Lissamphibia is the only surviving subclass of amphibians, with three orders: frogs/toads, salamanders, and caecilans. The earliest amphibians were basal temnospondyls, evolving from lobe-finned fishes. The origin and relationship between groups of Lissamphibia is unclear, with possible ancestors proposed from temnospondyls or lepospondyls. The origins of tetrapods are also mysterious due to “Romer’s Gap,” but […]

Lissamphibia is the only surviving subclass of amphibians, with three orders: frogs/toads, salamanders, and limbless caecilans. The earliest known amphibians were basal temnospondyls, while the earliest known member of Lissamphibia is the ‘ancient Hotton frog’. The origin and relationship between groups of Lissamphibia are still unclear, with various proposals. The origins of tetrapods are also […]