 By the end of the 19th century , most of what are today regarded as temnospondyls were placed in the suborder Labyrinthodonta . American paleontologist Ermine Cowles Case called it Labyrinthodonta vera or " true labyrinthodonts " . The names Stegocephalia and Labyrinthodontia were used interchangeably to refer to the order in which it belonged . The labyrinthodontian suborders Microsauria and Branchiosauria , both of which contain temnospondyls , were distinct from Labyrinthodonta . Within Labyrinthodonta were the groups Rhachitomi , Labyrinthodonti , and Embolerimi . Members of Rhachitomi , such as Archegosaurus and Eryops , had rhachitomous vertebrae with enlarged intercentra that displaced the pleurocentra . Labyrinthodonti , such as Mastodonsaurus , Trematosaurus , and Micropholis , had lost their pleurocentra , and the intercentra made up the entire body of the vertebrae . Embolerimi had intercentra and pleurocentra that were of equal size . Embolomeres are now identified as reptiliomorphs distantly related to temnospondyls . 
 By the end of the 19th century , most of what are today regarded as temnospondyls <a href='uninflect' title='1'><mark>were</mark></a> placed in the suborder Labyrinthodonta . American paleontologist Ermine Cowles Case called it Labyrinthodonta vera or " true labyrinthodonts " . The names Stegocephalia and Labyrinthodontia <a href='uninflect' title='2'><mark>were</mark></a> used interchangeably to refer to the order in which it belonged . The labyrinthodontian suborders Microsauria and Branchiosauria , both of which contain temnospondyls , <a href='uninflect' title='3'><mark>were</mark></a> distinct from Labyrinthodonta . Within Labyrinthodonta <a href='uninflect' title='4'><mark>were</mark></a> the groups Rhachitomi , Labyrinthodonti , and Embolerimi . Members of Rhachitomi , such as Archegosaurus and Eryops , had rhachitomous vertebrae with enlarged intercentra <a href='null_relcl' title='5'><mark>that</mark></a>displaced the pleurocentra . Labyrinthodonti , such as Mastodonsaurus , Trematosaurus , and Micropholis , <a href='been_done' title='6'><mark>had</mark></a> lost their pleurocentra , and the intercentra made up the entire body of the vertebrae . Embolerimi had intercentra and pleurocentra <a href='null_relcl' title='7'><mark>that</mark></a><a href='uninflect' title='8'><mark>were</mark></a> of equal size . Embolomeres are now identified as reptiliomorphs distantly related to temnospondyls . 
By the end of the 19th century , most of wht are today regarded as temnospondyls was placed in the suborder Labyrinthodonta . American paleontologist Ermine Cowles Case called it Labyrinthodonta vera or " tru labyrinthodonts " . da names Stegocephalia and Labyrinthodontia was used interchangeably to refer to the order in which it belonged . The labyrinthodontian suborders Microsauria and Branchiosauria , both of which contain temnospondyls , was distinct from Labyrinthodonta . Within Labyrinthodonta was the groups Rhachitomi , Labyrinthodonti , and Embolerimi . Members of Rhachitomi , such as Archegosaurus and Eryops , had rhachitomous vertebrae with enlarged intercentra displaced the pleurocentra . Labyrinthodonti , such as Mastodonsaurus , Trematosaurus , and Micropholis , done lost their pleurocentra , and the intercentra made up the entire body of tdavertebrae . Embolerimi had intercentra and pleurocentra was of equal size . Embolomeres are now identified as reptiliomorphs distantly related to temnospondyls .