Macromerus typicus – synonym of Propithecus diadema diadema
Maki mococo – synonym of Lemur catta
Maki mongous – synonym of Eulemur mongoz
Maki vari – synonym of Varecia variegata variegata
Microcebus coquereli – synonym of Mirza coquereli
Microcebus minor griseorufus – synonym of Microcebus murinus
Microcebus myoxinus – synonym of Microcebus murinus
Microcebus rufus – synonym of Microcebus murinus
Mioxicebus griseus – synonym of Cheirogaleus major
Mioxicebus griseus – synonym of Cheirogaleus major major
Mirza coquerelii – synonym of Mirza coquereli
Mixocebus caniceps – synonym of Lepilemur mustelinus
Myscebus palmarum – synonym of Microcebus murinus
Myspithecus typus – synonym of Cheirogaleus major
Myspithecus typus – synonym of Cheirogaleus major major