 While most temnospondyls are aquatic in early stages of life , most metoposaurids appear to have been terrestrial in their juvenile stage . Like other Mesozoic temnospondyls , adult metoposaurids were adapted to a semiaquatic lifestyle . Their bones are not highly developed for movement on land . The cross @-@ sectional thickness of limb bones in adult metoposaurids shows that they could not withstand the stress of terrestrial locomotion . Juvenile individuals have bones that are thick enough to withstand this stress , and could probably move about on land . To maintain a terrestrial lifestyle , a temnospondyl 's limb bones would have to thicken with positive allometry , meaning that they would grow at a greater rate than the rest of the body . This is not the case in metoposaurids , meaning that as their bodies grew larger they became less adapted toward a terrestrial lifestyle . 
 While most temnospondyls <a href='drop_aux' title='1'><mark>are</mark></a>aquatic in early stages of life , most metoposaurids appear to have been terrestrial in their juvenile stage . Like other Mesozoic temnospondyls , adult metoposaurids <a href='uninflect' title='2'><mark>were</mark></a> adapted to a semiaquatic lifestyle . Their bones <a href='negative_concord' title='3'><mark>are</mark></a> <a href='negative_concord' title='4'><mark>not</mark></a>highly developed for movement on land . The cross @-@ sectional thickness of limb bones in adult metoposaurids <a href='uninflect' title='5'><mark>shows</mark></a> that they could not withstand <a href='None' title='6'><mark>the</mark></a><a href='negative_concord' title='7'><mark>stress</mark></a> of terrestrial locomotion . Juvenile individuals <a href='got' title='8'><mark>have</mark></a> bones <a href='null_relcl' title='9'><mark>that</mark></a><a href='drop_aux' title='10'><mark>are</mark></a>thick enough to withstand this stress , and could probably move about on land . To maintain a terrestrial lifestyle , a temnospondyl <a href='null_genetive' title='11'><mark>'s</mark></a>limb bones would have to thicken with positive allometry , meaning that they would grow at a greater rate than the rest of the body . This <a href='negative_concord' title='12'><mark>is</mark></a> <a href='negative_concord' title='13'><mark>not</mark></a><a href='None' title='14'><mark>the</mark></a><a href='negative_concord' title='15'><mark>case</mark></a> in metoposaurids , meaning that as their bodies grew larger they became less adapted toward a terrestrial lifestyle . 
While most temnospondyls aquatic in early stages of life , most metoposaurids appear to have been terrestrial in their juvenile stage . Like other Mesozoic temnospondyls , adult metoposaurids was adapted to a semiaquatic lifestyle . Their bones ain't highly developed for movement on land . The cross @-@ sectional thickness of limb bones in adult metoposaurids show that they could not withstand no stress of terrestrial locomotion . Juvenile individuals got bones thick enough to withstand dis stress , and could probably move about on land . To maintain a terrestrial lifestyle , a temnospondyl  limb bones would gotta thicken w/ positive allometry , meaning that they would grow at a greater rate than da rest of the body . Tdisain't no case in metoposaurids , meaning that as their bodies grew larger they became less adapted toward a terrestrial lifestyle .