Plethodontidae
Plethodontidae is the largest salamander family, characterized by adults that lack lungs and exchange gases mainly through the skin and mouth lining.
Cutaneous respiration: Gas exchange across the skin, used by many animals including lungless salamanders. Plethodontids rely heavily on their moist skin to absorb oxygen and release carbon dioxide.
Salamander: An amphibian with a long body, tail, and usually four limbs. Plethodontids are one of the major salamander families.
Salamander evolution: The evolutionary history and diversification of salamanders. Plethodontidae is a major salamander lineage whose ancestry helps explain its distinctive traits.
Salamander conservation: Efforts to protect salamander species, populations, and habitats. Plethodontid species face habitat loss, disease, and climate-related pressures.
Buccopharyngeal respiration: Gas exchange across the moist lining of the mouth and throat. The mouth lining supplements skin breathing in lungless plethodontids.
Lungless salamander: A salamander that lacks lungs and relies on skin and mouth-lining gas exchange. This common name describes the defining respiratory condition of Plethodontidae.
Desmognathinae: A subfamily of plethodontid salamanders that includes dusky salamanders. Its members represent a distinct early-diverging branch within the family.
Amphibian chytridiomycosis: A deadly amphibian disease caused by chytrid fungi that infect the skin. Because plethodontids exchange gases through their skin, skin disease can threaten their physiology.
Salamander skin: The permeable, gland-rich outer covering of salamanders. Its thin, moist surface enables gas exchange while also making water loss a constant risk.
Amphibian: A vertebrate lineage that includes frogs, salamanders, and caecilians. Plethodontidae belongs to the salamander branch of amphibians.