• Macroclemys, M. temminckii 

    Lovich, Jeffrey E. (Society for the Study of Amphibians and Reptiles, 1993)
  • Malaclemys, M. terrapin 

    Ernst, Carl H.; Bury, R. Bruce (Society for the Study of Amphibians and Reptiles, 1982)
  • Manculus and M. quadridigitatus 

    Mittleman, M. B. (American Society of Ichthyologists and Herpetologists, 1967)
  • Masticophis 

    Wilson, Larry David (Society for the Study of Amphibians and Reptiles, 1973)
  • Masticophis aurigulus 

    Grismer, L. Lee (Society for the Study of Amphibians and Reptiles, 1990)
  • Masticophis bilineatus 

    Camper, Jeffrey D. (Society for the Study of Amphibians and Reptiles, 1996)
  • Masticophis flagellum 

    Wilson, Larry David (Society for the Study of Amphibians and Reptiles, 1973)
  • Masticophis lateralis 

    Jennings, Mark R. (Society for the Study of Amphibians and Reptiles, 1983)
  • Masticophis mentovarius 

    Johnson, Jerry D. (Society for the Study of Amphibians and Reptiles, 1982)
  • Masticophis schotti 

    Camper, Jeffrey D. (Society for the Study of Amphibians and Reptiles, 1996)
  • Masticophis taeniatus 

    Parker, William S. (Society for the Study of Amphibians and Reptiles, 1982)
  • Masticophis taeniatus 

    Camper, Jeffrey D. (Society for the Study of Amphibians and Reptiles, 1996)
  • Mastigodryas bruesi 

    Greene, Brian D.; Powell, Robert; Henderson, Robert W. (Society for the Study of Amphibians and Reptiles, 2003)
  • Melanosuchus, M. niger 

    Vasquez, Pedro G. (Society for the Study of Amphibians and Reptiles, 1991)
  • Metadata training in New Mexico: A case study 

    Lubas, Rebecca; Schneider, Ingrid; Jackson, Amy S. (2011 Transborder Library Forum/Foro Transfronterizo de Bibliotecas, 2011-07)
  • Micruroides, M. euryxanthus 

    Roze, Janis A. (Society for the Study of Amphibians and Reptiles, 1974)
  • Micrurus fulvius 

    Roze, Janis A.; Tilger, Grace M. (Society for the Study of Amphibians and Reptiles, 1983)
  • Micrurus limbatus 

    Greene, Brian D.; Wilkinson, Robert F., Jr.; Powell, Robert (Society for the Study of Amphibians and Reptiles, 1998)
  • Micrurus ruatanus 

    Wilson, Larry David; McCranie, James R.; Slowinski, Joseph B. (Society for the Study of Amphibians and Reptiles, 1992)
  • Minascaecilia sartoria 

    Wake, Marvalee H. (Society for the Study of Amphibians and Reptiles, 1988)