 However, later studies again confirmed a Late Pennsylvanian age based on biostratigraphy using several new marker fossils, with "Limnoscelis paludis" belonging to this Late Pennsylvanian assemblage.The El Cobre Canyon formation is thought to represent an alluvial plane, with a single-channel meandering river in a semi-arid environment, being one of the earliest representations of a terrestrial fauna.Being semiaquatic, "Limnoscelis" "paludis" would have probably inhabited this river.