Callulina (commonly known as the warty frogs) is a small genus of frogs in the family Brevicipitidae. There are nine species in this genus. They live in Tanzania and Kenya. For a long time, scientists thought that there was only one species in Callulina, a frog that lives in the Eastern Arc Mountains in Tanzania and in southern Kenya. However, they found eight more species. Most of these frogs are in danger of dying out.
12Frost, Darrel R. (2016). "Callulina Nieden, 1911". Amphibian Species of the World: an Online Reference. Version 6.0. American Museum of Natural History. Retrieved 22 January 2016.
↑Loader, S. P.; Measey, G. J.; de Sá, R. O.; Malonza, P. K. (2009). "A new brevicipitid species (Brevicipitidae: Callulina) from the fragmented forests of the Taita Hills, Kenya". Zootaxa. 2123: 55–68. doi:10.11646/zootaxa.2123.1.3.
12Loader, S. P.; Gower, D. J.; Müller, H.; Menegon, M. (2010). "Two new species of Callulina (Amphibia: Anura: Brevicipitidae) from the Nguru Mountains, Tanzania". Zootaxa. 2694: 26–42. doi:10.11646/zootaxa.2694.1.2.
↑de Sá, R. O.; Loader, S. P.; Channing, A. (2004). "A new species of Callulina (Anura: Microhylidae) from the West Usambara Mountains, Tanzania". Journal of Herpetology. 38 (2): 219–224. doi:10.1670/209-03A. S2CID86129626.
↑Menegon, M.; Gower, D. J.; Loader, S. P. (2011). "A remarkable new species of Callulina (Amphibia: Anura: Brevicipitidae) with massive, boldly coloured limb glands". Zootaxa. 3095: 15–26.