M. cornutus

M. cornutus may refer to:
 * Mantidactylus cornutus, a frog species
 * Mecolaesthus cornutus, a house spider species in the genus Mecolaesthus
 * Metopoceros cornutus, an iguana species in the genus Metopoceros
 * Mimetus cornutus, a pirate spider species in the genus Memetus
 * Modisimus cornutus, a vibrating spider species in the genus Modisimus
 * Mughiphantes cornutus, a money spider species in the genus Mughiphantes