Gyrodactylus acanthorhodei Ergens & Yukhimenko, 1975 (basis of record)
Gyrodactylus ackerti Mizelle & Kritsky, 1967 (basis of record)
Gyrodactylus adspersi Cone & Wiles, 1983 (additional source)
Gyrodactylus aeglefini Bychowsky & Polyansky, 1953 (additional source)
Gyrodactylus afghanensis Ergens, 1979 (basis of record)
Gyrodactylus aggregatus Mizelle & Kritsky, 1967 (basis of record)
Gyrodactylus aksuensis Ergens & Karabekova, 1980 (basis of record)
Gyrodactylus alabamensis Rogers, 1968 (basis of record)
Gyrodactylus albeoli Rogers, 1968 (basis of record)
Gyrodactylus alberti Paperna, 1973 (basis of record)
Gyrodactylus aldrichi Threlfall, 1974 (basis of record)
Gyrodactylus alexanderi Mizelle & Kritsky, 1967 (basis of record)
Gyrodactylus alviga Dmitrieva & Gerasev, 2000 (basis of record)
Gyrodactylus ambystomae Mizelle, Kritsky & McDougal, 1969 (basis of record)
Gyrodactylus ammodyti Zhukov, 1960 (basis of record)
Gyrodactylus amphiliusi Paperna, 1973 (basis of record)
Gyrodactylus amurensis Achmerov, 1952 (basis of record)
Gyrodactylus anabantii Paperna, 1973 (basis of record)
Gyrodactylus anarhichatis Mo & Lile, 1998 (additional source)
Gyrodactylus angorae Ergens & Ibragimov, 1979 (basis of record)
Gyrodactylus anguillae Ergens, 1960 (basis of record)
Gyrodactylus anisopharynx Popazoglo & Boeger, 2000 (basis of record)
Gyrodactylus antarcticus Gusev, 1967 (basis of record)
Gyrodactylus anudarinae Ergens & Dulmaa, 1968 (basis of record)
Gyrodactylus aphredoderi Rogers & Wellborn, 1965 (basis of record)
Gyrodactylus aphyae Malmberg, 1957 (basis of record)
Gyrodactylus aquilinus Threlfall, 1974 (basis of record)
Gyrodactylus arcuatus Bychowsky, 1933 (additional source)
Gyrodactylus armatus Crane & Mizelle, 1967 (basis of record)
Gyrodactylus asiaticus Ergens, 1978 (basis of record)
Gyrodactylus asperus Rogers, 1967 (basis of record)
Gyrodactylus atherinae Bychowsky, 1933 (additional source)
Gyrodactylus atratuli Putz & Hoffman, 1963 (basis of record)
Gyrodactylus aurorae Mizelle, Kritsky & McDougal, 1969 (basis of record)
Gyrodactylus australis Gusev, 1966 (basis of record)
Gyrodactylus avalonia Hanek & Threlfall, 1969 (additional source)
Gyrodactylus baeacanthus Wellborn & Rogers, 1967 (basis of record)
Gyrodactylus baicalensis Bogolepova, 1950 (basis of record)
Gyrodactylus bairdi Wood & Mizelle, 1957 (basis of record)
Gyrodactylus barbatuli Achmerov, 1952 (basis of record)
Gyrodactylus barbi Ergens, 1976 (basis of record)
Gyrodactylus bimaculatus An, Jara & Cone, 1991 (basis of record)
Gyrodactylus bimicroforatus Jin, 1993 (basis of record)
Gyrodactylus birmani Konovalov, 1967 (basis of record)
Gyrodactylus bliccensis Gläser, 1974 (basis of record)
Gyrodactylus bodegensis Mizelle & Kritsky, 1967 (basis of record)
Gyrodactylus bohemicus Ergens, 1992 (basis of record)
Gyrodactylus bolonensis Ergens & Yukhimenko, 1975 (basis of record)
Gyrodactylus brachymystacis Ergens, 1978 (basis of record)
Gyrodactylus branchicus Malmberg, 1964 (additional source)
