Why would Sillerpeton be aquatic?
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Sure, Coloraderpeton was (lateral-line canals: Pardo et al., 2017), but phlegethontiids (of which Sillerpeton is one) were not – two have been found on a fossil forest floor that was covered by volcanic ash, without any water being involved in the deposition. References and some discussion in Marjanović & Laurin (2019).
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