 The naming of these first specimens was disputed , however . Leopold Fitzinger named the animal Batrachosaurus in 1837 . In 1841 , English palaeontologist Richard Owen referred to the genus as Labyrinthodon to describe its highly folded or labyrinthine teeth . Owen thought the name Mastodonsaurus " ought not to be retained , because it recalls unavoidably the idea of the mammalian genus Mastodon , or else a mammilloid form of the tooth ... and because the second element of the word , saurus , indicates a false affinity , the remains belonging , not to the Saurian , but to the Batrachian order of Reptiles . " Owen recognized the animal was not a " saurian " reptile , yet he also referred Jaeger 's Phytosaurus to the genus . Although the two genera both have similarly sized conical teeth , Phytosaurus was later found to be a crocodile @-@ like reptile . Additional material , including skulls , firmly placed Labyrinthodon as an amphibian . Jaeger also named Salamandroides giganteus in 1828 , basing it on partial occiput , or back portion of the skull . In 1833 , he described a complete skull of S. giganteus that had the same teeth as his Mastodonsaurus , making it the first known complete skull of a temnospondyl . Because Mastodonsaurus was named first , it has precedence over the other names as a senior subjective synonym . Batrachosaurus is still used as the name of an unrelated brachyopid temnospondyl . 
 The naming of these first specimens was disputed , however . Leopold Fitzinger named the animal Batrachosaurus in 1837 . In 1841 , English palaeontologist Richard Owen referred to the genus as Labyrinthodon to describe its highly folded or labyrinthine teeth . Owen thought the name Mastodonsaurus " ought not to be retained , because it <a href='uninflect' title='1'><mark>recalls</mark></a> unavoidably the idea of the mammalian genus Mastodon , or else a mammilloid form of the tooth ... and because the second element of the word , saurus , <a href='uninflect' title='2'><mark>indicates</mark></a> a false affinity , the remains belonging , not to the Saurian , but to the Batrachian order of Reptiles . " Owen recognized the animal <a href='negative_concord' title='3'><mark>was</mark></a> <a href='negative_concord' title='4'><mark>not</mark></a>a " saurian " reptile , yet he also referred Jaeger <a href='null_genetive' title='5'><mark>'s</mark></a>Phytosaurus to the genus . Although the two genera both have similarly sized conical teeth , Phytosaurus was later found to be a crocodile @-@ like reptile . Additional material , including skulls , firmly placed Labyrinthodon as an amphibian . Jaeger also named Salamandroides giganteus in 1828 , basing it on partial occiput , or back portion of the skull . In 1833 , he described a complete skull of S. giganteus <a href='null_relcl' title='6'><mark>that</mark></a>had the same teeth as his Mastodonsaurus , making it the first known complete skull of a temnospondyl . Because Mastodonsaurus was named first , it <a href='got' title='7'><mark>has</mark></a> precedence over the other names as a senior subjective synonym . Batrachosaurus is still used as the name of an unrelated brachyopid temnospondyl . 
The naming of dem first specimens was disputed , however . Leopold Fitzinger named da animal Batrachosaurus in 1837 . In 1841 , English palaeontologist Richard Owen referred to the genus as Labyrinthodon to describe its highly folded or labyrinthine teeth . Owen thought tdaname Mastodonsaurus " ought not to b retained , because it recall unavoidably thdadea of the mammalian genus Mastodon , or else a mammilloid form of the tooth ... and because thedacond element of the word , saurus , indicate a false affinity , the remains belonging , not to the darian , but to the Batrachian order of Reptiles . " Owen recognized the adaal ain't a " saurian " reptile , yet he also referred Jaeger  Phytosaurus to the geda . Although the twodanera both have similarly sized conical teef , Phytosaurus was later found to be a crocodile @-@ like reptile . Additional material , including skulls , firmly placed Labyrinthodon as an amphibian . Jaeger also named Salamandroides giganteus in 1828 , basing it on partial occiput , or back portion of the skull . In 1833 , he described a complete skull of S. giganteus had the same teeth as his Mastodonsaurus , making it the first known complete skull of a temnospondyl . Because Mastodonsaurus was named first , it got precedence ova the othedaames as a senior subjective synonym . Batrachosaurus is still used as the name daan unrelated brachyopid temnospondyl .