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A little wonder, every day

Lungless salamanders are amphibians

Червоноспинна саламандра Plethodon cinereus, представник безлегеневої родини; фото дорослої тварини, не ембріологічний препарат / Red-backed salamander Plethodon cinereus, a member of the lungless family; adult photograph, not an embryological specimen. Credit: Brian.gratwicke; CC BY-SA 3.0. https://creativecommons.org/licenses/by-sa/3.0 Source: https://commons.wikimedia.org/?curid=6625471

Червоноспинна саламандра Plethodon cinereus, представник безлегеневої родини; фото дорослої тварини, не ембріологічний препарат / Red-backed salamander Plethodon cinereus, a member of the lungless family; adult photograph, not an embryological specimen. Credit: Brian.gratwicke; CC BY-SA 3.0. https://creativecommons.org/licenses/by-sa/3.0 Source: https://commons.wikimedia.org/?curid=6625471

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Some salamanders live without lungs: they are amphibians, rather than lizard reptiles. Adult Plethodontidae exchange gases through skin and oral surfaces. A 2022 study found transient lung rudiments in their embryos that subsequently regressed. This does not support the original story about lizards losing lungs after returning to the sea.