In air, where oxygen is more concentrated, some small species can rely solely on cutaneous gas exchange, most famously the plethodontid salamanders, which have neither lungs nor gills.
ɪn ˈɛɹ, wˌɛɹ ˈɑːksɪdʒən ɪz mˈoːɹ kˈɑːnsəntɹˌeɪɾᵻd, sˌʌm smˈɔːl spˈiːsiːz kæn ɹᵻlˈaɪ sˈoʊlli ˌɔn kjuːtˈeɪniəs ɡˈæs ɛkstʃˈeɪndʒ, mˈoʊst fˈeɪməsli ðə plˈɛθədˌɔntɪd sˈælɐmˌændɚz, wˌɪtʃ hæv nˈiːðɚ lˈʌŋz nˈɔːɹ ɡˈɪlz.