. . _:b75877952 . _:b75877952 . "Walker, 1848" . . _:b75877952 "GBIF id" . "Gastrancistrus geganius" . "Gastrancistrus geganius" . _:b75877952 "1394974" . _:b75877952 . . . "Gastrancistrus geganius Walker, 1848" . "1025043" . . "1394974" . .