A 2005 molecular phylogeny, based on rDNA analysis, suggests that salamanders and caecilians are more closely related to each other than they are to frogs.
ɐ tˈuː θˈaʊzənd fˈaɪv məlˈɛkjʊlɚ faɪlˈɑːdʒɛni, bˈeɪst ˌɔn ˈɑːɹ dˌiːˌɛnˈeɪ ɐnˈæləsˌɪs, sədʒˈɛsts ðæt sˈælɐmˌændɚz ænd kiːsˈɪliənz ɑːɹ mˈoːɹ klˈoʊsli ɹᵻlˈeɪɾᵻd tʊ ˈiːtʃ ˈʌðɚ ðɐn ðeɪ ɑːɹ tə fɹˈɑːɡz.