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Paedocypris progenetica is a species of cyprinid fish endemic to Sumatra (Indonesia) where it is found in peat swamps and blackwater streams. It is the smallest known fish in the world with females reaching a maximum size of 10.3 mm, males 9.8 mm and the smallest known mature specimen, a female, measured only 7.9 mm. It held the record for the smallest known vertebrate until the frog Paedophryne amauensis was formally described in January 2012. However, the methods used to measure fish (from snout tip to end of tail) and frogs (from snout tip to anus) are so different that a comparison makes little biological sense.
- Kottelat, Maurice; Britz, Ralf; Heok Hui, Tan; Witte, Kai-Erik (2005). "Paedocypris, a new genus of Southeast Asian cyprinid fish with a remarkable sexual dimorphism, comprises the world’s smallest vertebrate". Proceedings of the Royal Society B (The Royal Society) 273: 895–899. doi:10.1098/rspb.2005.3419. Retrieved 26 October 2012.
- Busson, Frédéric; Froese, Rainer (15 November 2011). "Paedocypris progenetica". FishBase. Retrieved 13 January 2012.
- "World's tiniest frogs found in Papua New Guinea". The Australian. 12 January 2012. Retrieved 11 January 2012.
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