Callulina stanleyi is a species of frog in the family Brevicipitidae. It was discovered in 2010 during a survey of rainforests in the northern part of the Eastern Arc Mountains of Tanzania. It was named in honour of the American zoologist, William T. Stanley, of the Field Museum, Chicago, who has done much research into the amphibians of Tanzania. It is present at three locations along the eastern border of Chome Forest Reserve at altitudes between 1,100 and 1,300 m (3,600 and 4,300 ft). It is rated as "critically endangered" by the International Union for Conservation of Nature.