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Thecosmilia Trichitoma posted a topic in Fossil Newshttps://www.fairfieldsuntimes.com/arts_and_entertainment/rare-frog-fossil-sheds-light-on-a-gap-in-arizona/article_66eef788-7600-11e9-a337-7bf47cc48d8b.html
A new paper on early lissamphibians is available online: Michelle R. Stocker; Sterling J. Nesbitt; Ben T. Kligman ; Daniel J. Paluh; Adam D. Marsh; David C. Blackburn ; William G. Parker (2019). The earliest equatorial record of frogs from the Late Triassic of Arizona. Biology Letters. 15 (2): Article ID 20180922. doi:10.1098/rsbl.2018.0922. The frog material described by Stocker et al. is significant because it is the first record of Salientia from the Late Triassic, constituting the second described record of Late Triassic Lissamphibia after the primitive caecilian Chinlestegophis. The discovery of Late Triassic frog remains helps fill a gap in the fossil record of early frogs, because Prosailurus is the next oldest fossil frog known from diagnostic remains. Now the next step is to find a Triassic caudatan (salamander) specimen, because the earliest salamanders have been found in the Middle Jurassic.