 Unlike semiaquatic temnospondyls , terrestrial temnospondyls have skulls that are adapted for biting land @-@ living prey . The sutures between the bones of the skull in the dissorophoid Phonerpeton are able to withstand a high degree of compression . Compressive forces would have been experienced when biting down on prey . Earlier aquatic tetrapods and tetrapod ancestors differ from temnospondyls like Phonerpeton in that their skulls were also built to withstand tension . This tension would have been experienced during suction feeding underwater . Temnospondyls like Phonerpeton were among the first tetrapods that were almost exclusively terrestrial and fed by biting . 
 Unlike semiaquatic temnospondyls , terrestrial temnospondyls <a href='got' title='1'><mark>have</mark></a> skulls <a href='null_relcl' title='2'><mark>that</mark></a>are adapted for biting land @-@ living prey . The sutures between the bones of the skull in the dissorophoid Phonerpeton <a href='drop_aux' title='3'><mark>are</mark></a>able to withstand a high degree of compression . Compressive forces would <a href='been_done' title='4'><mark>have</mark></a> been experienced when biting down on prey . Earlier aquatic tetrapods and tetrapod ancestors differ from temnospondyls like Phonerpeton in that their skulls <a href='uninflect' title='5'><mark>were</mark></a> also built to withstand tension . This tension would <a href='been_done' title='6'><mark>have</mark></a> been experienced during suction feeding underwater . Temnospondyls like Phonerpeton <a href='uninflect' title='7'><mark>were</mark></a> among the first tetrapods <a href='null_relcl' title='8'><mark>that</mark></a><a href='uninflect' title='9'><mark>were</mark></a> almost exclusively terrestrial and fed by biting . 
Unlike semiaquatic temnospondyls , terrestrial temnospondyls got skulls are adapted for biting land @-@ living prey . da sutures between tdabones of the skull in the dissorophoid Phonerpeton able to withstand a high degree of compression . Compressive forces would done been experienced when biting down on prey . Earlier aquatic tetrapods and tetrapod ancestors differ from temnospondyls like Phonerpeton in that their skulls was also built to withstand tension . This tension would done been experienced durin suction feedin underwater . Temnospondyls like Phonerpeton was among the first tetrapods was almost exclusively terrestrial and fed by biting .