Ambystoma

The genus Ambystoma comprises approximately 32 species of mole salamanders, primarily found in North America. These amphibians are characterized by their short bodies, four legs, and moist skin, typically ranging from 10 to 15 cm in length.123

Many Ambystoma species, like the axolotl (Ambystoma mexicanum), exhibit neoteny, retaining larval features such as external gills into adulthood. They generally have a biphasic life cycle, with aquatic eggs and larvae that metamorphose into terrestrial or semi-aquatic juveniles and adults. Their diet consists of insects, worms, snails, and other small invertebrates. Fertilization is typically internal, with males producing spermatophores that females ingest.435