O. minuta may refer to:
Ochrolechia minuta - species of crustose lichen Ohridohauffenia minuta - species of minute freshwater hydrobiid gastropod Olivella minuta - species of small sea snail Oloessa minuta - species of beetle Oncideres minuta - species of beetle Oopsacas minuta - a species of glass sponge Oreophryne minuta - species of frog