Temporal range:
Mastodonsaurus giganteus.JPG
Skeleton of Mastodonsaurus giganteus in the Staatliches Museum für Naturkunde Stuttgart
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Temnospondyli
Suborder: Stereospondyli
Clade: Capitosauria
Family: Mastodonsauridae
Genus: Mastodonsaurus
Jaeger, 1828
Type species
Mastodonsaurus jaegeri Holl, 1829
Other species
  • M. giganteus (Jaeger, 1828)
  • M. cappelensis Wepfer, 1923
  • M. torvus Konzhukova, 1955
  • Batrachosaurus? Fitzinger, 1837
  • Heptasaurus Säve-Söderbergh, 1935 (likely synonym)
  • Labyrinthodon Owen, 1841
  • Salamandroides Jaeger, 1828

Mastodonsaurus (meaning "teat tooth lizard") is an extinct genus of temnospondyl amphibian from the Middle Triassic of Europe. It belongs to a Triassic group of temnospondyls called Capitosauria, characterized by their large body size and presumably aquatic lifestyles. Mastodonsaurus remains one of the largest amphibians known, and may have exceeded 6 meters (20 feet) in length.

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