 One is that they evolved from dissorophoid temnospondyls . Another is that they evolved from lepospondyls , most likely the lysorophians . A third hypothesis is that caecilians descended from lepospondyls and frogs and salamanders evolved from dissorophoids . 
 One is that they evolved from dissorophoid temnospondyls . Another is that they<a href='been_done' title='1'><mark></mark></a> evolved from lepospondyls , most likely the lysorophians . A third hypothesis is that caecilians descended from lepospondyls and frogs and salamanders evolved from dissorophoids . 
One is that they evolved from dissorophoid temnospondyls . anotha is that they done evolved from lepospondyls , most likely da lysorophians . A third hypothesis is that caecilians descended from lepospondyls and frogs and salamanders evolved from dissorophoids .