglottids (pre-equatorial in O. magna and equatorial in O. gracilis) differentiate them (Hannum 1925; Jones et al. 1958).