Number of Genera: 1 – Leiopelma
Number of Species: 4 – Archey’s frog (Leiopelma archeyi), Hamilton’s frog (Leiopelma hamiltoni), Hochstetter’s frog, (Leiopelma hochstetteri), and Maud Island frog (Leiopelma pakeka)
Leiopelmatidae is one of the most primitive frog families. They have an extra vertebrae making them have 9 in total, only frogs of the family Ascaphidae (Tailed Frogs) also have 9. They also still have tail muscles.
Leiopelmatidae is endemic to New Zealand.