Otton frog

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Otton frog
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Anura
Family: Ranidae
Genus: Babina
Species: B. subaspera
Binomial name
Babina subaspera
(Barbour, 1908)

Rana subaspera Barbour, 1908

The Otton frog (Babina subaspera), is a species of frog in the family Ranidae. It is endemic to the islands of Amami Ōshima and Kakeromajima in the Ryukyu Islands, Japan. Its natural habitats are subtropical or tropical moist lowland forests, freshwater marshes, and intermittent freshwater marshes. Once considered a delicacy as a source of food, it is now threatened by habitat loss through deforestation, and predation by introduced mongooses.

It is one of only two species (the other being Babina holsti) to possess a "pseudothumb" on the forelimbs.[2]


  1. ^ Yoshio Kaneko & Masafumi Matsui (2004). "Babina subaspera". IUCN Red List of Threatened Species. Version 2009.2. International Union for Conservation of Nature. Retrieved February 11, 2010. 
  2. ^ Masayoshi Tokita & Noriko Iwai (2010). "Development of the pseudothumb in frogs". Biology Letters 6 (4): in press. doi:10.1098/rsbl.2009.1038.