 Recently , the theory that temnospondyls were the ancestors of all lissamphibians has gained wide support . The skull morphology of some small temnospondyls has been compared to those of modern frogs and salamanders , but the presence of bicuspid , pedicellate teeth in small , paedomorphic or immature temnospondyls has been cited as the most convincing argument in favor of the temnospondyl origin of lissamphibians . Seen in lissamphibians and many dissorophoid temnospondyls , pedicellate teeth have calcified tips and bases . During the development of most tetrapods , teeth begin to calcify at their tips . Calcification normally proceeds downward to the base of the tooth , but calcification from the tip stops abruptly in pedicellate teeth . Calcification resumes at the base , leaving an area in the center of the tooth uncalcified . This pattern is seen in living amphibians and fossils . 
 Recently , the theory <a href='null_relcl' title='1'><mark>that</mark></a>temnospondyls <a href='uninflect' title='2'><mark>were</mark></a> the ancestors of all lissamphibians <a href='been_done' title='3'><mark>has</mark></a> gained wide support . The skull morphology of some small temnospondyls <a href='been_done' title='4'><mark>has</mark></a> been compared to those of modern frogs and salamanders , but the presence of bicuspid , pedicellate teeth in small , paedomorphic or immature temnospondyls <a href='been_done' title='5'><mark>has</mark></a> been cited as the most convincing argument in favor of the temnospondyl origin of lissamphibians . Seen in lissamphibians and many dissorophoid temnospondyls , pedicellate teeth <a href='been_done' title='6'><mark>have</mark></a> calcified tips and bases . During the development of most tetrapods , teeth begin to calcify at their tips . Calcification normally <a href='uninflect' title='7'><mark>proceeds</mark></a> downward to the base of the tooth , but calcification from the tip <a href='uninflect' title='8'><mark>stops</mark></a> abruptly in pedicellate teeth . Calcification <a href='uninflect' title='9'><mark>resumes</mark></a> at the base , leaving an area in the center of the tooth uncalcified . This pattern is seen in living amphibians and fossils . 
Recently , da theory temnospondyls was the ancestors of all lissamphibians done gained wide support . Tdaskull morphology of some small temnospondyls done been compared to those of modern frogs and salamanders , but the presence of bicuspid , pedicellate teef in small , paedomorphic or immature temnospondyls done been cited as the most convincing argument in favor of the temnospondyl origin of lissamphibians . Seen in lissamphibians and many dissorophoid temnospondyls , pedicellate tteefdone calcified tips and bases . durin thdaevelopment of most tetrapods , teeth begin to calcify at their tips . Calcification normally proceed downward to thedase of the dath , but calcification from the tip stop abruptly in pedicellate teeth . Calcification resume at the bda , leaving an area in the center of the tooth uncalcified . dis pattern is seen in living amphibians and fossils .