 <unk> are placed as basal tetrapods in phylogenetic analyses , with their exact positioning varying between studies . Depending on the classification of modern amphibians , they are either included in the crown group <unk> or the stem of <unk> . Crown @-@ group tetrapods are descendants of the most recent common ancestor of all living tetrapods and stem tetrapods are forms that are outside the crown group . Modern amphibians have recently been suggested as descendants of <unk> , which would place them within crown <unk> . Below is a cladogram from <unk> et al . ( 2003 ) placing Temnospondyli within crown <unk> : 
