 Triassic temnospondyls were often the dominant semiaquatic animals in their environments . Large assemblages of metoposaurs with hundreds of individuals preserved together have been found in the southwestern United States . They have often been interpreted as mass death events caused by droughts in floodplain environments . Recent studies show these dense assemblages were instead probably the result of currents accumulating dead individuals in certain areas . These environments seem to have had little diversity , as they were inhabited almost exclusively by metoposaurs . 
 Triassic temnospondyls <a href='uninflect' title='1'><mark>were</mark></a> often the dominant semiaquatic animals in their environments . Large assemblages of metoposaurs with hundreds of individuals preserved together <a href='been_done' title='2'><mark>have</mark></a> been found in the southwestern United States . They <a href='been_done' title='3'><mark>have</mark></a> often been interpreted as mass death events caused by droughts in floodplain environments . Recent studies show these dense assemblages <a href='uninflect' title='4'><mark>were</mark></a> instead probably the result of currents accumulating dead individuals in certain areas . These environments seem to <a href='been_done' title='5'><mark>have</mark></a> had little diversity , as they <a href='uninflect' title='6'><mark>were</mark></a> inhabited almost exclusively by metoposaurs . 
Triassic temnospondyls was often da dominant semiaquatic animals in their environments . Large assemblages of metoposaurs with hundreds of individuals preserved together done been found in tdasouthwestern United States . They done often been interpreted as mass death events caused by droughts in floodplain environments . Recent studies show these dense assemblages was instead probably the result of currents accumulating dead individuals in certain areas . dem environments seem to done had little diversity , as they was inhabited almost exclusively by metoposaurs .