M. minuta can refer to a few different species. The specific epithet means "minute" or "small".
Macrolopha minuta, a beetle in the genus Macrolopha
Manuherikia minuta, an extinct species of duck
Marchena minuta, a jumping spider
Marsilea minuta, or dwarf waterclover, an aquatic fern
Masdevallia minuta, an orchid in the genus Masdevallia
Megasporoporia minuta, a crust fungus in the family Polyporaceae
Melibe minuta, a nudibranch in the genus Melibe
Melica minuta, a grass in the family Poaceae
Metleucauge minuta, a spider in the genus Metleucauge
Menegazzia minuta, a lichen in the family Parmeliaceae
Miaenia minuta, a beetle in the family Cerambycidae
Micronycteris minuta, the white-bellied big-eared bat
Micropilina minuta, a mollusk in the genus Micropilina
Microrape minuta, a moth of the family Megalopygidae
Mimozotale minuta, a beetle in the family Cerambycidae
Ministigmata minuta, a spider in the family Microstigmatidae
Minutaleyrodes minuta, a whitefly in the family Aleyrodidae
Minutargyrotoza minuta, a moth of the family Tortricidae
Monomastix minuta, a green algae in the genus Monomastix
Mordellistena minuta, a beetle in the family Mordellidae
Mustela minuta, synonym for Palaeogale minuta, an extinct mammal in the genus Palaeogale Myolepta minuta, a hoverfly in the genus Myolepta Myriogramme minuta, a red algae in the genus Myriogramme Myrmekiaphila minuta, a trapdoor spider in the genus Myrmekiaphila