Salamander
A tailed amphibian in the order Caudata, with a body adapted to life on land, in water, or both.
Amphibia: A class of vertebrates that includes frogs, salamanders, and caecilians, typically with aquatic larvae and permeable skin. Salamanders belong to this vertebrate class, whose shared traits frame their biology.
Salamander limb regeneration: The regrowth of a salamander limb through formation and patterning of a blastema at the injury site. Salamanders can rebuild complex limbs after amputation, unlike most adult vertebrates.
Bioindicator: An organism or biological response used to assess environmental conditions. Salamanders' permeable skin and habitat sensitivity make their populations useful environmental indicators.
Hellbender: A large, fully aquatic salamander native to streams in the eastern United States. Its flattened body and skin folds suit life in fast-flowing, oxygen-rich water.
Caudata: The amphibian order comprising salamanders and newts, distinguished by adults that retain tails. This is the order that includes all salamanders and newts.
Blastema: A mass of proliferating cells that forms at a wound and can generate tissues during regeneration. A blastema supplies the cells that reconstruct a salamander's lost limb.
Amphibian decline: The widespread reduction of amphibian populations and species, driven by multiple interacting pressures. Salamanders are among the groups affected by habitat loss, disease, and environmental change.
Olm: A blind, cave-dwelling aquatic salamander native to underground waters in southeastern Europe. The olm shows how salamanders have adapted to life in permanent darkness.
Amphibian skin: The thin, permeable skin of amphibians, often involved in respiration and water exchange. Many salamanders exchange gases and absorb water through their moist skin.
Cutaneous respiration: Gas exchange across an animal's skin rather than exclusively through lungs or gills. Salamanders can absorb oxygen through skin, making moisture important for breathing.