Gyrodactylus branchius Mizelle & Kritsky, 1967 (basis of record)
Gyrodactylus bretinae Wellborn, 1967 (basis of record)
Gyrodactylus brevis Crane & Mizelle, 1967 (basis of record)
Gyrodactylus bubyri Osmanov, 1965 (additional source)
Gyrodactylus bulbacanthus Mayes, 1977 (basis of record)
Gyrodactylus bullatarudis Turnbull, 1956 (basis of record)
Gyrodactylus bychowskianus Bogolepova, 1950 (basis of record)
Gyrodactylus byrdi Hargis & Dillon, 1968 (basis of record)
Gyrodactylus caledoniensis Shinn, Sommerville & Gibson, 1995 (basis of record)
Gyrodactylus californiensis Mizelle & Kritsky, 1967 (basis of record)
Gyrodactylus callariatis Malmberg, 1957 (additional source)
Gyrodactylus callawayensis Mayes, 1977 (basis of record)
Gyrodactylus cameroni Hanek & Threlfall, 1969 (basis of record)
Gyrodactylus campostomae Wellborn, 1967 (basis of record)
Gyrodactylus canadensis Hanek & Threlfall, 1969 (additional source)
Gyrodactylus capoetai Ergens & Ibragimov, 1976 (basis of record)
Gyrodactylus carassii Malmberg, 1957 (basis of record)
Gyrodactylus carpio Kritsky & Mizelle, 1968 (basis of record)
Gyrodactylus catesbeianae Wootton, Ryan, Demaree & Critchfield, 1993 (basis of record)
Gyrodactylus centronoti Hargis & Dillon, 1968 (basis of record)
Gyrodactylus cernuae Malmberg, 1957 (basis of record)
Gyrodactylus chologastris Mizelle, Whittaker & McDougal, 1969 (basis of record)
Gyrodactylus chondrostomi Ergens, 1967 (basis of record)
Gyrodactylus cichlidarum Paperna, 1968 (basis of record)
Gyrodactylus clarii Paperna, 1973 (basis of record)
Gyrodactylus cobitis Bychowsky, 1933 (basis of record)
Gyrodactylus colemanensis Mizelle & Kritsky, 1967 (basis of record)
Gyrodactylus comephori Bogolepova, 1950 (basis of record)
Gyrodactylus commersoni Threlfall, 1974 (basis of record)
Gyrodactylus corti Mizelle & Kritsky, 1967 (basis of record)
Gyrodactylus costaricensis Kritsky & Fritts, 1970 (basis of record)
Gyrodactylus cotti Roman, 1956 (basis of record)
Gyrodactylus cottinus Zhukov, 1960 (basis of record)
Gyrodactylus couesius Wood & Mizelle, 1957 (basis of record)
Gyrodactylus cranei Mizelle & Kritsky, 1967 (basis of record)
Gyrodactylus crenilabri Zaika, 1966 (additional source)
Gyrodactylus cryptarum Malmberg, 1970 (additional source)
Gyrodactylus crysoleucas Mizelle & Kritsky, 1967 (basis of record)
Gyrodactylus ctenopomi Paperna, 1973 (basis of record)
Gyrodactylus curemae Conroy & Conroy, 1985 (additional source)
Gyrodactylus curiosus Gusev, 1955 (basis of record)
Gyrodactylus cyclopteri Scyborskaya, 1948 (additional source)
Gyrodactylus cylindriformis Mueller & Van Cleave, 1932 (basis of record)
Gyrodactylus cyprini Diarova, 1964 (basis of record)
Gyrodactylus cyprinodonti Paperna, 1968 (basis of record)
Gyrodactylus cyprinodontis Mizelle & Kritsky, 1967 (basis of record)
Gyrodactylus cytophagus Paperna, 1968 (basis of record)
Gyrodactylus dakotensis Leiby, Kritsky & Peterson, 1972 (basis of record)
Gyrodactylus dechtiari Hanek & Fernando, 1971 (basis of record)
Gyrodactylus decorus Malmberg, 1957 (basis of record)