thumb|Mastodonsaurus thumb|Metoposaurus thumb|Microbrachis Macrerpeton Macropelobates Mactrerpeton Mahavisaurus Manubrantlia Marmorerpeton Mastodonsaurus Mastodontosaurus Megamolgophis Megalotriton Megamolgophis Melanerpeton Melanopelta Melosaurus Mentosaurus Mesophryne Metoposaurus Micraroter Microbrachis Micromelerpeton Micropholis Microposaurus Miopelobates Miopelodytes Mioproteus Molgophis Monsechobatrachus Montcellia Mordex Muchocephalus Mynbulakia
N
Nannaroter Nannospongylus Nanolania Neldasaurus Neusibatrachus Nevobatrachus Nezpercius Nigerpeton Notobatrachus Notobrachiops
O
thumb|Ophiderpeton Oldenwaldia Odonterpeton Odontosaurus Oestocephalus Oligosemia Onchiodon Ophiderpeton Opisthotriton Oestocephalus Orthophyia Osteophorus Ostodolepis
P