The divergence time analyses are based on the topology that places Protanguilla as the sister group of all other eels. The resultant timetree indicates that Protanguilla diverged from other eels during the Triassic–Jurassic boundary around 220 Ma. (Johnson et al, 2011)
- Johnson, G. David, Hitoshi Ida, Jiro Sakaue, Tetsuya Sado, Takashi Asahida and Masaki Miya. 2011. A ‘living fossil’ eel (Anguilliformes: Protanguillidae, fam. nov.) from an undersea cave in Palau. Proceedings of the Royal Society B. vol. 279 no. 1730 934-943.
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