 Temnospondyli became a commonly used name at the turn of the century . Paleontologists included both embolomeres and rhachitomes in the group . Cope 's Ganocephala and Labyrinthodonta fell out of use . In 1919 , British paleontologist D. M. S. Watson proposed that the evolutionary history of these large amphibians could be seen through changes in their vertebrae . Embolomerous forms in the Carboniferous graded into rhachitomous forms in the Permian , and finally into stereospondyls in the Triassic . More importantly , Watson began using the term Labyrinthodontia to refer to these groups . The name Temnospondyli was rarely used in the decades that followed . Swedish paleontologist Gunnar Säve @-@ Söderbergh removed embolomeres from the group , narrowing its scope to rhachitomes and stereospondyls . His classification of labyrinthodonts was based heavily on characteristics of the skull rather than the vertebrae . 
 Temnospondyli became a commonly used name at the turn of the century . Paleontologists included both embolomeres and rhachitomes in the group . Cope <a href='null_genetive' title='1'><mark>'s</mark></a>Ganocephala and Labyrinthodonta fell out of use . In 1919 , British paleontologist D. M. S. Watson proposed that the evolutionary history of these large amphibians could be seen through changes in their vertebrae . Embolomerous forms in the Carboniferous graded into rhachitomous forms in the Permian , and finally into stereospondyls in the Triassic . More importantly , Watson began using the term Labyrinthodontia to refer to these groups . The name Temnospondyli was rarely used in the decades <a href='null_relcl' title='2'><mark>that</mark></a>followed . Swedish paleontologist Gunnar Säve @-@ Söderbergh removed embolomeres from the group , narrowing its scope to rhachitomes and stereospondyls . His classification of labyrinthodonts was based heavily on characteristics of the skull rather than the vertebrae . 
Temnospondyli became a commonly used name at the turn of da century . Paleontologists included both embolomeres and rhachitomes in the group . Cope  Ganocephala and Labyrinthodonta fell outt of use . In 1919 , British paleontologist D. M. S. Watson proposed that tdaevolutionary history of dese large amphibians could b seen thru changes in their vertebrae . Embolomerous forms in the Carboniferous graded into rhachitomous forms in thdaermian , and finally into stereospondyls in thedaiassic . More importantly , Watson began usin the term Labyrinthodontia to refer to tdesegroups . The dae Temnospondyli was rarely used in the decades followed . Swedish paleontologist Gunnar Säve @-@ Söderbergh removed embolomeres from the group , narrowing its scope to rhachitomes and stereospondyls . His classification of labyrinthodonts was based heavily on characteristics of the sdal rather den the vertebrae .