 The dissorophoid family Amphibamidae is thought to be most closely related to Lissamphibia . In 2008 , an amphibamid called Gerobatrachus hottoni was named from Texas and was nicknamed the " frogamander " for its frog @-@ like head and salamander @-@ like body . It was thought to be the most closely related temnospondyl to lissamphibians and was placed as the sister taxon of the group in a phylogenetic analysis . Another species of amphibamid called Doleserpeton annectens is now thought to be even more closely related to lissamphibians . Unlike Gerobatrachus , Doleserpeton was known since 1969 , and the presence of pedicellate teeth in its jaws has led some paleontologists to conclude soon after its naming that it was a relative of modern amphibians . It was first described as a " protolissamphibian " , and the specific name annectens means " connecting " in reference to its inferred transitional position between temnospondyls and lissamphibians . The structure of its tympanum , a disk @-@ like membrane that functions like an ear drum , is similar to that of frogs and has also been used as evidence for a close relationship . Other features including the shape of the palate and the back of the skull , the short ribs , and the smooth skull surface also point to it being a closer relative of lissamphibians than is Gerobatrachus . Below is a cladogram modified from Sigurdsen and Bolt ( 2010 ) showing the relationships of Gerobatrachus , Doleserpeton , and Lissamphibia : 
 The dissorophoid family Amphibamidae is thought to be most closely related to Lissamphibia . In 2008 , an amphibamid called Gerobatrachus hottoni was named from Texas and was nicknamed the " frogamander " for its frog @-@ like head and salamander @-@ like body . It was thought to be the most closely related temnospondyl to lissamphibians and was placed as the sister <a href='uninflect' title='1'><mark>taxon</mark></a> of the group in a phylogenetic analysis . Another species of amphibamid called Doleserpeton annectens is now thought to be even more closely related to lissamphibians . Unlike Gerobatrachus , Doleserpeton was known since 1969 , and the presence of pedicellate teeth in its jaws <a href='been_done' title='2'><mark>has</mark></a> led some paleontologists to conclude soon after its naming that it was a relative of modern amphibians . It was first described as a " protolissamphibian " , and the specific name annectens <a href='uninflect' title='3'><mark>means</mark></a> " connecting " in reference to its inferred transitional position between temnospondyls and lissamphibians . The structure of its tympanum , a disk @-@ like membrane that functions like an ear drum , <a href='drop_aux' title='4'><mark>is</mark></a>similar to that of frogs and <a href='been_done' title='5'><mark>has</mark></a> also been used as evidence for a close relationship . Other features including the shape of the palate and the back of the skull , the short ribs , and the smooth skull surface also point to it being a closer relative of lissamphibians than is Gerobatrachus . Below is a cladogram modified from Sigurdsen and Bolt ( 2010 ) showing the relationships of Gerobatrachus , Doleserpeton , and Lissamphibia : 
The dissorophoid family Amphibamidae is thought to b most closely related to Lissamphibia . In 2008 , an amphibamid called Gerobatrachus hottoni was named from Texas and was nicknamed da " frogamander " for its frog @-@ like head and salamander @-@ like body . It was thought to bbthe most closely related temnospondyl to lissamphibians and was placed as tdasister taxoned of the group in a phylogenetic analysis . anotha species of amphibamid called Doleserpeton annectens is now thought to be even more closely related to lissamphibians . Unlike Gerobatrachus , Doleserpeton was known since 1969 , and thdaresence of pedicellate teeth in its jaws done led sum paleontologists to conclude soon after its naming that it was a relative of modern amphibians . It was first described as a " protolissamphibian " , and the specific name annectens mean " connecting " in reference to its inferred transitional position between temnospondyls and lissamphibians . The structure of its tympanum , a disk @-@ like membrane dat functions like an ear drum , similar to that of frogs and done also been used as evidence for a close relationship . Other features including the shape of the palate and the back of the skull , thedaort ribs , and the daoth skull surface also point to it being a closer relative of lissamphibians than is Gerobatrachus . Below is a cladogram modified from Sigurdsen and Bolt ( 2010 ) showin the relationships of Gerobatrachus , Doleserpeton , and Lissamphibia :