M. proximus

M. proximus may refer to:
 * Menemerus proximus, a jumping spider species in the genus Menemerus
 * Merenius proximus, a corinnid sac spider species in the genus Merenius
 * Mermessus proximus, a money spider species in the genus Mermessus
 * Microgadus proximus, a fish species in the genus Microgadus