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True frogs, Harlequin frogs, and Others
The bufonids are species with a cosmopolitan distribution that notably vary in shape, size and diversity of coloration. In terms of size, the Bufonidae species range from diminutive species like Dendrophryniscus carvalhoi Izecksohn, 1994 (less than 20 mm SVL in adults), to species like those of Rhinella marina's group (about 230 mm SVL in adults).
In relation to coloration, there are species that have evident colors in their skins, reminding us the Dendrobatidae family. Atelophus pulcher (Boulenger, 1882), for example, shows a yellowish skin with black patches along their body. On the other hand, other species have a less outstanding coloration, like Rhinella jimi (Stevaux, 2002), which has a slightly greenish body with dark patches at the back.
A bufonids' unique feature is the presence of the Bidder's organ in the male tadpoles; this organ can also persist in the majority of adults. All adult individuals of the family lack teeth on their jaw, what makes the Bufonidae toothless frogs during the adult stage.