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The largest living amphibian is the 1.8 m (5 ft 11 in) Chinese giant salamander (Andrias davidianus), but this is dwarfed by the extinct 9 m (30 ft) Prionosuchus from the middle Permian of Brazil. The study of amphibians is called batrachology, while the study of both reptiles and amphibians is called herpetology.
Today, the term amphioxus is still used as a common name for the Amphioxiformes, along with lancelet, especially in the English language.A non-technical review of all aspects of lancelet biology is: Stokes, M. D. and Holland, N. D. 1998.ancelets are typically 5 centimetres (2.0 in) long, or 7 centimetres (2.8 in) at the longest. They have a translucent, somewhat fish-like body, but without any paired fins or other limbs. A relatively poorly developed tail fin is present, so they are not especially good swimmers.