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
See also Cornutus (disambiguation)